WO2021100070A1 - Modulateur optique et émetteur optique - Google Patents

Modulateur optique et émetteur optique Download PDF

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Publication number
WO2021100070A1
WO2021100070A1 PCT/JP2019/044992 JP2019044992W WO2021100070A1 WO 2021100070 A1 WO2021100070 A1 WO 2021100070A1 JP 2019044992 W JP2019044992 W JP 2019044992W WO 2021100070 A1 WO2021100070 A1 WO 2021100070A1
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WO
WIPO (PCT)
Prior art keywords
wavelength
light
demultiplexer
demultiplexing
combiner
Prior art date
Application number
PCT/JP2019/044992
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English (en)
Japanese (ja)
Inventor
圭 増山
Original Assignee
三菱電機株式会社
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Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/044992 priority Critical patent/WO2021100070A1/fr
Publication of WO2021100070A1 publication Critical patent/WO2021100070A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 

Definitions

  • the present invention relates to an optical modulator and an optical transmitter.
  • wavelength division multiplexing (WDM) technology in which a plurality of optical signals having different wavelengths are transmitted by a single optical fiber, is generally used. This technology enables large-capacity optical transmission.
  • a plurality of single wavelength emitting lasers having different wavelengths of laser light emitted from each other are arranged in parallel on the transmitting side, and the plurality of single wavelength emitting lasers are emitted.
  • Each laser beam is modulated, and a combiner (MUX) generates a combined wave light by combining each modulated laser light, and the combined wave light is transmitted to the receiving side by a single optical fiber.
  • the demultiplexer (DEMUX) installed on the receiving side generates a plurality of demultiplexing lights having different wavelengths by demultiplexing the combined light transmitted by the single optical fiber.
  • a multi-wavelength laser that emits multi-wavelength laser light has been proposed (see, for example, Non-Patent Document 1).
  • a demultiplexer demultiplexes the multi-wavelength laser light emitted by the multi-wavelength laser into a plurality of demultiplexing lights having different wavelengths, and the plurality of the multi-wavelength laser lights.
  • a plurality of external modulators generate modulated light by modulating the corresponding demultiplexing light of the plurality of demultiplexing lights.
  • the combiner generates the combined light by combining the modulated light modulated by the plurality of external modulators, and the combined light is transmitted to the receiving side by a single optical fiber.
  • the demultiplexer and combiner are each realized by a waveguide type element such as a diffraction grating formed on a substrate.
  • a waveguide type element such as a diffraction grating formed on a substrate.
  • the combiner on the transmitting side is combined.
  • the wave characteristics and the demultiplexing characteristics of the demultiplexer on the receiving side must each match the wavelength characteristics defined by the standard, such as the wavelength grid.
  • the center wavelength of the combiner light that can be combined by the combiner which is defined by the combiner characteristics of the combiner on the transmitting side, and the demultiplexing characteristics of the demultiplexer on the receiving side.
  • the central wavelength of the demultiplexing light that can be demultiplexed by the demultiplexer must match the central wavelength defined in the standard.
  • the central wavelength of the combined wave light that can be combined by the combiner which is defined by the combined wave characteristics of the combiner, fluctuates due to the manufacturing error of the combiner.
  • the central wavelength of the demultiplexing light that can be demultiplexed by the demultiplexer which is defined by the demultiplexing characteristics of the demultiplexer, varies depending on the manufacturing error of the demultiplexer. Therefore, by controlling the temperature of the combiner and demultiplexer, or by applying a current to the resistance component formed on the waveguide of the substrate, etc., the combined wave related to the central wavelength of the combined wave light that can be combined is used. It is necessary to control the waveguiding characteristics of the device and the demultiplexing characteristics of the demultiplexer with respect to the central wavelength of the demultiplexable light.
  • the multi-wavelength laser is used on the transmitting side. Both a demultiplexer of a waveguide type element that demultiplexes a plurality of demultiplexing lights and a demultiplexer of a waveguide type element that combines the plurality of demultiplexing lights are used.
  • the demultiplexer controls the demultiplexing characteristics of the demultiplexer with respect to the central wavelength of the demultiplexable light that can be demultiplexed on the transmitting side, while the demultiplexer. It is also necessary to control the wave combination characteristics of the combiner with respect to the central wavelength of the multi-wavelength laser light capable of wave combination, and there is a problem that the power consumption of two units is required.
  • the present invention has been made to solve the above-mentioned problems, and reduces the power consumption required for controlling the demultiplexing characteristics of the demultiplexer and controlling the demultiplexing characteristics of the demultiplexer.
  • the purpose is to provide technology that can be reduced.
  • the optical modulator according to the present invention includes a wavelength combiner / demultiplexer and a plurality of external modulators, and the wavelength combiner / demultiplexer receives input light including light having a plurality of wavelengths different from each other, each having a plurality of wavelengths.
  • the plurality of external modulators modulate the corresponding demultiplexing light of the plurality of demultiplexing lights demultiplexed by the wavelength combiner demultiplexer, respectively.
  • the modulated light is generated, and the wavelength combiner / demultiplexer generates the combined wave light by combining the modulated light returned from the plurality of external modulators.
  • the present invention it is possible to reduce the power consumption required for controlling the demultiplexing characteristics of the demultiplexer and controlling the demultiplexing characteristics of the demultiplexer.
  • FIG. 1 It is the schematic which shows the structure of the optical modulator which concerns on Embodiment 1.
  • FIG. 2 It is the schematic which shows the structure of the optical transmitter which concerns on Embodiment 2.
  • FIG. 1 It is the schematic which shows the structure of the optical modulator which concerns on Embodiment 1.
  • FIG. 1 is a schematic view showing the configuration of the light modulator 100 according to the first embodiment.
  • the light modulator 100 includes a wavelength duplexer 1 and a plurality of external modulators 2.
  • the input light includes light having a plurality of wavelengths different from each other.
  • the light having a plurality of wavelengths different from each other means light showing a plurality of peaks in a graph having an intensity on the vertical axis and wavelengths on the horizontal axis.
  • the light having a plurality of wavelengths different from each other is, for example, a multi-wavelength light emitted by a multi-wavelength light source.
  • the wavelength combiner demultiplexer 1 demultiplexes input light including light having a plurality of wavelengths different from each other into a plurality of demultiplexing lights each having a corresponding wavelength among the plurality of wavelengths. For example, the wavelength combiner demultiplexer 1 sets input light including light having peaks at the first wavelength and the second wavelength, respectively, demultiplexed light having a peak at the first wavelength, and peaks at the second wavelength. It splits into a demultiplexing light that has.
  • the wavelength combiner / demultiplexer 1 demultiplexes the input light input from the input waveguide 3 into a plurality of demultiplexing lights having different wavelengths from each other.
  • the plurality of demultiplexing lights demultiplexed by the wavelength demultiplexer 1 each have a wavelength corresponding to the demultiplexing characteristics of the wavelength demultiplexer 1.
  • the wavelength combiner demultiplexer 1 outputs the plurality of demultiplexed light to the corresponding output waveguide 4 of the plurality of output waveguides 4, respectively.
  • Each of the plurality of output waveguides 4 transmits the demultiplexed light of the corresponding wavelength among the plurality of demultiplexed light demultiplexed by the wavelength combiner demultiplexer 1 to the corresponding external modulation of the plurality of external modulators 2 described later. Communicate to the vessel.
  • the plurality of output waveguides 4 are N output waveguides 4.
  • N is a positive integer of 2 or more.
  • the wavelength combiner demultiplexer 1 outputs the demultiplexed light of the first wavelength of the plurality of demultiplexed light to the first output waveguide 8 of the N output waveguides 4.
  • the demultiplexed light of the second wavelength of the plurality of demultiplexed light is output to the second output waveguide 9 of the N output waveguides 4.
  • Each of the plurality of external modulators 2 has one end optically connected to the corresponding output waveguide 4 of the plurality of output waveguides 4, and each of the other ends is a plurality of input waveguides 5. Optically connected to the corresponding input waveguide of.
  • Each of the plurality of external modulators 2 generates modulated light by modulating the corresponding demultiplexed light among the plurality of demultiplexed lights demultiplexed by the wavelength combined demultiplexer 1.
  • each of the plurality of external modulators 2 generates modulated light by modulating the demultiplexed light input from the corresponding output waveguide 4 of the plurality of output waveguides 4. As a result, data is added to the modulated light.
  • Each of the plurality of external modulators 2 outputs to the corresponding input waveguide among the plurality of input waveguides 5.
  • Each of the plurality of input waveguides 5 transmits the modulated light modulated by the corresponding external modulator among the plurality of external modulators 2 to the wavelength combiner / demultiplexer 1.
  • the plurality of external modulators 2 are N external modulators 2.
  • the first external modulator 6 of the N external modulators 2 is the first by modulating the demultiplexing light input from the first output waveguide 8 of the N output waveguides 4. 1 is generated, and the generated first modulated light is output to the first input waveguide 10 out of the N input waveguides 5.
  • the second external modulator 7 of the N external modulators 2 modulates the demultiplexed light input from the second output waveguide 9 of the N output waveguides 4. The second modulated light is generated by the above method, and the generated second modulated light is output to the second input waveguide 11 out of the N input waveguides 5.
  • the wavelength combiner / demultiplexer 1 has the other end optically further connected to the plurality of input waveguides 5 and one end optically further connected to the output waveguide 12.
  • the wavelength combiner / demultiplexer 1 combines the modulated light generated by the plurality of external modulators 2.
  • the wavelength combiner / demultiplexer 1 generates combined light by combining the modulated light input from the plurality of input waveguides 5.
  • the wavelength combiner / demultiplexer 1 outputs the combined wave light to the output waveguide 12.
  • the output waveguide 12 is connected to, for example, an optical fiber, and transmits the combined light input from the wavelength dividing duplexer 1 to the receiving demultiplexer by wavelength division multiplexing communication.
  • the output waveguide 12 may transmit the input light to the wavelength combiner / demultiplexer 1.
  • the wavelength combiner demultiplexer 1 may demultiplex the input light input from the output waveguide 12 into a plurality of demultiplexing lights having different wavelengths from each other.
  • Each of the plurality of input waveguides 5 transfers the demultiplexing light of the corresponding wavelength among the plurality of demultiplexing lights input from the wavelength combiner demultiplexer 1 to the corresponding external modulator among the plurality of external modulators 2. It may be transmitted.
  • Each of the plurality of external modulators 2 may generate modulated light by modulating the demultiplexed light input from the corresponding input waveguide among the plurality of input waveguides 5.
  • the plurality of output waveguides 4 may transmit the modulated light input from the corresponding external modulator among the plurality of external modulators 2 to the wavelength combiner / demultiplexer 1.
  • the wavelength combiner / demultiplexer 1 is of the central wavelength of the demultiplexable demultiplexing light defined by the demultiplexing characteristic and the demultiplexable combiner light defined by the combiner characteristic. Matches the center wavelength.
  • the wavelength combiner / demultiplexer 1 is defined by the central wavelength of the peak in a plurality of demultiplexable lights defined by the demultiplexing characteristic and the combiner. It matches the center wavelength of the peak in possible combined light.
  • the wavelength duplexer 1 having the demultiplexing characteristics and the conjugate characteristics as described above is, for example, an arrayed waveguide grating (AWG) or an Echelle grating (Echelle Grating).
  • ATG arrayed waveguide grating
  • Echelle Grating Echelle grating
  • each member of the wavelength modulator 1 and the plurality of external modulators 2, the input waveguide 3, the plurality of output waveguides 4, the plurality of input waveguides 5, and the output waveguide 12 is on the same substrate. It may be accumulated in.
  • a light modulator 100 is realized, for example, by being monolithically integrated on the same substrate by silicon photonics.
  • the optical modulator 100 may be realized by hybrid integration in which a material different from the material of the other members is used for the portions of the plurality of external modulators 2, or each of the above members is installed on a barracks substrate. It may be realized by doing.
  • the input waveguide 3 transmits the input light to the wavelength combiner / demultiplexer 1.
  • the wavelength combiner demultiplexer 1 demultiplexes the input light input from the input waveguide 3 into a plurality of demultiplexing lights having different wavelengths from each other.
  • the plurality of output waveguides 4 each transfer the demultiplexing light of the corresponding wavelength among the plurality of demultiplexing lights demultiplexed by the wavelength combiner demultiplexer 1 to the corresponding external of the plurality of external modulators 2. Transfer to the modulator.
  • each of the plurality of external modulators 2 generates modulated light by modulating the corresponding demultiplexed light among the plurality of demultiplexed lights demultiplexed by the wavelength combined demultiplexer 1.
  • each of the plurality of input waveguides 5 transmits the modulated light modulated by the corresponding external modulator among the plurality of external modulators 2 to the wavelength combiner / demultiplexer 1.
  • the wavelength combiner / demultiplexer 1 generates combined light by combining the modulated light input from the plurality of input waveguides 5.
  • the output waveguide 12 is connected to an optical fiber (not shown), and transmits the combined light input from the wavelength dividing duplexer 1 to the receiving side duplexer by wavelength division multiplexing communication.
  • the optical modulator 100 includes a wavelength combiner / demultiplexer 1 and a plurality of external modulators 2, and the wavelength combiner / demultiplexer 1 includes light having a plurality of wavelengths different from each other.
  • the input light is demultiplexed into a plurality of demultiplexing lights each having a corresponding wavelength among the plurality of wavelengths, and a plurality of external modulators 2 each demultiplex a plurality of wavelengths demultiplexed by the wavelength combiner demultiplexer 1.
  • Modulated light is generated by modulating the corresponding demultiplexed light of the wave light, and the wavelength combiner / demultiplexer 1 generates combined wave light by combining each modulated light returned from a plurality of external modulators. ..
  • the optical modulator when performing wavelength division multiplexing communication is a demultiplexer that divides input light including light of a plurality of different wavelengths from a multi-wavelength light source into light of each wavelength. Information is given by waving and modulating each of a plurality of demultiplexed lights with a modulator, and multiple demultiplexed lights of different wavelengths modulated by the combiner are wavelength-multiplexed and output as a single demultiplexed light.
  • a single wavelength duplexer 1 is used instead of the duplexer and duplexer.
  • the demultiplexer or the combiner whose demultiplexing characteristics have deteriorated due to a manufacturing error. There is a problem that the combiner whose wave characteristics have deteriorated is discarded and the yield is lowered.
  • the optical modulator 100 according to the first embodiment since only a single wavelength duplexer 1 is used instead of the duplexer and the duplexer, the problem does not occur and the yield does not occur. Can be improved. Further, according to the optical modulator 100 according to the first embodiment, since only a single wavelength modulator / demultiplexer 1 is used instead of the demultiplexer and the duplexer, the size of the optical modulator 100 is reduced. can do.
  • the wavelength duplexer 1 is defined by the central wavelength of the demultiplexable demultiplexing light defined by the demultiplexing characteristic and the demultiplexing characteristic. , The center wavelength of the combined wave light that can be combined matches. According to the above configuration, the combined demultiplexing function by the wavelength demultiplexer 1 can be suitably realized.
  • the wavelength modulation / demultiplexer 1 in the light modulator 100 is an array waveguide type diffraction grating or an Echelle diffraction grating. According to the above configuration, the combined demultiplexing function by the wavelength demultiplexer 1 can be more preferably realized.
  • Embodiment 2 a multi-wavelength light source that emits multi-wavelength light is used as the light source of the input light that the wavelength combiner / demultiplexer 1 demultiplexes.
  • the second embodiment will be described with reference to the drawings.
  • the same reference numerals are given to the configurations having the same functions as those described in the first embodiment, and the description thereof will be omitted.
  • FIG. 2 is a schematic view showing the configuration of the optical transmitter 101 according to the second embodiment.
  • the optical transmitter 101 includes a multi-wavelength light source 20 and an optical modulator 100 described in the first embodiment.
  • the multi-wavelength light source 20 is optically connected to an end of the input waveguide 3 opposite to the end connected to the wavelength combiner / demultiplexer 1.
  • the multi-wavelength light source 20 emits multi-wavelength light as input light.
  • the input waveguide 3 transmits the input light emitted from the multi-wavelength light source 20 to the wavelength combiner / demultiplexer 1.
  • the multi-wavelength light source 20 is a light source that generates multi-wavelength light, which is continuous light having a plurality of wavelength components, as input light.
  • the multi-wavelength light source 20 is, for example, an optical comb light source, an external resonator type multi-wavelength light source, or the like.
  • the multi-wavelength light source 20 emits multi-wavelength light corresponding to the central wavelength of the demultiplexable demultiplexing light defined by the demultiplexing characteristics of the wavelength combiner / demultiplexer 1. More specifically, for example, the multi-wavelength light source 20 can be demultiplexed by the wavelength demultiplexer 1 in which the central wavelength of the emitted multi-wavelength light is defined by the demultiplexing characteristics of the wavelength demultiplexer 1. The temperature is adjusted to match the center wavelength of the demultiplexed light.
  • the multi-wavelength light source 20 emits multi-wavelength light as input light.
  • the input waveguide 3 transmits the input light emitted from the multi-wavelength light source 20 to the wavelength combiner / demultiplexer 1.
  • the wavelength combiner demultiplexer 1 demultiplexes the input light input from the input waveguide 3 into a plurality of demultiplexing lights having different wavelengths from each other.
  • the plurality of output waveguides 4 each transfer the demultiplexing light of the corresponding wavelength among the plurality of demultiplexing lights demultiplexed by the wavelength combiner demultiplexer 1 to the corresponding external of the plurality of external modulators 2. Transfer to the modulator.
  • each of the plurality of external modulators 2 generates modulated light by modulating the corresponding demultiplexed light among the plurality of demultiplexed lights demultiplexed by the wavelength combined demultiplexer 1.
  • each of the plurality of input waveguides 5 transmits the modulated light modulated by the corresponding external modulator among the plurality of external modulators 2 to the wavelength combiner / demultiplexer 1.
  • the wavelength combiner / demultiplexer 1 generates combined light by combining each modulated light input from the plurality of input waveguides 5.
  • the output waveguide 12 is connected to an optical fiber (not shown), and transmits the combined light input from the wavelength dividing duplexer 1 to the receiving side duplexer by wavelength division multiplexing communication.
  • the optical transmitter 101 includes the light modulator 100 described in the first embodiment and the multi-wavelength light source 20 that emits multi-wavelength light as input light. .. According to the above configuration, in the optical transmitter 101, each effect of the optical modulator 100 described in the first embodiment can be achieved.
  • the multi-wavelength light source 20 has a multi-wavelength corresponding to the central wavelength of the demultiplexable light defined by the demultiplexing characteristic of the wavelength combined demultiplexer 1. Emit light.
  • the wavelength combiner / demultiplexer 1 can suitably demultiplex the multi-wavelength light emitted by the multi-wavelength light source 20.
  • the optical modulator according to the present invention can be used for an optical transmitter because it can reduce the power consumption required for controlling the demultiplexing characteristics of the demultiplexer and controlling the demultiplexing characteristics of the duplexer. It is possible.
  • 1 Wavelength duplexer 2 Multiple external modulators, 3 Input waveguides, 4 Multiple output waveguides, 5 Multiple input waveguides, 6 1st external modulator, 7 2nd external modulator, 8 1st output waveguide, 9 2nd output waveguide, 10 1st input waveguide, 11 2nd input waveguide, 12 output waveguide, 20 multi-wavelength light source, 100 optical modulator, 101 optical transmitter ..

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

Dans ce modulateur optique (100), selon la présente invention, un multiplexeur/démultiplexeur de longueur d'onde (1) sépare un faisceau entrant, qui comprend des faisceaux d'une pluralité de longueurs d'onde différentes, en une pluralité de faisceaux séparés qui ont chacun les longueurs d'onde correspondantes parmi la pluralité de longueurs d'onde, une pluralité de modulateurs externes (2) génére respectivement des faisceaux modulés par modulation des faisceaux séparés correspondants parmi la pluralité de faisceaux séparés séparés par le multiplexeur/démultiplexeur de longueur d'onde (1), et le multiplexeur/démultiplexeur de longueur d'onde (1) génère un faisceau multiplexé par multiplexage des faisceaux modulés qui ont été renvoyés à partir de la pluralité de modulateurs externes (2).
PCT/JP2019/044992 2019-11-18 2019-11-18 Modulateur optique et émetteur optique WO2021100070A1 (fr)

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PCT/JP2019/044992 WO2021100070A1 (fr) 2019-11-18 2019-11-18 Modulateur optique et émetteur optique

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Application Number Priority Date Filing Date Title
PCT/JP2019/044992 WO2021100070A1 (fr) 2019-11-18 2019-11-18 Modulateur optique et émetteur optique

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030228091A1 (en) * 2002-06-05 2003-12-11 Lee Jong-Moo Wavelength selector to be used in wavelength divison multiplexing networks
WO2004102254A1 (fr) * 2003-05-15 2004-11-25 Fujitsu Limited Dispositif optique
JP2006195036A (ja) * 2005-01-12 2006-07-27 National Institute Of Information & Communication Technology 多重光信号処理装置
JP2019527859A (ja) * 2016-07-14 2019-10-03 アヤー・ラブス・インコーポレーテッドＡｙａｒ Ｌａｂｓ Ｉｎｃｏｒｐｏｒａｔｅｄ 光データ通信システム用レーザモジュール

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030228091A1 (en) * 2002-06-05 2003-12-11 Lee Jong-Moo Wavelength selector to be used in wavelength divison multiplexing networks
WO2004102254A1 (fr) * 2003-05-15 2004-11-25 Fujitsu Limited Dispositif optique
JP2006195036A (ja) * 2005-01-12 2006-07-27 National Institute Of Information & Communication Technology 多重光信号処理装置
JP2019527859A (ja) * 2016-07-14 2019-10-03 アヤー・ラブス・インコーポレーテッドＡｙａｒ Ｌａｂｓ Ｉｎｃｏｒｐｏｒａｔｅｄ 光データ通信システム用レーザモジュール

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