CN114285469A - Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof - Google Patents
Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof Download PDFInfo
- Publication number
- CN114285469A CN114285469A CN202111356063.7A CN202111356063A CN114285469A CN 114285469 A CN114285469 A CN 114285469A CN 202111356063 A CN202111356063 A CN 202111356063A CN 114285469 A CN114285469 A CN 114285469A
- Authority
- CN
- China
- Prior art keywords
- path
- optical
- output
- paths
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a low-cost 400G optical module for short-distance high-speed transmission and an optical modulation method thereof, wherein the module comprises a single-path 4-longitudinal-mode FP laser, a silicon optical wavelength division demultiplexer, a 4-path silicon optical modulator, an MPO connector, a 4-path detector and a demodulation circuit. Adopting an FP laser near the zero dispersion wavelength, and generating 4 paths of light of single longitudinal mode by a single 4-longitudinal-mode FP laser through a silicon optical wavelength division demultiplexing technology; because the number of the lasers is reduced from 4 paths to 1 path, the cost of the optical module is greatly reduced.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a low-cost 400G optical module for short-distance high-speed transmission and an optical modulation method thereof.
Background
The existing optical module for 400G short-distance transmission generally adopts 4 paths of single-mode or multi-mode lasers for parallel transmission, and the scheme has the defects that 4 paths of high-speed lasers are needed, the chip cost of the high-speed lasers is high, and the cost of the high-speed optical module is greatly influenced.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a low-cost 400G optical module for short-distance high-speed transmission and an optical modulation method thereof. Adopting an FP laser near the zero dispersion wavelength, and generating 4 paths of light of single longitudinal mode by a single 4-longitudinal-mode FP laser through a silicon optical wavelength division demultiplexing technology; because the number of the lasers is reduced from 4 paths to 1 path, the cost of the optical module is greatly reduced.
The technical scheme for solving the technical problems is as follows:
in one aspect, the present invention provides a low-cost 400G optical module for short-distance high-speed transmission, comprising:
the single-path 4 longitudinal mode FP laser is used for forming single-path 4 longitudinal mode laser output;
the silicon optical wavelength division demultiplexer is used for demultiplexing the single-path 4 longitudinal mode laser output by the single-path 4 longitudinal mode FP laser into 4 paths of single longitudinal mode laser;
the 4 paths of silicon optical modulators are respectively connected with the 4 paths of outputs of the silicon optical wavelength division demultiplexer and are used for modulating the 4 paths of direct current light into 4 paths of optical signals to be output;
the MPO connector comprises 4 input ports and 4 output ports, wherein the 4 input ports are connected with the output ends of the 4 silicon optical modulators;
the input end of the 4-path detector is connected with the 4-path output port of the MPO connector, and 4-path optical signals output by the 4-path silicon optical modulator are received through the MPO connector and are subjected to photoelectric conversion; and
and the demodulation circuit is used for demodulating the electric signal output by the detector.
Further, the single-path 4-longitudinal-mode FP laser controls 4 output main modes by adjusting the FP cavity length, so as to generate single-path 4-longitudinal-mode laser output.
Furthermore, the silicon optical wavelength division demultiplexer is an athermal demultiplexer manufactured by silicon optical waveguides, and the structure of the silicon optical wavelength division demultiplexer is in a cascade connection mode of arrayed waveguide gratings or Mark-Zehnder modulators.
Furthermore, the 4-path silicon optical modulator applies the electrical modulation signal to the 4-path direct current light to form a 4-path modulated optical signal.
Further, the demodulation circuit comprises a transimpedance amplifier and a clock data recovery circuit.
On the other hand, the invention also provides an optical modulation method, which is realized based on the low-cost 400G optical module and comprises the following steps:
s1, adjusting by adopting an FP laser within the wavelength range of 1300-1324 nm to form single-path 4 longitudinal mode laser output;
s2, the 4 longitudinal mode laser carries out wavelength demultiplexing through the silicon optical wavelength demultiplexer, and decomposes the single-path 4 longitudinal mode into 4 paths of single longitudinal mode laser;
s3, modulating 4 paths of single longitudinal mode laser into optical signals through a 4 paths of silicon optical modulators;
s4, 4 paths of optical signals are input and output through an MPO interface;
s5, the receiving end directly receives the 4-path optical signal and carries out photoelectric conversion through the detector chip
S6, the electrical signal is demodulated by a subsequent demodulation circuit.
Further, the adjusting and forming of the single-path 4 longitudinal mode laser output comprises: and by adjusting the FP cavity length, the main modes output by the FP laser are controlled to be 4 so as to generate single-path 4 longitudinal mode laser output.
Further, in step S6, the electrical signal is demodulated by a demodulation circuit to recover the original signal, where the demodulation circuit includes a transimpedance amplifier and a clock data recovery circuit.
The invention has the beneficial effects that: adopting an FP laser near the zero dispersion wavelength, and generating 4 paths of light of single longitudinal mode by a single 4-longitudinal-mode FP laser through a silicon optical wavelength division demultiplexing technology; because the number of the lasers is reduced from 4 paths to 1 path, the cost of the optical module is greatly reduced.
Drawings
Fig. 1 is a schematic diagram of a 400G optical module and an optical modulation method thereof according to an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic diagram of a 400G optical module and an optical modulation method thereof according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a low-cost 400G optical module for short-distance high-speed transmission, including: the optical fiber multi-wavelength modulator comprises a single-path 4-longitudinal-mode FP laser, a silicon optical wavelength division demultiplexer, a 4-path silicon optical modulator, an MPO connector, a 4-path detector and a demodulation circuit.
The single-path 4 longitudinal mode FP laser adopts an FP laser in a wavelength range near zero dispersion and is used for forming single-path 4 longitudinal mode laser output. Specifically, by adjusting the FP cavity length, the output primary modes are controlled to 4 to generate a single-channel 4 longitudinal-mode laser output. By adjusting the FP cavity length, the longitudinal mode interval can be controlled at 100GHz, 200GHz and the like according to specific requirements; the number of the main modes is controlled to be 4, and the amplitudes of other FP modes are reduced as much as possible to prevent excessive optical power loss.
The silicon optical wavelength division demultiplexer is an athermal demultiplexer manufactured by silicon optical waveguide, and the temperature drift is reduced. The specific structure of the demultiplexer can select the modes of arrayed waveguide grating or Mark Zehnder modulator cascade connection and the like, and the single-path 4 longitudinal mode laser output by the single-path 4 longitudinal mode FP laser is demultiplexed into 4 paths of single longitudinal mode laser.
The 4 paths of silicon optical modulators are respectively connected with 4 paths of outputs of the silicon optical wavelength division demultiplexer, and the electrical modulation signals are applied to the 4 paths of direct current light through the silicon optical modulators to form 4 paths of modulated optical signals.
The MPO connector is used as a connector and comprises 4 input ports and 4 output ports, wherein the 4 input ports are connected with the output ends of the 4 silicon optical modulators, and the 4 output ports are connected with the input ends of the 4 detector chips.
And the 4-path detector receives the 4 paths of optical signals output by the 4 paths of silicon optical modulators through the MPO connector and performs photoelectric conversion.
The demodulation circuit comprises a trans-impedance amplifier and a clock data recovery circuit and is used for demodulating the electric signal output by the detector.
The invention adopts an FP laser near the zero dispersion wavelength, and 4 paths of light of single longitudinal mode are generated by a single 4 longitudinal mode FP laser through a silicon optical wavelength division demultiplexing technology; because the number of the lasers is reduced from 4 paths to 1 path, the cost of the optical module is greatly reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A low-cost 400G optical module for short-distance high-speed transmission, comprising:
the single-path 4 longitudinal mode FP laser is used for forming single-path 4 longitudinal mode laser output;
the silicon optical wavelength division demultiplexer is used for demultiplexing the single-path 4 longitudinal mode laser output by the single-path 4 longitudinal mode FP laser into 4 paths of single longitudinal mode laser;
the 4 paths of silicon optical modulators are respectively connected with the 4 paths of outputs of the silicon optical wavelength division demultiplexer and are used for modulating the 4 paths of direct current light into 4 paths of optical signals to be output;
the MPO connector comprises 4 input ports and 4 output ports, wherein the 4 input ports are connected with the output ends of the 4 silicon optical modulators;
the input end of the 4-path detector is connected with the 4-path output port of the MPO connector, and 4-path optical signals output by the 4-path silicon optical modulator are received through the MPO connector and are subjected to photoelectric conversion; and
and the demodulation circuit is used for demodulating the electric signal output by the detector.
2. The low-cost 400G optical module of claim 1, wherein the single-path 4 longitudinal-mode FP laser controls the output main modes to be 4 by adjusting the FP cavity length so as to generate single-path 4 longitudinal-mode laser output.
3. The low-cost 400G optical module according to claim 1, wherein the silicon optical wavelength division demultiplexer is an athermal demultiplexer fabricated by silicon optical waveguides, and the structure thereof is an arrayed waveguide grating or a Mark-Zehnder modulator cascade connection mode.
4. The low-cost 400G optical module of claim 1, wherein the 4-way silicon optical modulator applies an electrical modulation signal to 4-way direct current light to form a 4-way modulated optical signal.
5. The low cost 400G optical module of claim 1, wherein the demodulation circuit comprises a transimpedance amplifier and a clock data recovery circuit.
6. A method of modulating light comprising the steps of:
s1, adjusting by adopting an FP laser within the wavelength range of 1300-1324 nm to form single-path 4 longitudinal mode laser output;
s2, the 4 longitudinal mode laser carries out wavelength demultiplexing through the silicon optical wavelength demultiplexer, and decomposes the single-path 4 longitudinal mode into 4 paths of single longitudinal mode laser;
s3, modulating 4 paths of single longitudinal mode laser into optical signals through a 4 paths of silicon optical modulators;
s4, 4 paths of optical signals are input and output through an MPO interface;
s5, the receiving end directly receives the 4-path optical signal and carries out photoelectric conversion through the detector chip
S6, the electrical signal is demodulated by a subsequent demodulation circuit.
7. A method of modulating light according to claim 6, wherein said conditioning produces a single 4 longitudinal mode laser output comprising: and by adjusting the FP cavity length, the main modes output by the FP laser are controlled to be 4 so as to generate single-path 4 longitudinal mode laser output.
8. The optical modulation method according to claim 6, wherein in step S6, the electrical signal is demodulated by a demodulation circuit to recover the original signal, wherein the demodulation circuit comprises a transimpedance amplifier and a clock data recovery circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111356063.7A CN114285469A (en) | 2021-11-16 | 2021-11-16 | Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111356063.7A CN114285469A (en) | 2021-11-16 | 2021-11-16 | Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114285469A true CN114285469A (en) | 2022-04-05 |
Family
ID=80869170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111356063.7A Pending CN114285469A (en) | 2021-11-16 | 2021-11-16 | Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114285469A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030165173A1 (en) * | 2002-03-01 | 2003-09-04 | Helbing Rene P. | Multiple modulated wavelengths in a compact laser |
| CN201051743Y (en) * | 2007-01-18 | 2008-04-23 | 上海未来宽带技术及应用工程研究中心有限公司 | A novel wave division multiplexing system |
| US20110142396A1 (en) * | 2009-10-07 | 2011-06-16 | Aidi Corporation | Athermal silicon photonics array waveguide grating (awg) employing different core geometries in the array waveguides |
| CN202172209U (en) * | 2011-08-30 | 2012-03-21 | 华为技术有限公司 | External cavity tunable laser based on liquid crystal on silicon |
| CN104378171A (en) * | 2013-08-14 | 2015-02-25 | 上海贝尔股份有限公司 | Optical line terminal, optical network unit and optical communication system |
| CN108594480A (en) * | 2018-04-27 | 2018-09-28 | 上海交通大学 | Few mould waveguide light emission structure based on nanometer bundle modulator |
| CN209446819U (en) * | 2019-01-15 | 2019-09-27 | 昆明理工大学 | A kind of silicon photon wavelength division multiplexer of low crosstalk |
-
2021
- 2021-11-16 CN CN202111356063.7A patent/CN114285469A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030165173A1 (en) * | 2002-03-01 | 2003-09-04 | Helbing Rene P. | Multiple modulated wavelengths in a compact laser |
| CN201051743Y (en) * | 2007-01-18 | 2008-04-23 | 上海未来宽带技术及应用工程研究中心有限公司 | A novel wave division multiplexing system |
| US20110142396A1 (en) * | 2009-10-07 | 2011-06-16 | Aidi Corporation | Athermal silicon photonics array waveguide grating (awg) employing different core geometries in the array waveguides |
| CN202172209U (en) * | 2011-08-30 | 2012-03-21 | 华为技术有限公司 | External cavity tunable laser based on liquid crystal on silicon |
| CN104378171A (en) * | 2013-08-14 | 2015-02-25 | 上海贝尔股份有限公司 | Optical line terminal, optical network unit and optical communication system |
| CN108594480A (en) * | 2018-04-27 | 2018-09-28 | 上海交通大学 | Few mould waveguide light emission structure based on nanometer bundle modulator |
| CN209446819U (en) * | 2019-01-15 | 2019-09-27 | 昆明理工大学 | A kind of silicon photon wavelength division multiplexer of low crosstalk |
Non-Patent Citations (1)
| Title |
|---|
| 刘颂豪: "《光子学技术与应用 上册》", 广东科技出版社, pages: 613 - 615 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10338308B2 (en) | Method and system for partial integration of wavelength division multiplexing and bi-directional solutions | |
| US10250207B2 (en) | Method and system for a feedback transimpedance amplifier with sub-40KHZ low-frequency cutoff | |
| US10439727B2 (en) | Method and system for selectable parallel optical fiber and wavelength division multiplexed operation | |
| US11143816B2 (en) | Method and system for stabilized directional couplers | |
| US8798476B2 (en) | Method and system for single laser bidirectional links | |
| US11063671B2 (en) | Method and system for redundant light sources by utilizing two inputs of an integrated modulator | |
| US10855378B2 (en) | Method and system for a silicon-based optical phase modulator with high modal overlap | |
| US20190113822A1 (en) | Method And System For A Vertical Junction High-Speed Phase Modulator | |
| US20170141869A1 (en) | Method and System for Cassette Based Wavelength Division Multiplexing | |
| Ferrari et al. | Compact hybrid-integrated 400 Gbit/s WDM receiver for short-reach optical interconnect in datacenters | |
| CN114285469A (en) | Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof | |
| Liu et al. | High assembly tolerance and cost-effective 100-Gb/s TOSA with silica-PLC AWG multiplexer | |
| de Valicourt et al. | Integrated 5-channel WDM hybrid III-V/Si transmitter enabling 100Gb/s and beyond | |
| Bolle et al. | Compact Hybridly Integrated 10$\,\times\, $11.1-Gb/s DWDM Optical Receiver | |
| CN204631288U (en) | A kind of light source mode locker | |
| Doi et al. | Integrated Photonic Devices and Applications for 100GbE-and-Beyond Datacom |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |