CN115061285A - Spectrum shaping method and device - Google Patents
Spectrum shaping method and device Download PDFInfo
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- CN115061285A CN115061285A CN202210786464.4A CN202210786464A CN115061285A CN 115061285 A CN115061285 A CN 115061285A CN 202210786464 A CN202210786464 A CN 202210786464A CN 115061285 A CN115061285 A CN 115061285A
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- division multiplexing
- wavelength division
- multiplexing structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
Abstract
The invention discloses a spectrum shaping method. The spectrum shaping method of the invention divides the original optical signal into a plurality of sub-band signals with different wavelengths by utilizing a wavelength division multiplexing structure, adjusts the amplitude and/or the phase of at least one sub-band signal, and then combines and outputs all the sub-band signals by utilizing the same wavelength division multiplexing structure to obtain the optical signal after spectrum shaping. The invention also discloses a spectrum shaping device. Compared with the prior art, the optical signal is divided into a plurality of channels through the wavelength division multiplexing structure, the amplitude and/or the phase of each channel are independently adjusted, then the adjusted channel signals are multiplexed and output by the wavelength division multiplexing structure, each channel is independently controlled, the adjustment logic is clear, and the power consumption is reduced; and because the scheme is easy to realize on-chip integration, the environmental vibration interference can be effectively resisted.
Description
Technical Field
The invention relates to a spectrum shaping method and a spectrum shaping device.
Background
In the development of optical communication, optical spectrum measurement and other systems, the transmission spectrum of the system is usually changed according to requirements, and the changed parameters include the center wavelength, bandwidth, envelope, dispersion, attenuation and the like of the spectrum. The solution currently commercialized is an arbitrary spectral response device made based on spatial light modulators.
However, any spectral response device manufactured based on the spatial light modulator is generally large in size, high in power consumption, and greatly affected by environmental vibration and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a spectrum shaping method and a spectrum shaping device capable of realizing any spectral response, wherein the power consumption is smaller, the influence of environmental vibration is avoided, and the adjustment logic is clear.
The invention specifically adopts the following technical scheme to solve the technical problems:
a spectrum shaping method divides an original optical signal into a plurality of sub-band signals with different wavelengths by using a wavelength division multiplexing structure, adjusts the amplitude and/or phase of at least one sub-band signal, and then combines and outputs all the sub-band signals by using the same wavelength division multiplexing structure to obtain the optical signal after spectrum shaping.
Preferably, the wavelength division multiplexing structure is one of the following structures: cascaded micro-ring filters, cascaded backward directional couplers, arrayed waveguide gratings, echelle diffraction gratings, MZI lattice filters.
Preferably, the amplitude adjustment is performed using a mach-zehnder interferometer, or an electro-absorption modulator, or a micro-ring modulator.
Preferably, the phase adjustment is performed using a thermally or electrically adjusted phase shifter.
The following technical scheme can be obtained based on the same inventive concept:
a spectral shaping device, comprising:
a first wavelength division multiplexing structure for dividing an original optical signal into a plurality of sub-band signals of different wavelengths;
the amplitude and phase adjusting module is used for adjusting the amplitude and/or the phase of at least one subband signal;
and the second wavelength division multiplexing structure is the same as the first wavelength division multiplexing structure and is used for multiplexing and outputting all the sub-band signals to obtain the optical signals after spectral shaping.
Preferably, the first wavelength division multiplexing structure and the second wavelength division multiplexing structure are one of the following structures: cascaded micro-ring filters, cascaded backward directional couplers, arrayed waveguide gratings, echelle diffraction gratings, MZI lattice filters.
Preferably, the amplitude and phase adjustment module uses a mach-zehnder interferometer, or an electro-absorption modulator, or a micro-ring modulator for the amplitude adjustment.
Preferably, the amplitude and phase adjustment module performs the phase adjustment using a thermally or electrically adjusted phase shifter.
Preferably, the spectral shaping means is a light integration component.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention divides the optical signal into a plurality of channels through the wavelength division multiplexing structure, independently adjusts the amplitude and/or phase of each channel, then combines the adjusted signals of each channel by the wavelength division multiplexing structure for output, each channel is independently controlled, the adjustment logic is clear, and the power consumption is reduced; and because the scheme is easy to realize on-chip integration, the environmental vibration interference can be effectively resisted.
Drawings
FIG. 1 is a schematic diagram of the structure of the spectrum shaping device according to the present invention;
FIG. 2 is a schematic diagram of a wavelength division multiplexing structure formed by cascaded micro-ring filters;
fig. 3 is a schematic diagram of a wavelength division multiplexing structure formed by cascaded inverse couplers.
Detailed Description
Aiming at the defects in the prior art, the solution idea of the invention is to divide the optical signal into a plurality of channels with different wavelengths through a wavelength division multiplexing structure, independently adjust the amplitude and/or phase of each channel, and then multiplex and output the adjusted channel signals by the wavelength division multiplexing structure, each channel is independently controlled, the adjustment logic is clear, and the power consumption is reduced; and because the scheme is easy to realize on-chip integration, the environmental vibration interference can be effectively resisted.
A spectrum shaping method divides an original optical signal into a plurality of sub-band signals with different wavelengths by using a wavelength division multiplexing structure, adjusts the amplitude and/or phase of at least one sub-band signal, and then combines and outputs all the sub-band signals by using the same wavelength division multiplexing structure to obtain the optical signal after spectrum shaping.
A spectral shaping device, comprising:
a first wavelength division multiplexing structure for dividing an original optical signal into a plurality of sub-band signals of different wavelengths;
the amplitude and phase adjusting module is used for adjusting the amplitude and/or the phase of at least one subband signal;
and the second wavelength division multiplexing structure is the same as the first wavelength division multiplexing structure and is used for multiplexing and outputting all the sub-band signals to obtain the optical signals after spectral shaping.
For the public understanding, the technical scheme of the invention is explained in detail in the following with the accompanying drawings:
the technical principle of the invention is shown in fig. 1, wherein a wide-spectrum original optical signal is input from a left-side input waveguide, the amplitude of the optical signal is | A |, and the spectrum coverage wavelength range is λ 1- λ n; the Wavelength Division Multiplexing (WDM) structure realizes the shunt coupling of sub-band signals with different wavelengths, for example, sub-band light with wave bands of lambda 1-lambda 2 enters channel 1, sub-band light with wavelengths of lambda 2-lambda 3 enters channel 2, and so on; each branch path is provided with an independent amplitude modulator and an independent phase modulator, and the amplitude and/or the phase can be independently adjusted; and finally, the optical signals after the spectral shaping are output from the right output waveguide through the wave combination of the same wavelength division multiplexing structure.
The wavelength division multiplexing structure may be any existing or future structure, such as a cascaded micro-ring filter, a cascaded backward Coupler (series-Directional Coupler), an AWG (Arrayed Waveguide Grating), an EDG (Echelle Diffraction Grating), an MZI lattice filters, and the like. In consideration of the spectral adjustment accuracy, a cascade micro-ring filter or a cascade backward directional coupler is preferable, and fig. 2 and 3 respectively show a wavelength division multiplexing structure formed by the cascade micro-ring filter and a wavelength division multiplexing structure formed by the cascade backward coupler.
For a micro-ring filter, the resonant wavelength is
Wherein n is eff The effective refractive index of the waveguide is shown as r, the radius of the micro-ring is shown as N, and the resonant wavelength can be adjusted by changing the radius of the micro-ring, so that different wavelengths can be output to enter different channels.
For a reverse coupler, the resonant wavelength is λ 0 ═ Λ (n) eff1 +n eff2 ) Where Λ is the grating period, n eff1 And n eff2 Effective refractive indexes of the two coupled waveguides are respectively, and backward coupling of the obstructed resonant wavelengths can be realized by adjusting the period of the grating, so that the obstructed resonant wavelengths are output to enter different channels.
The amplitude modulation may employ a mach-zehnder interferometer (MZI), an electroabsorption modulator, a micro-ring modulator, or the like.
The phase modulation may employ thermally or electrically modulated phase shifters.
By adopting the technical scheme of the invention to carry out spectrum shaping, only independent amplitude and/or phase adjustment is needed to be carried out on the channel where the corresponding wave band is located according to the required spectrum response, and the spectrum adjustment logic is clear.
Claims (9)
1. A spectrum shaping method is characterized in that an original optical signal is divided into a plurality of sub-band signals with different wavelengths by using a wavelength division multiplexing structure, amplitude and/or phase adjustment is carried out on at least one sub-band signal, and then all the sub-band signals are multiplexed and output by using the same wavelength division multiplexing structure to obtain a spectrum shaped optical signal.
2. The method for spectral shaping according to claim 1, wherein said wavelength division multiplexing structure is one of the following structures: cascaded micro-ring filters, cascaded reverse directional couplers, arrayed waveguide gratings, echelle diffraction gratings, MZI lattice filters.
3. The method of spectral shaping according to claim 1, wherein said amplitude adjustment is performed using a mach-zehnder interferometer, or an electro-absorption modulator, or a micro-ring modulator.
4. The method for spectral shaping according to claim 1, wherein said phase adjustment is performed using a thermally or electrically adjusted phase shifter.
5. A spectral shaping device, comprising:
a first wavelength division multiplexing structure for dividing an original optical signal into a plurality of sub-band signals of different wavelengths;
the amplitude and phase adjusting module is used for adjusting the amplitude and/or the phase of at least one subband signal;
and the second wavelength division multiplexing structure is the same as the first wavelength division multiplexing structure and is used for multiplexing and outputting all the sub-band signals to obtain the optical signals after spectral shaping.
6. The spectral shaping device of claim 5 wherein the first wavelength division multiplexing structure and the second wavelength division multiplexing structure are one of: cascaded micro-ring filters, cascaded backward directional couplers, arrayed waveguide gratings, echelle diffraction gratings, MZI lattice filters.
7. The spectral shaping device of claim 5 wherein the amplitude and phase adjustment module uses a Mach-Zehnder interferometer, or an electro-absorption modulator, or a micro-ring modulator to perform the amplitude adjustment.
8. The spectral shaping device of claim 5 wherein the amplitude and phase adjustment module uses thermally or electrically adjusted phase shifters to perform the phase adjustment.
9. The spectral shaping device of claim 5 wherein the spectral shaping device is an optically integrated component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210786464.4A CN115061285A (en) | 2022-07-04 | 2022-07-04 | Spectrum shaping method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210786464.4A CN115061285A (en) | 2022-07-04 | 2022-07-04 | Spectrum shaping method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115222035A (en) * | 2022-09-20 | 2022-10-21 | 之江实验室 | Photon neural network convolution acceleration chip |
| CN117240368A (en) * | 2023-11-16 | 2023-12-15 | 鹏城实验室 | Optical domain spectrum synthesis system and optical domain spectrum synthesis method |
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2022
- 2022-07-04 CN CN202210786464.4A patent/CN115061285A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115222035A (en) * | 2022-09-20 | 2022-10-21 | 之江实验室 | Photon neural network convolution acceleration chip |
| CN115222035B (en) * | 2022-09-20 | 2022-12-30 | 之江实验室 | Photon neural network convolution acceleration chip |
| CN117240368A (en) * | 2023-11-16 | 2023-12-15 | 鹏城实验室 | Optical domain spectrum synthesis system and optical domain spectrum synthesis method |
| CN117240368B (en) * | 2023-11-16 | 2024-02-20 | 鹏城实验室 | Optical domain spectrum synthesis system and optical domain spectrum synthesis method |
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Effective date of registration: 20230829 Address after: 221000 West Side of Lianghekou Park, Third Ring North Road, Gulou District, Xuzhou City, Jiangsu Province Applicant after: Xuzhou Guangyin Technology Development Co.,Ltd. Address before: No.29, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province, 210000 Applicant before: Nanjing University of Aeronautics and Astronautics |