CN202183553U - APC adjusting circuit applied to optical module - Google Patents
APC adjusting circuit applied to optical module Download PDFInfo
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- CN202183553U CN202183553U CN2011202885957U CN201120288595U CN202183553U CN 202183553 U CN202183553 U CN 202183553U CN 2011202885957 U CN2011202885957 U CN 2011202885957U CN 201120288595 U CN201120288595 U CN 201120288595U CN 202183553 U CN202183553 U CN 202183553U
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Abstract
The utility model relates to the field of optical module, especially relates to an APC adjusting circuit applied to an optical module. In allusion to the problems existed in the prior art, the utility model provides the APC adjusting circuit applied to the optical module; by using a microprocessor to adjust the bias current of a laser diode indirectly, a closed loop control circuit is formed, so that the average output optical power signal of the laser diode is remained unchanged, the circuit is simple in structure, higher in control precision, stability, etc. and low in cost. The APC adjusting circuit applied to the optical module of the utility model comprises a laser driving control circuit, an optical transmitting control circuit, a bias current control circuit, a temperature sampling circuit, a bias current sampling circuit and a feedback circuit; by cooperating and connecting all the circuits, the APC adjustment of the optical module is realized; and the APC adjusting circuit applied to the optical module is applied to the optical module adjusting field.
Description
Technical field
The utility model relates to the optical module field, especially a kind of APC regulating circuit that is applied to optical module.
Background technology
The laser diode that adopts on the optical module generally has VSCEL (Vertical Cavity Surface Emitting Laser; The vertical cavity surface emitting laser), FP (Fabry-Perot laser; Fabry-Perot type laser), DFB (Distributed Feedback laser; Distributed feed-back formula laser), several big type of EML (electro-absorption modulated laser, Electroabsorption Modulated Laser) etc., characteristic such as its threshold current generally changes with temperature when laser diode is worked; Because the variation of characteristics such as threshold current; The Output optical power of laser diode will inevitably and then change, and in order to keep same average light power output, just needs the operating current of corresponding adjusting laser diode.
Stablize Output optical power for the variation that compensates laser diode characteristics, generally adopt APC (automated power control, Automatic Power Control) technology.The laser diode inside of using on the optical module all is made up of a laser diode and a photodiode (PIN diode backlight).The electric current of photodiode is into certain proportionate relationship with the luminous power that goes out of laser diode; The electric current of APC circuit monitoring photodiode; According to the bias current of the Current Regulation laser diode of photodiode, make the luminous power that of laser diode keep invariable.The size of bias current decision laser diode on average go out luminous power.
Be integrated with the APC circuit in the general on the market laser diode drive, the opto-electronic conversion ratio between laser diode and the photodiode generally remains unchanged, and the APC circuit of closed loop just can make the average light power of laser diode remain unchanged.But at SFP+ (Small From-Factor Pluggable Plus) enhancement mode SFP optical module) use in common laser diode drive; ADN2525/2526 series like ADI company does not just contain the APC circuit, needs the designer to add the APC control circuit, adopts the laser diode chip for driving of band APC circuit; Cost is higher; Adopt external simulation APC circuit, complicated circuit, and control precision, stability etc. are relatively poor.
The utility model content
The utility model technical problem to be solved is: to the problem of above-mentioned existence; A kind of APC regulating circuit that is applied to optical module is provided; Through the indirect regulation formation closed control circuit of microprocessor to the laser diode bias current; The average optical output power signal of laser diode is remained unchanged, and circuit structure is simple, control precision, stability etc. are higher, and cost is low.
The technical scheme that the utility model adopts is following:
A kind of APC regulating circuit that is applied to optical module; Comprise Laser Driven control circuit, light sending controling circuit, bias current control circuit; Also comprise feedback circuit; Be used to judge light sending controling circuit G2 port output signal size, output feedback signal is regulated the light signal of light sending controling circuit G5 port output through the bias current control circuit; Said input differential signal is input to the light sending controling circuit through the Laser Driven control circuit; Light sending controling circuit G1 port is connected with bias current control circuit P1 port; Light sending controling circuit G2 port is connected with feedback circuit F2 port, and feedback circuit G4 end is connected with bias current control circuit P2 end.
A kind of APC regulating circuit that is applied to optical module also comprises temperature sampling circuit, is used for the collecting temperature parameter, and said temperature sampling circuit output port is connected with feedback circuit F3 port.
Said temperature sampling circuit is thermistor or temperature sensor.
A kind of APC regulating circuit that is applied to optical module also comprises the bias current sample circuit, is used to gather bias current control circuit P3 port output signal, and the output signal that will gather is through feedback circuit F1 port input feedback circuit.
Said bias current sample circuit is first resistance R 1.
Said feedback circuit is a microprocessor; Said microprocessor has digital-to-analogue conversion interface, analog-to-digital conversion interface; Said bias current control circuit P3 port is connected with the first analog-to-digital conversion port; Light transmitting-receiving control circuit G2 port is connected with the second analog-to-digital conversion port, and said temperature sampling circuit is connected with the 3rd analog-to-digital conversion port of feedback circuit.
Said feedback circuit comprises analog to digital conversion circuit, microprocessor, D/A converting circuit; Said bias current control circuit P3 end is connected with analog to digital conversion circuit F1 port through first resistance R, 1 sampling back; Light transmitting-receiving control circuit G2 port is connected with analog to digital conversion circuit F2 port; Temperature sampling circuit is connected with analog to digital conversion circuit F3 port, and the analog to digital conversion circuit output port is connected with bias current control circuit P2 port through microprocessor, D/A converting circuit successively.
Said feedback circuit also comprises amplifier, and amplifier is connected between analog to digital conversion circuit output port and the bias current control circuit P2 port.
When said D/A converting circuit was the current mode analog to digital conversion circuit, said APC regulating circuit also comprised second resistance R 2, and said second resistance R, 2 one ends are connected with the D/A converting circuit output, said second resistance R, 2 other end ground connection.
In sum, owing to adopted technique scheme, the beneficial effect of the utility model is:
It is that microprocessor is gathered photodiode output current signal corresponding voltage value and compared with set point that microprocessor forms closed control circuit to the indirect regulation of laser diode bias current; Regulate the suitable bias-adjusted signal of output through pid algorithm; Regulate the laser diode bias current; Make the average optical output power signal of laser diode reach dynamic equilibrium and then stable output light signal, wherein also real-time monitoring laser diode bias current output is also gathered the laser diode ambient temperature, makes that circuit design and implementation method are simpler; Control precision is high; Low, the flexible function of circuit power consumption, and realize temperature-compensating well, go in the design of optical modules such as SFP+ SR, LR, ER, ZR.
Description of drawings
The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the utility model schematic block circuit diagram.
Fig. 2 is a light sending controling circuit sketch map in the prior art.
Bias current control circuit in Fig. 3 prior art.
Fig. 4 is the utility model feedback circuit.
Embodiment
Disclosed all characteristics in this specification, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1; A kind of APC regulating circuit that is applied to optical module comprises Laser Driven control circuit, light sending controling circuit, bias current control circuit, temperature sampling circuit, bias current sample circuit, feedback circuit, temperature sampling circuit, bias current sample circuit.Feedback circuit is used to judge light sending controling circuit G2 port output signal size, and regulates the output offset conditioning signal is regulated the output of light sending controling circuit G5 port through the bias current control circuit light signal through pid algorithm.Temperature sampling circuit is used for the collecting temperature parameter, and said temperature sampling circuit output port is connected with feedback circuit F3 port.The bias current sample circuit is used to gather bias current control circuit P3 port output signal, and the output signal that will gather is through feedback circuit F1 port input feedback circuit.Input differential signal is input to light sending controling circuit G3 port, light sending controling circuit G4 port through the Laser Driven control circuit; Light sending controling circuit G1 port is connected with bias current control circuit P1 port; Light sending controling circuit G2 port is connected with feedback circuit F2 port, and feedback circuit G4 end is connected with bias current control circuit P2 end.
Fig. 2, light sending controling circuit comprise laser diode, photodiode, the 3rd resistance R 3, inductance L, and said Laser Driven control circuit output is connected with light sending controling circuit G3 port, light sending controling circuit G4 port respectively; Laser diode anode, photodiode cathode concurrent connect, and as light sending controling circuit G4 port; Laser diode anode, photodiode cathode are connected with power Vcc through inductance L; Laser diode cathode is as light sending controling circuit G1 port; The 3rd resistance R 3 one end ground connection; The 3rd resistance R 3 other ends are connected with photodiode anode, and send control module G2 port as light, and the light signal of laser diode is through light sending controling circuit G5 port (not shown) output.The biasing circuit that laser diode produces is through the output of G1 port.Photodiode is through real-time monitoring laser diode Output optical power size, and output current signal in proportion through 3 samplings of the 3rd resistance R, converts current signal into voltage signal through the output of G2 port again.
The bias current control circuit comprises image current source circuit, triode, amplifier etc. among Fig. 3; Wherein the 7th resistance R 7, the 8th resistance R 8, the first triode T0, the second triode T1 form mirror current source; The emitter of the first triode T0, the second triode T1 is connected with power Vcc through the 7th resistance R 7, the 8th resistance R 8 respectively; Bias current control circuit P2 end is connected with the 3rd triode T2 base stage, the 4th triode T3 base stage through the amplifier anode end; The amplifier negative pole end is connected with the 4th triode T3 emitter; The 3rd triode T2 emitter is connected with the 4th resistance R 4 one ends through the 6th resistance R 6 through the 5th resistance, the 4th triode T3 emitter; The 4th resistance R 4 other ends are connected with bias current control circuit P2 port, and the 3rd diode T2 collector electrode is connected with the first triode T0 collector electrode, and the 4th transistor collector is as bias current control circuit P3 port; The second triode T1 collector electrode is held as bias current control circuit P1; Bias current control circuit P1 port is connected with bias current control circuit P3 port, and when feedback circuit was regulated the bias current signal of light sending controling circuit G1 port output through P2 port input feedback signal, bias current control circuit P1, the output of bias current control circuit P2 port changed simultaneously.
Feedback circuit comprises analog to digital conversion circuit, microprocessor, D/A converting circuit, amplifier, second resistance R 2 among Fig. 4; (bigoted current control circuit P3 port is connected with analog to digital conversion circuit F1 port, first resistance R, 1 one ends bias current control circuit P3 end through first resistance R, 1 sampling back; First resistance R, 1 other end ground connection) be connected with analog to digital conversion circuit F1 port; Light transmitting-receiving control circuit G2 port is connected with analog to digital conversion circuit F2 port; Temperature sampling circuit is connected with analog to digital conversion circuit F3 port; The analog to digital conversion circuit output port is connected with bias current control circuit P2 port through microprocessor, D/A converting circuit, amplifier successively, and second resistance R, 2 one terminal number analog conversion circuit outputs connect, second resistance R, 2 other end ground connection.
The control method of this device may further comprise the steps:
Step 1, feedback circuit collecting temperature sample circuit output signal, testing environment temperature;
Step 2, the light sending controling circuit drives through the Laser Driven control circuit, produces two paths of signals through G1, the output of G2 port;
Step 3 is handled the bias current signal that light sending controling circuit G1 end produces through bias current control circuit, bias current sample circuit, and is input to feedback circuit through feedback circuit F1 end, and monitor optical is sent the output of control module bias current in real time;
Step 4; Feedback circuit compares voltage signal and the setting voltage signal that light sending controling circuit G2 port produces (when the laser diode Output optical power changes; Then the photodiode output current changes; Through after 3 samplings of the 3rd resistance R signal being input in the feedback circuit, compare with established standards value in the feedback circuit, and adopt pid algorithm to regulate generation bias-adjusted signal);
Step 5; With the size of bias-adjusted signal through bias current control circuit P2 port input adjusting laser diode bias current and bias current Control current P3 port output current signal; And then the laser diode average luminescence power of light sending controling circuit regulated (through the adjusting of bias-adjusted signal; The stable again output of laser diode bias current; And then the stable output of laser diode light signal), the light signal after reconciling is exported through light sending controling circuit G5 port.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (9)
1. an APC regulating circuit that is applied to optical module comprises Laser Driven control circuit, light sending controling circuit, bias current control circuit, it is characterized in that also comprising:
Feedback circuit is used to judge light sending controling circuit G2 port output signal size, and output feedback signal is regulated the light signal of light sending controling circuit G5 port output through the bias current control circuit;
Said input differential signal is input to the light sending controling circuit through the Laser Driven control circuit; Light sending controling circuit G1 port is connected with bias current control circuit P1 port; Light sending controling circuit G2 port is connected with feedback circuit F2 port, and feedback circuit G4 end is connected with bias current control circuit P2 end.
2. a kind of APC regulating circuit that is applied to optical module according to claim 1 is characterized in that also comprising temperature sampling circuit, is used for the collecting temperature parameter, and said temperature sampling circuit output port is connected with feedback circuit F3 port.
3. a kind of APC regulating circuit that is applied to optical module according to claim 2 is characterized in that said temperature sampling circuit is thermistor or temperature sensor.
4. a kind of APC regulating circuit that is applied to optical module according to claim 1; It is characterized in that also comprising the bias current sample circuit; Be used to gather bias current control circuit P3 port output signal, and the output signal that will gather is through feedback circuit F1 port input feedback circuit.
5. a kind of APC regulating circuit that is applied to optical module according to claim 4 is characterized in that said bias current sample circuit is first resistance R 1.
6. a kind of APC regulating circuit that is applied to optical module according to claim 1; It is characterized in that said feedback circuit is a microprocessor; Said microprocessor has digital-to-analogue conversion interface, analog-to-digital conversion interface; Said bias current control circuit P3 port is connected with the first analog-to-digital conversion port, and light transmitting-receiving control circuit G2 port is connected with the second analog-to-digital conversion port, and said temperature sampling circuit is connected with the 3rd analog-to-digital conversion port of feedback circuit.
7. a kind of APC regulating circuit that is applied to optical module according to claim 1; It is characterized in that said feedback circuit comprises analog to digital conversion circuit, microprocessor, D/A converting circuit; Said bias current control circuit P3 end is connected with analog to digital conversion circuit F1 port through first resistance R, 1 sampling back; Light transmitting-receiving control circuit G2 port is connected with analog to digital conversion circuit F2 port; Temperature sampling circuit is connected with analog to digital conversion circuit F3 port, and the analog to digital conversion circuit output port is connected with bias current control circuit P2 port through microprocessor, D/A converting circuit successively.
8. a kind of APC regulating circuit that is applied to optical module according to claim 7 is characterized in that said feedback circuit also comprises amplifier, and amplifier is connected between analog to digital conversion circuit output port and the bias current control circuit P2 port.
9. a kind of APC regulating circuit that is applied to optical module according to claim 7; When it is characterized in that said D/A converting circuit is the current mode analog to digital conversion circuit; Said APC regulating circuit also comprises second resistance R 2; Said second resistance R, 2 one ends are connected with the D/A converting circuit output, said second resistance R, 2 other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202885957U CN202183553U (en) | 2011-08-10 | 2011-08-10 | APC adjusting circuit applied to optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202885957U CN202183553U (en) | 2011-08-10 | 2011-08-10 | APC adjusting circuit applied to optical module |
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| CN202183553U true CN202183553U (en) | 2012-04-04 |
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| CN2011202885957U Expired - Lifetime CN202183553U (en) | 2011-08-10 | 2011-08-10 | APC adjusting circuit applied to optical module |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597810A (en) * | 2014-12-12 | 2015-05-06 | 四川华拓光通信股份有限公司 | Output light power stability control method of optical module |
| CN105406347A (en) * | 2015-11-19 | 2016-03-16 | 江汉大学 | Laser device with high stability |
| CN106324770A (en) * | 2015-06-18 | 2017-01-11 | 珠海思开达技术有限公司 | Hot-pluggable analog light emitting module based on XFP |
| CN108802750A (en) * | 2018-06-15 | 2018-11-13 | 枣阳市米朗科技有限公司 | A kind of modulation drive circuit for laser ranging |
| TWI659583B (en) * | 2018-01-04 | 2019-05-11 | 財團法人工業技術研究院 | Laser driver and method for driving laser source thereof |
| CN110572216A (en) * | 2019-09-17 | 2019-12-13 | 成都芯瑞科技股份有限公司 | optical module APC control software implementation method |
| CN111313226A (en) * | 2020-02-21 | 2020-06-19 | 国开启科量子技术(北京)有限公司 | High-speed driving method and device for quantum communication high-extinction-ratio narrow-pulse light source |
| CN113241586A (en) * | 2021-04-20 | 2021-08-10 | 航天恒星科技有限公司 | Output stable optical power control method for spacecraft optical transceiver module |
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2011
- 2011-08-10 CN CN2011202885957U patent/CN202183553U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597810A (en) * | 2014-12-12 | 2015-05-06 | 四川华拓光通信股份有限公司 | Output light power stability control method of optical module |
| CN106324770A (en) * | 2015-06-18 | 2017-01-11 | 珠海思开达技术有限公司 | Hot-pluggable analog light emitting module based on XFP |
| CN106324770B (en) * | 2015-06-18 | 2017-11-10 | 珠海思开达技术有限公司 | A kind of simulated light hair module hot-swappable based on XFP |
| CN105406347A (en) * | 2015-11-19 | 2016-03-16 | 江汉大学 | Laser device with high stability |
| US10447008B2 (en) | 2018-01-04 | 2019-10-15 | Industrial Technology Research Institute | Laser driver and method for driving laser source thereof |
| TWI659583B (en) * | 2018-01-04 | 2019-05-11 | 財團法人工業技術研究院 | Laser driver and method for driving laser source thereof |
| CN108802750A (en) * | 2018-06-15 | 2018-11-13 | 枣阳市米朗科技有限公司 | A kind of modulation drive circuit for laser ranging |
| CN108802750B (en) * | 2018-06-15 | 2023-12-26 | 湖北米朗科技股份有限公司 | Modulation driving circuit for laser ranging |
| CN110572216A (en) * | 2019-09-17 | 2019-12-13 | 成都芯瑞科技股份有限公司 | optical module APC control software implementation method |
| CN111313226A (en) * | 2020-02-21 | 2020-06-19 | 国开启科量子技术(北京)有限公司 | High-speed driving method and device for quantum communication high-extinction-ratio narrow-pulse light source |
| CN111313226B (en) * | 2020-02-21 | 2021-12-03 | 国开启科量子技术(北京)有限公司 | High-speed driving method and device for quantum communication high-extinction-ratio narrow-pulse light source |
| CN113241586A (en) * | 2021-04-20 | 2021-08-10 | 航天恒星科技有限公司 | Output stable optical power control method for spacecraft optical transceiver module |
| CN113241586B (en) * | 2021-04-20 | 2022-07-29 | 航天恒星科技有限公司 | Output stable optical power control method for spacecraft optical transceiver module |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU EOPTOLINK TECHNOLOGY, INC. Free format text: FORMER NAME: CHENGDU EOPTOLINK TECHNOLOGY INC., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Hite Industrial Park No. 21 High-tech Zone Gaopeng road in Chengdu city of Sichuan province 610041 No. 2 Building 5 floor Patentee after: Eoptolink Technology Inc., Ltd. Address before: 610031 Sichuan province Chengdu city Chengdu high tech Zone Gaopeng Road No. 21, Industrial Park No. 2 Building 5 floor Patentee before: Eoptolink Technology Inc. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120404 |
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| CX01 | Expiry of patent term |