• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Optical multimode interference coupling device and method for tuning the response of an optical signal in an optical multimode interference coupler. The device comprises a multimode waveguide structure with an N number of monomode input and output waveguides (10, 20) to allow the propagation of an optical signal injected into said multimode optical coupling device, or MMI coupler, (1), wherein in a region of its interior a plurality of multiple images of said injected optical signal are formed and wherein the MMI coupler (1) comprises a unit (15) to generate a traveling surface acoustic wave (SAW) that it affects said inner region of the MMI coupler (1) to modulate with an opposite phase the effective refractive index of the multiple images formed, the latter being separated by a distance that is determined according to the expression: <lambda;SAW/2 + n λSAW . (Machine-translation by Google Translate, not legally binding)
    公开号:ES2619506A1
    申请号:ES201531897
    申请日:2015-12-23
    公开日:2017-06-26
    发明作者:Antonio CRESPO POVEDA；Mauricio MORAIS DE LIMA；Andrés CANTARERO SÁEZ
    申请人:Universitat de Valencia；
    IPC主号:
    专利说明:

    Multimode interference optical coupler device and method to tune the response of an optical signal to a multimode interference optical coupler
    Technical sector
    The present invention generally concerns the field of optical devices. In particular, the present invention concerns a multimode interference optical coupler device and a method for tuning the response of an optical signal into a multimode interference optical coupler, wherein said optical coupler device (or MMI coupler) comprises a guide of Waves designed to allow the propagation of a high number of modes through the waveguide.
    Prior art
    At present, most of the transmission of long-distance information is done by sending optical signals through optical fibers, which has led to the laying of huge fiber optic transmission networks. As the complexity and volume of the data transferred has greatly increased over time, the need to have great flexibility in the networks has been demonstrated, in order to modify traffic in each of the parts of the network and respond in this way to changes in the demand for data transfer. However, although the signal is transmitted through optical fibers, the signal processing at the nodes thereof is currently carried out in an almost completely electronic way. If it was possible to manipulate the optical signals in the network nodes without the need to use electron-photon conversion interfaces, transmission networks could be made that function more efficiently and quickly, with all the electronic components of the nodes replaced by purely photonic elements.
    Many investigations have been done to design active photonic devices that allow performing the above-mentioned functionalities. Some of these investigations consist of placing metal contacts in the region of the MMI coupler that needs to be modulated, to generate temperature changes (thermo-optical effect) or to apply electric fields (electro-optical effect). In the first case, the thermal inertia itself makes it very difficult to make devices that are very fast (operation in the MHz range), in addition to being almost impossible to maintain the temperature gradient in the perfectly controlled material (it is difficult to control the heat diffusion ). In the second case, it is possible to obtain


    very fast devices (operation in the GHz range), but since they are second-order effects, very long interaction lengths are generally required, resulting in very long devices making integration into photonic circuits difficult. In addition, in both cases, the complexity at the time of manufacturing and contacting the electrodes increases markedly as the number of regions to be modulated increases.
    Several modulators designed from tunable MMI couplers with different coupling length are known from US-B1-6571038. In this patent, it is proposed to modulate only the multiple images of a plane of interest by applying a current, a voltage or a light signal to the material that forms the waveguide in order to modify its optical properties. Although the waveguides in the active region are eliminated in the device proposed in said patent, thus contributing to the reduction of additional phase errors introduced during manufacturing, in order to modulate by applying a current The metallization of electrodes on waveguides manufactured using non-linear materials is necessary. By increasing the number of images to be modulated, the manufacture of the circuits becomes noticeably more complex, a task that can be really difficult for a large number of contacts. Similarly, lighting with a laser only a certain image in the plane of interest requires having a very well focused point, a few microns wide. In any case, it is difficult to have precise control of the region in which the refractive index is being modified either with the placement of electrodes to then apply a current or voltage, or with the application of light, which hinders the operation of the device.
    Also, in document [1] the same authors of the aforementioned US-B1-6571038 patent explicitly state the technical problems that exist to precisely control the flow of current in the different regions of the waveguide, and therefore the problems generated in the control of the changes in the index of refraction of the material which finally generates problems in the correct functioning of the device.
    Document [2] discloses an acoustically modulated AWG (arrayed waveguide grating) device, whose structure is constructed from MMI couplers of equal length with five input and output guides, respectively. Thus, in [2], both couplers are connected by a set of straight and curved guides (S-bends) whose relative length is calculated to produce wavelength dispersion at the output of the device. Two interdigitated transducers (or IDTs) generate two traveling acoustic waves that interfere with each other to generate a stationary acoustic wave that modulates the device


    AWG For this, the straight guide sections placed between the transducers are properly spaced to allow acoustic modulation of the AWG response. By modulating the response using acoustic waves, each wavelength can oscillate rapidly between all the output channels with the frequency of the acoustic wave if sufficient power is applied to the RTDs. Once a complete reconfiguration of the AWG channels has been achieved, it is possible to obtain modulated light at higher harmonics of the acoustic frequency by further increasing the power that is applied to the IDTs. Unlike the present invention, the device of [2] consists of two MMI couplers and has a set of waveguides connected to both couplers that introduce wavelength dispersion. Also, the device of [2] requires two flat IDTs (with straight fingers / electrodes) to generate two traveling acoustic waves that interfere with each other to generate a stationary acoustic wave that modulates the device correctly.
    The document [3] discloses a Mach-Zehnder interferometer constructed from MMI couplers of different length joined by curved wave guides (S-bends). The first MMI coupler divides the light into two beams of equal intensity, which travel through the curved guides connected to two straight guide sections. It is precisely in these straight guides that the acoustic phase difference that modulates the response of the device is introduced. These straight guides are connected to the next MMI coupler by two other curved guides. A single transducer with straight electrodes generates the traveling acoustic wave that modulates the device. In the absence of acoustic modulation, the device divides the signal into two parts of the same intensity. By modulating the response using acoustic waves, the light begins to oscillate rapidly between the two output channels with the frequency of the acoustic wave. Thus, it is possible to obtain modulated light at higher harmonics of the acoustic frequency by increasing the power that is applied to the IDT.
    Likewise, the device proposed in [3] presents some imperfections introduced during manufacturing that can become problematic for the correct functioning of the devices. Thus, the imperfections that are introduced in the arms that connect both MMI couplers are especially critical, since these additional phases degrade the interference in the second coupler, often preventing the correct functioning of the samples. This problem becomes more critical as the number of waveguides increases in the active region of the devices.
    There is, therefore, the need to offer a new multimode interference optical coupler, and a method that uses the aforementioned compact, reconfigurable optical coupler,


    capable of being acoustically modulated by a single interdigitating focusing transducer, which does not have wavelength dispersion, and which can be used in combination with wavelength multiplexers.
    References:
    [1] Multimode Interference Couplers with Tunable Power Splitting Ratios, Juerg Leuthold and Charles H. Joyner, MAY 2001 | VOL. 19, NO. 5 | JOURNAL OF LIGHTWAVE TECHNOLOGY.
    [2] Acoustically driven arrayed waveguide grating, 10 Aug 2015 | Vol. 23, No. 16 | DOI: 10.1364 / OE.23.021213 | OPTICS EXPRESS 21213.
    [3] Synchronized photonic modulators driven by surface acoustic waves, A. Crespo-Poveda et al, 9 September 2013 | Vol. 21, No. 18 | DOI: 10.1364 / OE.21.021669 | OPTICS EXPRESS 21669.
    Explanation of the invention.
    To that end, embodiments of the present invention provide according to a first aspect, a multimode interference optical coupling device, which comprises, like the optical devices known in the state of the art, a waveguide structure multimode with a number N of single-mode input and output waveguides (of a width less than the width of the multimode waveguide) to allow the propagation of an injected optical signal into said multimode interference optical coupling device, or coupler MMI
    Said MMI coupler has a certain length and a certain width and in a region of its interior a series of multiple images of said injected optical signal are formed, the number of which depends on the position along the length of the MMI coupler and the position of the single-mode access guide into which the optical signal is injected, and whose response can be tuned by introducing a set of additional phases in said multiple images.
    Typically, and unlike the known proposals, the proposed device further comprises a unit configured and adapted to generate a traveling surface acoustic wave of a certain width and a certain wavelength that impacts perpendicularly to the direction of light propagation in said inner region of the MMI coupler to modulate with opposite phase the effective refractive index of the multiple images formed, wherein the multiple images formed are separated by a distance determined by the expression: λSAW / 2 + nλSAW.
    For a preferred embodiment, the number N of single-mode input and output waveguides is an even number of waveguides, equal to or greater than 2, which are


    they find a Weff / N distance spaced from each other, Weff being the effective width of the MMI coupler.
    Also, said unit comprises an interdigitated transducer that includes a series of curved geometry metal electrodes.
    Preferably, the length of the MMI coupler is 3Lπ (where Lπ is the beating length) and the inner region is located at L / 2 (where L is the length of the MMI coupler).
    In an exemplary embodiment, the number of multiple images formed in the inner region of the MMI coupler is two. In this case, the device, in a first operational mode, allows to adjust the separation of the two multiple images formed with respect to the wavelength of the acoustic wave by selecting the appropriate width of the MMI coupler and the appropriate positions of the single-mode waveguides of entry and exit. Alternatively, in a second operating mode, the device allows to adjust the wavelength of the acoustic wave with respect to the separation of the two multiple images formed by selecting the spacing of the metal electrodes of the interdigitated transducer.
    The MMI coupler in an exemplary embodiment is a photonic router, which can be installed in at least one node of an optical transmission network to redirect an optical signal to the desired point, without using conversion interfaces to convert it into a electronic signal, making the transmission of signals more efficient and faster.
    Examples of embodiment of the present invention provide according to a second aspect a method for tuning the response of an optical signal in a multimode interference optical coupler, wherein the method comprises propagating an injected optical signal in a multimode interference optical coupling device. , or MMI coupler, through a number N of single-mode input and output waveguides of a width smaller than a multimode section of the MMI coupler; and forming in a region inside the MMI coupler a series of multiple images of the injected optical signal, and whose response can be tuned by introducing a set of additional phases in said multiple images, wherein said MMI coupler comprises a certain length and a certain width


    Unlike the known proposals, the method further comprises modulating the multiple images formed in the inner region of the MMI coupler with an opposite phase, by generating a traveling surface acoustic wave of a certain width and a certain wavelength, which it affects the inner region of the MMI coupler where multiple images are formed, with multiple images formed separated by a distance λSAW / 2 + nλSAW (where λSAW is the wavelength of the acoustic wave and n is an integer).
    Therefore, the present invention allows a single traveling surface acoustic wave to be used, so that it is only necessary to place a single interdigitated transducer, which greatly simplifies the manufacture and subsequent handling of the device. In addition, the use of surface acoustic waves allows to design very efficient and fast devices, and a great simplicity.
    On the other hand, the present invention, by eliminating the waveguides of the active part of the MMI coupler in which the acoustic phase differences are introduced, eliminates possible imperfections that could be introduced in the manufacturing and that affect subsequent performance. In turn, the absence of these waveguides makes it possible to make very compact and robust multimode optical interference coupling devices that are easily integrated into photonic circuits of greater complexity.
    Brief description of the drawings
    The foregoing and other advantages and features will be more fully understood from the following detailed description of some embodiments with reference to the attached drawings, which should be taken by way of illustration and not limitation, in which:
    Fig. 1 is a schematic diagram of a multimode interference optical coupling device. In this case, a single acoustic beam of width WU modulates multiple images of the input field (injected optical signal and propagates through the MMI coupler structure), allowing the optical signal introduced into an arbitrary single-mode input guide oscillate between two well-defined single-mode exit guides.
    Figs. 2A and 2B schematically illustrate the simplified operation of the proposed coupler device for a particular case where the number of single-mode input and output waveguides is equal to 4. In this case, when there is no acoustic excitation (Fig. 2A), the MMI coupler acts as a 'cross-coupler', cross coupler.
    Detailed description of the invention and some examples of realization


    MMI couplers are optical components widely used in the design of integrated photonic circuits, mainly due to their robustness and small size. The central structure of an MMI coupler is a waveguide designed to allow the propagation of a large number of modes through it, typically greater than three. In order to be able to couple and extract the light from the multimode guide, a set of guides of smaller width, usually single mode (both allow propagation in a single way), is placed both at the beginning and at the end of it. The operation of this type of couplers is based on the self-image properties of multimode waveguides (self-imaging). This ability to generate multiple images of the initial field, that is, of the optical signal injected into the MMI coupler, at intervals of the direction of light propagation makes them very useful for dividing and recombining optical signals into photonic integrated circuits.
    A preferred embodiment of the proposed multimode interference optical coupling device is shown in Fig. 1. In this particular case, the MMI 1 coupler comprises a multimode waveguide structure with a number N, preferably even, of single mode waveguides of input 10 and output 20, whose response can be tuned by a traveling surface acoustic wave SAW, generated by a unit
    or interdigitated transducer 15, which modulates the effective refractive index of a narrow section of the MMI 1 coupler itself and, therefore, its response.
    The mentioned single-mode waveguides of input 10 and output 20 are spaced apart by a Weff / N distance, Weff being the effective width of the MMI 1 coupler.
    The MMI 1 coupler can be used as a reconfigurable photonic router, which can be placed on the nodes of an optical transmission network to dynamically modify data traffic. In addition, it is a very compact device, which lacks waveguides of its active region, thus greatly facilitating its integration with other photonic devices on chips of a very contained size.
    The structure of the MMI coupler 1 according to this preferred embodiment comprises a length L of coupling 3Lπ, which is the distance at which a single mirror image of the input field is formed (ie, the optical signal injected into the MMI coupler 1) , and a width W.
    By introducing phase differences in the appropriate places of the MMI 1 coupler, it is possible to alter the way in which the light interferes with the MMI coupler 1 and to modify the position of the mirror image that is formed at the output of the MMI 1 coupler. According to this preferred embodiment, the suitable region of the interior of the MMI coupler 1 for


    Entering these additional phase differences is in the middle of the MMI 1 coupler, for a distance of 3Lπ / 2. In this plane, two multiple images of the input field are formed whose position depends on the single-mode input waveguide 10 of the MMI coupler 1 that is excited.
    A simple way to introduce additional phase differences in the two multiple images is to divide the MMI 1 coupler into two parts along the plane of interest, which are connected by a set of single-mode waveguides into which these additional phases The position of the multiple images in the middle of the MMI coupler 1 makes it possible to use a single interdigitated transducer 15 to generate the said traveling surface acoustic wave SAW that modulates both multiple images with opposite phase. In the proposed device, the interdigitated transducer 15 generates a very narrow acoustic beam that impacts perpendicularly to the direction of light propagation on the MMI coupler, so that the use of waveguides in the modular region (active region) is not necessary. ), so that the result is a compact device formed by a single MMI 1 coupler (instead of two or more, which is usual).
    The interdigitated transducer 15, with its curved geometry metal electrodes, allows the removal in the MMI 1 coupler of the waveguides of the active region of the MMI coupler 1 by generating said SAW traveling surface acoustic wave, with a very narrow beam WU and of a certain wavelength λSAW, which strikes the body of the MMI coupler and modulates the two multiple images of the input field that are formed in the middle of the MMI coupler 1. Similarly, advantageously, it also allows an optical signal introduced in an arbitrary input single-mode waveguide 10, oscillate between two output-set single-wavelength guides 20 perfectly set with the frequency of the acoustic wave that modulates the MMI coupler 1. In addition, harmonic modulated light generation is possible higher acoustic frequency through an increase in the acoustic power introduced.
    The two images that are formed in the inner region of the MMI 1 coupler are separated by a distance that is determined by the expression:
    λSAW / 2 + n λSAW,
    where λSAW is the wavelength of the acoustic wave and n is an integer, so that by applying a single traveling surface acoustic wave SAW each image is modulated with an opposite phase.


    The λSAW wavelength of the SAW traveling surface acoustic wave generated by said interdigitated transducer 15 is determined by the separation between the metal electrodes (fingers) of the interdigitated transducer 15, whereby, according to an embodiment or first operating mode, it is possible to adjust the separation of the multiple images formed inside the MMI1 coupler with respect to λSAW by properly adjusting the width W of the MMI coupler 1 with respect to λSAW. Alternatively, according to an embodiment or second operating mode, the spacing of the metal electrodes of the interdigitated transducer 15 can be adjusted to adjust λSAW to the width of the MMI 1 coupler that is desired to be used. Thus, the SAW traveling surface acoustic wave generated by the interdigitated transducer 15 has a perpendicular impact on the inner region of the MMI coupler 1 in which the two multiple images are formed, modulating their refractive index with the opposite phase and, therefore, maximizing Acousto-optic modulation
    With reference now to Figs. 2A and 2B, therein shows the simplified operation of the proposed device in the case where the number of single-mode waveguides of input 10 and output 20 is equal to 4, ie N = 4. According to this exemplary embodiment, the light enters through the single-mode input waveguide 1. In Fig. 2A, the MMI 1 coupler operates in the absence of acoustic modulation (ie no SAW signal), so that the light introduced in the input single-mode waveguide 10 i = 1 is sent to the output single-mode waveguide 20 k = 4. In Fig. 2B, the operation of the proposed device is shown when the power required to completely reconfigure the channels is applied on the interdigitated transducer 15, so that the signal continuously oscillates between the output single-wavelength guides 20 k = 1 and k = 4 Since the SAW traveling surface acoustic wave is a traveling wave, the multiple images that are formed in the inner region of the MMI 1 coupler will not undergo maximum acoustic modulation at all times. Thus, assuming that the nodes of the SAW traveling surface acoustic wave are initially on the images at t = 0, they will not undergo any modulation at t = 0 and t = TSAW / 2 (where TSAW is the period of the SAW acoustic wave), so the light will follow the path (i, k) = (1,4) as in the absence of modulation. On the other hand, the two images will undergo maximum modulation with opposite phases at t = TSAW / 4 and t = 3TSAW / 4, so that the light will follow the path (i, k) = (1,1).
    A person skilled in the art could introduce changes and modifications in the described embodiments without departing from the scope of the invention as defined in the appended claims.

    权利要求:
    Claims (15)
    [1]
    1. A multimode interference optical coupling device, comprising a multimode waveguide structure with a number N of single-mode input and output waveguides (10, 20) of a width less than a width of the multimode waveguide to allow propagation of an optical signal injected into said multimode interference optical coupler device, or MMI coupler, (1), wherein said MMI coupler (1) has a certain length (L) and a certain width (W) and in a region of its interior forms a series of multiple images of said injected optical signal whose number depends on the position along the length (L) of the MMI coupler (1) and the position of the single-mode access guide in the that the optical signal is injected, and whose response can be tuned by introducing a set of additional phases in said multiple images, the device being characterized in that:
    - The MMI coupler (1) further comprises a unit (15) configured and adapted to generate a traveling surface acoustic wave (SAW) of a certain width (WU) and of a certain wavelength λSAW that perpendicularly affects the direction of propagation of the light in said inner region of the MMI coupler (1) to modulate with an opposite phase the effective refractive index of the multiple images formed; Y
    - the multiple images formed are separated by a distance determined by the expression: λSAW / 2 + nλSAW, where λSAW is the wavelength of the traveling surface acoustic wave (SAW) and n is an integer.
    [2]
    2. Device according to claim 1, characterized in that the number N of single-mode input and output waveguides (10, 20) comprises an even number of waveguides equal to or greater than 2, spaced apart by a Weff / N distance, Weff being an effective width of the MMI coupler (1).
    [3]
    3. Device according to claim 1, characterized in that the unit (15) comprises an interdigitated transducer that includes a series of curved geometry metal electrodes.
    [4]
    Four. Device according to any one of the preceding claims, characterized in that said certain length (L) is 3Lπ and the inner region of the MMI coupler (1) is located at L / 2.
    [5]
    5. Device according to claim 3, characterized in that the number of multiple images formed in the inner region of the MMI coupler (1) is two and that in a first operating mode the device adjusts the separation of the two multiple images formed with respect to the wavelength λSAW of the acoustic wave (SAW) by selecting the width

    (W) of the MMI coupler (1) and the positions of the single-mode input and output waveguides (10, 20).
    [6]
    6. Device according to claim 3, characterized in that the number of multiple images formed in the inner region of the MMI coupler (1) is two and that in a second operating mode the device adjusts the wavelength of the acoustic wave λSAW with respect to the separation of the two multiple images formed by selecting a spacing of the metal electrodes of the interdigitated transducer.
    [7]
    7. Device according to any one of the preceding claims, characterized in that the MMI coupler (1) is a photonic router.
    [8]
    8. Device according to claim 7, characterized in that the photonic router is installed in at least one node of an optical transmission network.
    [9]
    9. Method for tuning the response of an optical signal into a multimode interference optical coupler, comprising: - propagating an optical signal injected into a multimode interference optical coupler device, or MMI coupler (1), through a number N of guides single-mode input and output wave (10, 20) of a width smaller than a multimode section of the MMI coupler; and - forming in a region inside the MMI coupler (1) a series of multiple images of said injected optical signal, and whose response can be tuned by introducing a set of additional phases in said multiple images, wherein said MMI coupler (1 ) comprises a certain length (L) and a certain width (W), the method being characterized in that it further comprises: -modulating the multiple images formed in said inner region of the MMI coupler (1) with an opposite phase by generating a wave traveling surface acoustics (SAW) of a certain width (WU) and of a certain wavelength λSAW that perpendicularly affects the direction of light propagation in the interior region of the MMI coupler (1) where multiple images are formed, the multiple images formed separated by a distance λSAW / 2 + nλSAW, where λSAW is the wavelength of the traveling surface acoustic wave (SAW) and n is an integer.
    [10]
    10. Method according to claim 9, characterized in that the number N of single-mode input and output waveguides (10, 20) comprises an even number of waveguides equal to or greater than 2, spaced apart by a Weff / N distance, Weff being an effective width of the MMI coupler (1).
    [11]
    eleven. Method according to claim 9, characterized in that the MMI coupler (1) comprises an interdigitated transducer that includes a series of curved geometry metal electrodes.

    [12]
    12. Method according to claim 11, characterized in that the acoustic wave perpendicularly affects the direction of light propagation on said inner region of the MMI coupler (1) to modulate with multiple phase the multiple images formed, which are two, by means of a adjustment of the width (W) of the MMI coupler (1) with respect to the length of
    5 λSAW wave of the acoustic wave (SAW) generated.
    [13]
    13. Method according to any of claims 9 to 12, characterized in that said certain length (L) of the MMI coupler (1) is 3Lπ and the inner region of the MMI coupler
    (1) is located at L / 2.
    [14]
    14. Method according to any one of claims 9 to 13, characterized in that the MMI coupler (1) is a photonic router.
    [15]
    15. Method according to claim 14, characterized in that the photonic router is installed in at least one node of an optical transmission network.

     FIG. one 

     FIG. 2A 

    FIG. 2B
    类似技术:
    公开号 | 公开日 | 专利标题
    US7123800B2|2006-10-17|Integrated loop resonator with adjustable couplings and methods of using the same
    EP0265233B1|1992-03-25|Non-linear optical device
    JP2005221999A|2005-08-18|Optical modulator and optical modulator array
    JP2005345554A|2005-12-15|Optical device
    JPWO2004092792A1|2006-07-06|Optical waveguide device
    US20180335570A1|2018-11-22|Photon generator
    JP2007094190A|2007-04-12|Thz wave generating apparatus
    JP3200629B2|2001-08-20|Optical modulator using photonic bandgap structure and optical modulation method
    JP3661036B2|2005-06-15|Waveguide type optical functional element
    ES2619506B2|2017-10-09|Multimode interference optical coupler device and method to tune the response of an optical signal to a multimode interference optical coupler
    US6510266B2|2003-01-21|Tunable optoelectronic frequency filter
    Tu et al.2021|Optical mode conversion based on silicon-on-insulator material Ψ-junction coupler and multimode interferometer
    US20020196816A1|2002-12-26|Wavelength tunable pulse laser
    JP4401682B2|2010-01-20|Phonon polariton waveguide coupled terahertz wave generator
    EP3387473B1|2020-02-05|Tunable microring resonator
    JP2008502026A|2008-01-24|Adjustable delay or resonator waveguide device with Y-junction reflector
    EP1990677A1|2008-11-12|Device and method for modulating light
    JP4644180B2|2011-03-02|Optical variable delay unit and optical variable delay device
    JP4479889B2|2010-06-09|Uniform multi-wavelength optical frequency comb generator
    KR100299121B1|2001-09-06|Optical switch and optical switching method
    JP2004020588A|2004-01-22|Wavelength transformation device
    JP3803776B2|2006-08-02|Waveguide type optical functional device
    JP2016191817A|2016-11-10|Optical integrated circuit, and control method of optical integrated circuit
    Rabus et al.2020|Devices
    JP4756011B2|2011-08-24|Optical device
    同族专利:
    公开号 | 公开日
    ES2619506B2|2017-10-09|
    WO2017109239A1|2017-06-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1990677A1|2007-05-07|2008-11-12|Forschungsverbund Berlin e.V.|Device and method for modulating light|
    WO2012152977A1|2011-05-11|2012-11-15|Universidad Politécnica De Valencia|Tuneable awg device for multiplexing and demultiplexing signals and method for tuning said device|
    US5790720A|1997-05-06|1998-08-04|Lucent Technologies, Inc.|Acoustic-optic silica optical circuit switch|
    法律状态:
    2017-10-09| FG2A| Definitive protection|Ref document number: 2619506 Country of ref document: ES Kind code of ref document: B2 Effective date: 20171009 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201531897A|ES2619506B2|2015-12-23|2015-12-23|Multimode interference optical coupler device and method to tune the response of an optical signal to a multimode interference optical coupler|ES201531897A| ES2619506B2|2015-12-23|2015-12-23|Multimode interference optical coupler device and method to tune the response of an optical signal to a multimode interference optical coupler|
    PCT/ES2016/000134| WO2017109239A1|2015-12-23|2016-12-20|Optical multi-mode interference coupler device and method for tuning the response of an optical signal in an optical multi-mode interference coupler|
    [返回顶部]