CN103916193A - Optical transceiver module with double arms of modulator capable of achieving modulation independently - Google Patents

Optical transceiver module with double arms of modulator capable of achieving modulation independently Download PDF

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Publication number
CN103916193A
CN103916193A CN201410102786.8A CN201410102786A CN103916193A CN 103916193 A CN103916193 A CN 103916193A CN 201410102786 A CN201410102786 A CN 201410102786A CN 103916193 A CN103916193 A CN 103916193A
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modulator
circuit
laser
arms
transceiver module
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CN201410102786.8A
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CN103916193B (en
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王苗庆
韦经福
罗贤树
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SHAOXING ZKTEL EQUIPMENT Co Ltd
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SHAOXING ZKTEL EQUIPMENT Co Ltd
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Abstract

The invention discloses an optical transceiver module with double arms of a modulator capable of achieving modulation independently. The optical transceiver module comprises a laser device, a laser device drive circuit, a transmitting-end optical assembly, a receiving-end optical assembly, a modulator drive circuit, a receiver circuit and a microprocessor, wherein the transmitting-end optical assembly comprises a Mach-Zehnder modulator, the modulator drive circuit comprises a first-stage amplifier and two second-stage amplifiers connected to the output end of the first-stage amplifier in parallel, the output ends of the two second-stage amplifiers are connected with the Mach-Zehnder modulator respectively, and different modulation voltages of two drive sub-circuits are controlled through the microprocessor. In this way, different modulation depths of the left and right arms of the Mach-Zehnder modulator are achieved, longer-distance transmission is achieved, and optical transmission cost is greatly reduced; besides, because the modulator drive circuit is in communication with the microprocessor, only an internal drive circuit and I2C communication between the microprocessor and the drive circuit rather than input and output of a client are needed to be additionally designed, and the optical transceiver module has good compatibility.

Description

A kind of modulator both arms can separate modulation optical transceiver module
Technical field
The present invention relates to the optical transceiver module that a kind of modulator both arms can separate modulation, belong to Optical Fiber Transmission field.
Background technology
Optical transceiver module based on Mach zehnder modulators, by the change of phase place, can be realized intensity modulated and phase-modulation, warbles and can pass through splitting ratio and the bias voltage control of two arms due to it, can realize the transmission of longer distance.In the backbone networks such as metropolitan area and extra long distance transmission light network, play the part of more and more important role.The modulator of optical-fiber network high speed is all to improve based on Mach zehnder modulators at present.
Mach zehnder modulators can pass through to regulate waveguide length and the beam splitting light ratio example of two arms in left and right, realizes negative warbling and warbles with zero.But both arms the recommended modulation limitations performance of modulator, all shorter (80km) of intensity modulated optical transceiver module propagation distance in general optical fiber communication when at present common adopted modulation.
In view of this, the inventor studies this, develops specially the optical transceiver module that a kind of modulator both arms can separate modulation, and this case produces thus.
Summary of the invention
The object of this invention is to provide a kind of optical transceiver module, adopt the Mach zehnder modulators that both arms can separate modulation, solve the shortcoming of intensity modulated optical transceiver module propagation distance shorter (80km) in current optical fiber communication, realize transmission (160km) more at a distance by the modulation depth (being modulation voltage) of optimizing Mach zehnder modulators two arms, thereby greatly reduce the cost of light transmission.
To achieve these goals, solution of the present invention is:
A kind of modulator both arms can separate modulation optical transceiver module, comprise laser, drive circuit for laser, transmitting terminal optical assembly, receiving terminal optical assembly, modulator driver circuit, receiver circuit and microprocessor etc., wherein, described transmitting terminal optical assembly comprises a Mach zehnder modulators, described modulator driver circuit comprises one-level amplifier, and be connected in parallel on 2 two-stage amplifiers of one-level amplifier out, the output of two-stage amplifier is connected with Mach zehnder modulators respectively, and described modulator driver circuit further comprises voltage bias control circuit, microprocessor is connected with two-stage amplifier with the one-level amplifier of receiver circuit, drive circuit for laser, modulator driver circuit respectively, microprocessor is connected with Mach zehnder modulators by voltage bias control circuit simultaneously, and microprocessor is mainly used in controlling the input/output signal of above-mentioned each circuit, modulator driver circuit is connected with Mach zehnder modulators, drive circuit for laser is connected with laser, drive circuit for laser regulates the output wavelength of laser by the electric current of control inputs laser, the continuous light that laser sends is through Mach zehnder modulators, need the signal of telecommunication of transmission to amplify by modulator driver circuit on the Mach zehnder modulators being loaded in transmitting terminal optical assembly, the signal of telecommunication is transformed into light signal, and be transferred to receiving terminal optical assembly, receiving terminal optical assembly converts the light signal receiving after the signal of telecommunication to, input to the input of the limiting amplifier in receiving circuit, after the processing of limiting amplifier, output electrical signals.
As preferably, said modulator drive circuit also comprises the feedback circuit of the cross point of eye pattern with real-time monitoring Mach zehnder modulators, be carried in low-frequency modulation signal on power monitoring detector by monitoring and judge cross point of eye pattern, by regulating the voltage-regulation cross point of eye pattern of Mach zehnder modulators left and right two arms.
As preferably, said modulator both arms can separate modulation optical transceiver module further comprise the APC/ATC automated power circuit and the auto thermal compensation circuit that are connected with Mach zehnder modulators, by the photoelectric current of the detector monitors waveguide to integrated in modulator waveguide, control Output optical power by SOA (semiconductor optical amplifier) electric current that regulates laser; Temperature-compensating is that the thermistor by being integrated on laser and modulator chip carrys out monitoring temperature, controls temperature by the electric current that regulates semiconductor cooler (TEC), realizes the online compensation of the online dynamically control of luminous power and temperature.
As preferably, above-mentioned one-level amplifier adopts the modulator that model is KGL4195KD to drive chip.RF signal enters respectively 2 two-stage amplifiers after amplifying by one-level amplifier.
As preferably, above-mentioned two-stage amplifier is low noise amplifier, be connected with Mach zehnder modulators left and right two arms respectively, form 2 independently drive sub-circuits, by two different modulation voltages of two-stage amplifier of microprocessor control, thereby realize the different modulating degree of depth of Mach zehnder modulators left and right arms, optimize modulating performance.
Said modulator both arms can separate modulation optical transceiver module operation principle: first, drive circuit for laser regulates the output wavelength of laser by the electric current of control inputs laser, the signal of the needs transmission of sending from laser amplifies on the Mach zehnder modulators being loaded into transmitting terminal optical assembly by one-level amplifier and the two-stage amplifier of modulator driver circuit, realizes the conversion of the signal of telecommunication to light signal.Simultaneously, APC/ATC automated power and auto compensatng circuit, realize the online compensation of the online dynamically control of luminous power and temperature, the feedback circuit of the cross point of eye pattern with real-time monitoring modulator in this external modulator driver circuit, be carried in low-frequency modulation signal on power monitoring detector by monitoring and judge cross point of eye pattern, by regulating the voltage-regulation cross point of eye pattern of modulator two arms.Receiving terminal optical assembly converts the light signal transmitting from Mach zehnder modulators the signal of telecommunication to, inputs to the input of the limiting amplifier of receiver circuit, and after the processing of limiting amplifier, output electrical signals, realizes long-distance transmissions.
Said modulator both arms can separate modulation optical transceiver module, left and right two arms of described Mach zehnder modulators have drive electronic circuit, by two different modulation voltages of drive sub-circuits of microprocessor control, thereby realize the different modulating degree of depth of Mach zehnder modulators left and right arms, optimize modulating performance, realize transmission more at a distance, can reach 160km even farthest, greatly reduce the cost of light transmission; And due to modulator driver circuit and microprocessor communication, without increasing the input and output of client's section, the only inner drive circuit of need increase, and microprocessor is communicated by letter with the I2C of drive circuit, has good compatibility, client is without additional designs.
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the optical transceiver module connection diagram of the present embodiment;
Fig. 2 is the modulator driver circuit connection diagram of the present embodiment;
Fig. 3 is the modulator driver circuit schematic diagram of the present embodiment.
Embodiment
As shown in Figure 1-2, a kind of modulator both arms can separate modulation optical transceiver module, comprise laser 1, drive circuit for laser 2, transmitting terminal optical assembly 3, receiving terminal optical assembly 4, modulator driver circuit 7, receiver circuit 5 and microprocessor 6, wherein, described transmitting terminal optical assembly 3 comprises Mach zehnder modulators 31, described receiving terminal optical assembly 4 comprises preamplifier, described modulator driver circuit 7 comprises one-level amplifier 71, and be connected in parallel on left arm two-stage amplifier 72 and the right arm two-stage amplifier 73 of one-level amplifier 71 outputs, the output of left arm two-stage amplifier 72 and right arm two-stage amplifier 73 is connected with Mach zehnder modulators 31 respectively, described modulator driver circuit further comprises voltage bias control circuit 74, microprocessor 6 is connected with one-level amplifier 71, left arm two-stage amplifier 72 and the right arm two-stage amplifier 73 of receiver circuit 5, drive circuit for laser 2, modulator driver circuit 7 respectively, microprocessor 6 is connected with Mach zehnder modulators 31 by voltage bias control circuit 74 simultaneously, for controlling the input/output signal of above-mentioned each circuit, modulator driver circuit 7 is connected with Mach zehnder modulators 31, and drive circuit for laser 2 is connected with laser 1, and drive circuit for laser 2 regulates the output wavelength of laser 1 by the electric current of control inputs laser 1.
In the present embodiment, said modulator drive circuit 2 also comprises the feedback circuit of the cross point of eye pattern with real-time monitoring Mach zehnder modulators, be carried in low-frequency modulation signal on power monitoring detector by monitoring and judge cross point of eye pattern, by regulating the voltage-regulation cross point of eye pattern of Mach zehnder modulators left and right two arms.
Said modulator both arms can separate modulation optical transceiver module further comprise the APC/ATC automated power circuit and the auto thermal compensation circuit that are connected with Mach zehnder modulators, by the photoelectric current of the detector monitors waveguide to integrated in conspicuous zehnder modulators 31 waveguides, control Output optical power by SOA (semiconductor optical amplifier) electric current that regulates laser.Temperature-compensating is that the thermistor by being integrated on laser and modulator chip carrys out monitoring temperature, controls temperature by the electric current that regulates semiconductor cooler (TEC), realizes the online compensation of the online dynamically control of luminous power and temperature.
As shown in Figure 3, the one-level amplifier 71 of said modulator drive circuit 7 adopt model be KGL4195KD modulator drive chip.RF signal enters respectively left arm two-stage amplifier 72 and right arm two-stage amplifier 73 after amplifying by one-level amplifier 71.Described two-stage amplifier is low noise amplifier, is connected respectively with Mach zehnder modulators left and right two arms, forms 2 independently drive sub-circuits.Modulator driver circuit 7 can regulate in 35% ~ 80% scope signal crossing point by XP pin signal.The two arm modulation signal amplitudes (RF_out_N, RF_out_P) of exporting by Amp_ctrl pin signal controlling one-level amplifier 71, export between 1.0 ~ 3.0V Mach zehnder modulators 31 single armed peak-to-peak values.VG_L by microprocessor 6 and VG_R signal are controlled respectively the amplitude of left arm two-stage amplifier 72 and right arm two-stage amplifier 73, realize the modulation signal amplitude of left and right arms is carried out to independent control, finally by AC coupled, the left and right arms of signal input Mach zehnder modulators 31 is realized to both arms separate modulation, the final different modulating degree of depth that realizes Mach zehnder modulators left and right arms, optimize modulating performance, realize transmission (160km) more at a distance; And because modulator driver circuit 7 is communicated by letter with microprocessor 6, without increasing the input and output of client's section, the only inner drive circuit of need increase, and microprocessor 6 is communicated by letter with the I2C of drive circuit, has good compatibility, client is without additional designs.
Said modulator both arms can separate modulation optical transceiver module operation principle: first, drive circuit for laser 2 regulates the output wavelength of laser 1 by the electric current of control inputs laser 1, the light sending from laser 1 enters modulator as DC light source, need the signal of transmission to amplify on the Mach zehnder modulators 31 being loaded in transmitting terminal optical assembly 3 by the one-level amplifier 71 of modulator driver circuit 7, left arm two-stage amplifier 72 and right arm two-stage amplifier 73, realize the conversion of the signal of telecommunication to light signal.Simultaneously, APC/ATC automated power circuit and auto thermal compensation circuit, realize the online compensation of the online dynamically control of luminous power and temperature, the feedback circuit of the cross point of eye pattern with real-time monitoring modulator in this external modulator driver circuit 7, be carried in low-frequency modulation signal on power monitoring detector by monitoring and judge cross point of eye pattern, by regulating the voltage-regulation cross point of eye pattern of modulator two arms.Microprocessor 6 is controlled respectively the amplitude of left arm two-stage amplifier 72 and right arm two-stage amplifier 73, realize the different modulating degree of depth to Mach zehnder modulators 31 left and right arms, receiving terminal optical assembly 4 converts the light signal transmitting from Mach zehnder modulators 31 signal of telecommunication to, input to the input of the limiting amplifier of receiver circuit 5, after the processing of limiting amplifier, output electrical signals, realizes long-distance transmissions, can reach 160km even farthest.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present invention.

Claims (5)

1. the optical transceiver module that modulator both arms can separate modulation, it is characterized in that: comprise laser, drive circuit for laser, transmitting terminal optical assembly, receiving terminal optical assembly, modulator driver circuit, receiver circuit and microprocessor etc., wherein, described transmitting terminal optical assembly comprises a Mach zehnder modulators, described modulator driver circuit comprises one-level amplifier, and be connected in parallel on 2 two-stage amplifiers of one-level amplifier out, the output of two-stage amplifier is connected with Mach zehnder modulators respectively, described modulator driver circuit further comprises voltage bias control circuit, microprocessor is connected with two-stage amplifier with the one-level amplifier of receiver circuit, drive circuit for laser, modulator driver circuit respectively, microprocessor is connected with Mach zehnder modulators by voltage bias control circuit simultaneously, and microprocessor is mainly used in controlling the input/output signal of above-mentioned each circuit, modulator driver circuit is connected with Mach zehnder modulators, drive circuit for laser is connected with laser, drive circuit for laser regulates the output wavelength of laser by the electric current of control inputs laser, the continuous light that laser sends is through Mach zehnder modulators, need the signal of telecommunication of transmission to amplify by modulator driver circuit on the Mach zehnder modulators being loaded in transmitting terminal optical assembly, the signal of telecommunication is transformed into light signal, and be transferred to receiving terminal optical assembly, receiving terminal optical assembly converts the light signal receiving after the signal of telecommunication to, input to the input of the limiting amplifier in receiving circuit, after the processing of limiting amplifier, output electrical signals.
2. the optical transceiver module that a kind of modulator both arms as claimed in claim 1 can separate modulation, is characterized in that: said modulator drive circuit also comprises the feedback circuit of the cross point of eye pattern with real-time monitoring Mach zehnder modulators.
3. the optical transceiver module that a kind of modulator both arms as claimed in claim 1 can separate modulation, it is characterized in that: the optical transceiver module that said modulator both arms can separate modulation further comprises the APC/ATC automated power circuit and the auto thermal compensation circuit that are connected with Mach zehnder modulators, by the photoelectric current of the detector monitors waveguide to integrated in modulator waveguide, control Output optical power by the SOA electric current that regulates laser; Temperature-compensating is that the thermistor by being integrated on laser and modulator chip carrys out monitoring temperature, controls temperature by the electric current that regulates semiconductor cooler, realizes the online compensation of the online dynamically control of luminous power and temperature.
4. the optical transceiver module that a kind of modulator both arms as claimed in claim 1 can separate modulation, is characterized in that: above-mentioned one-level amplifier adopts the modulator that model is KGL4195KD to drive chip.
5. the optical transceiver module that a kind of modulator both arms as claimed in claim 1 can separate modulation, it is characterized in that: above-mentioned two-stage amplifier is low noise amplifier, be connected with Mach zehnder modulators left and right two arms respectively, form 2 independently drive sub-circuits, by two different modulation voltages of two-stage amplifier of microprocessor control.
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Cited By (6)

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CN106330295A (en) * 2015-07-08 2017-01-11 中兴通讯股份有限公司 Electric eye debugging method and device
CN110908213A (en) * 2019-12-10 2020-03-24 电子科技大学 Mach-Zehnder optical waveguide interferometer for realizing working point control based on wavelength tuning
CN111226401A (en) * 2017-09-30 2020-06-02 华为技术有限公司 Optical device, optical module, optical device, and optical line terminal
TWI728575B (en) * 2019-03-01 2021-05-21 美商谷歌有限責任公司 Photonic integrated chip, method of operating the same and transceiver
CN114667051A (en) * 2022-05-25 2022-06-24 绍兴中科通信设备有限公司 Anti-interference optical module
CN115085001A (en) * 2022-07-19 2022-09-20 成都英思嘉半导体技术有限公司 High-speed Mach-Zehnder driver chip controlled by integrated silicon optical integrated circuit

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CN101884004A (en) * 2007-12-04 2010-11-10 株式会社藤仓 Control apparatus and method of external modulator
CN203813792U (en) * 2014-03-19 2014-09-03 绍兴中科通信设备有限公司 Optical transmit-receive module with independently-modulated double arms of modulator

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US20030002141A1 (en) * 2001-06-27 2003-01-02 International Business Machines Corporation Semiconductor optical amplifiers using wavelength locked loop tuning and equalization
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106330295A (en) * 2015-07-08 2017-01-11 中兴通讯股份有限公司 Electric eye debugging method and device
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CN111226401A (en) * 2017-09-30 2020-06-02 华为技术有限公司 Optical device, optical module, optical device, and optical line terminal
CN111226401B (en) * 2017-09-30 2022-02-18 华为技术有限公司 Optical device, optical module, optical device, and optical line terminal
TWI728575B (en) * 2019-03-01 2021-05-21 美商谷歌有限責任公司 Photonic integrated chip, method of operating the same and transceiver
CN110908213A (en) * 2019-12-10 2020-03-24 电子科技大学 Mach-Zehnder optical waveguide interferometer for realizing working point control based on wavelength tuning
CN114667051A (en) * 2022-05-25 2022-06-24 绍兴中科通信设备有限公司 Anti-interference optical module
CN115085001A (en) * 2022-07-19 2022-09-20 成都英思嘉半导体技术有限公司 High-speed Mach-Zehnder driver chip controlled by integrated silicon optical integrated circuit
CN115085001B (en) * 2022-07-19 2022-10-28 成都英思嘉半导体技术有限公司 High-speed Mach-Zehnder driver chip controlled by integrated silicon optical integrated circuit

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Denomination of invention: An optical transceiver module with modulator dual arms that can be independently modulated

Effective date of registration: 20220803

Granted publication date: 20161005

Pledgee: Agricultural Bank of China Co., Ltd. Shaoxing Paojiang Sub-branch

Pledgor: SHAOXING ZKTEL EQUIPMENT Co.,Ltd.

Registration number: Y2022330001592