CN201178510Y - Optical power control APC circuit for voltage boosting driving light transmitter - Google Patents
Optical power control APC circuit for voltage boosting driving light transmitter Download PDFInfo
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- CN201178510Y CN201178510Y CNU2008200934730U CN200820093473U CN201178510Y CN 201178510 Y CN201178510 Y CN 201178510Y CN U2008200934730 U CNU2008200934730 U CN U2008200934730U CN 200820093473 U CN200820093473 U CN 200820093473U CN 201178510 Y CN201178510 Y CN 201178510Y
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Abstract
An optical power APC control circuit for a boosted optical transmitter comprises a laser diode integrated with an electroabsorption modulator and a monitor photodiode, wherein the common cathode of the three components is connected with a power voltage Vcc, and a current-voltage conversion circuit is used for converting a photocurrent into the voltage; an integral amplification circuit includes an integral capacitor and an operational amplifier, wherein the positive power supply of the integral amplification circuit is connected with a boost power voltage Vcc+x, and the negative power supply is earthed; and a voltage-controlled current drive circuit consisting of a transistor, wherein the base input terminal is connected with the output terminal of the integral amplification circuit, the collector of a PNP transistor or the emitter of an NPN transistor is connected with the anode pin of a laser diode, the emitter of the PNP transistor or the collector of the NPN transistor is connected with Vcc+x, and the anode of the electroabsorption modulator is connected with an RF signal. Accordingly, signal jitter of the entire optical power APC control circuit is uniform, so that the output optical power Po of the laser diode is balanced and uniform.
Description
Technical field
The utility model relates to optical transmitting set luminous power control APC circuit, relates in particular to the luminous power control APC circuit of the optical transmitting set after being used to boost.
Background technology
A light emitting power that important parameter is user's original definition of optical transmitting set, under the situation of aging and variations in temperature, its laser diode LD still will guarantee this transmitting power.The indicatrix slope of laser diode LD raises with temperature as time passes and descends, so the average light transmitting power must be set and keep to the drive circuit of laser diode LD.The laser of using more than 10G 40km is generally Electroabsorption Modulated Laser, generally all can integrated thermistor and TEC refrigerator.Therefore in this case, the variations in temperature of laser is in the several years scope, and what mainly need consideration is the aging of laser.The APC circuit guarantees the stability of Output optical power Po by the photoelectric current Im (Po is directly proportional with Output optical power) of comparison monitor photodiode PD and the reference value relevant with required luminous power of original definition.
And Electroabsorption Modulated Laser adopts electroabsorption modulator (EA-Modulator usually, be called for short MOD) and laser diode LD be integrated on the chip substrate, according to 10G MSA-XMD-TOSA (Transmitter Optical Sub-Assembly) protocol definition: electroabsorption modulator MOD, laser diode LD and monitor photodiode PD three palpus common cathode, link together in component internal, and draw by a pin.Typical Electroabsorption Modulated Laser drive circuit requires positive and negative two power supplys usually, and wherein, positive supply provides forward bias for laser diode LD, and negative supply provides reverse bias for electroabsorption modulator MOD and monitor photodiode PD.But present most system manufacturer all is reluctant to provide negative supply again, and this just requires module manufacturer must change the polarity of electroabsorption modulator MOD or whole laser is adopted the booster power power supply.In order to satisfy the 10G MSA-XMD-TOSA agreement interchangeability of high-speed light reflector, the processing of can only boosting to the power supply of Electroabsorption Modulated Laser MOD, after boosting, typical optical transmitting set luminous power control APC circuit is no longer suitable.
As shown in Figure 1, existing optical transmitting set luminous power control APC circuit comprises a laser diode LD 10 ' that is driven by laser LD modulation circuit 11 ', makes its outside Output optical power Po; Its luminous power control APC circuit comprises: a monitor photodiode PD12 ' receives a part of light signal of laser diode LD 10 ', in order to monitor the size of Output optical power Po, the light signal that receives is converted to the photoelectric current Im that is directly proportional with luminous power Po size, this photoelectric current converts voltage to through a current-voltage conversion circuit 13 ', after this voltage was compensated according to the variation of Output optical power Po by a compensating circuit 14 ', its output voltage was Vp.One reference voltage source 16 ' is set the anode input of a reference voltage Vset as a differential amplifier circuit 15 ' according to Output optical power Po size, the output end voltage Vp of compensating circuit 14 ' is then as its negative terminal input, after the difference amplification, its output voltage inputs to voltage controlled current drive circuit 17 ', this voltage controlled current drive circuit output is connected with LD10 ' negative electrode, regulate the size of its bias current Ibias with this, thereby reach the size of the Output optical power Po of control optical transmitting set, make it reach relatively stable.The luminous power control APC circuit of this structure, its complex structure, therefore less stable can not be applied in the 10G optical transmitting set luminous power control APC circuit that boosts after handling, and need improve it.
Summary of the invention
The utility model provides a kind of luminous power control APC circuit of the optical transmitting set after being used to boost, simple in structure, stable performance, and meet 10G MSA-XMD-TOSA protocol requirement.
For realizing above goal of the invention, the utility model adopts following technical scheme: a kind of luminous power control APC circuit of the optical transmitting set after being used to boost, comprise: by the integrated electroabsorption modulator MOD of laser diode LD, with a monitor photodiode PD, and three's common cathode connects power source voltage Vcc, wherein Vcc gets 3V or 5V, and the supervision photoelectric current of monitor photodiode PD is Im; Converting photoelectric current Im to voltage by the current-to-voltage converting circuit that an end is connected with the anode of monitor photodiode PD, the sample resistance R2 of other end ground connection constitutes is Vp; One integrating amplification circuit, comprise an integrating capacitor C31 and an operational amplifier, the positive supply of this integrating amplification circuit meets booster power voltage vcc+x, x＞1.5V, negative supply ground connection, the input of operational amplifier anode connects digital regulation resistance or the divider resistance that is subjected to external control, is used to be provided with a reference voltage Vset, its negative terminal input connects the anode of monitor photodiode PD, and described integrating capacitor C31 is connected between the negative terminal input Vp and output end vo of operational amplifier; With a voltage controlled current drive circuit that constitutes by PNP or NPN triode, its base input end connects the output end vo of described integrating amplification circuit, the emitter of the collector electrode of PNP triode or NPN triode is connected with laser diode LD anode pin, the collector electrode of the emitter of PNP pipe or NPN pipe meets described booster power voltage vcc+x, and the anode of electroabsorption modulator MOD meets radiofrequency signal RF.
The size of described integrating capacitor C31 is 0.01～10 μ F.
The resistance of described sample resistance R2 is 100～100000 ohm.
The resistance R 3 of connecting between the input of described voltage controlled current drive circuit and the output end vo of integrating amplification circuit, the base stage of PNP pipe is connected a capacitor C 1 with the base stage of its emitter or NPN pipe with its inter-collector, make described resistance R 3 and capacitor C 1 constitute the second order product parallel circuit.
The appearance value of described capacitor C 1 is 0.01～10uF, and the resistance of described resistance R 3 is 100～10,000 Ω.
Be connected a current-limiting resistance R1 between the output of described voltage controlled current drive circuit and the anode of laser diode LD.
The resistance of described current-limiting resistance R1 is 0～100 Ω.
Because in the above-mentioned optical transmitting set luminous power control APC circuit, this circuit is converted to photoelectric current Im with the light signal of monitor photodiode PD, convert the negative terminal input of voltage Vp to through ground connection sample resistance R2 as integrating circuit, one reference voltage Vset then imports as the anode of integrating circuit, integration through its integrating capacitor C31, can make the signal change equalization of overall optical power APC control circuit, and then make the Output optical power Po of laser diode LD steadily balanced.
Description of drawings
Fig. 1 represents the optical transmitting set luminous power control APC circuit theory diagrams of prior art.
Fig. 2 represents the utility model optical transmitting set luminous power control APC circuit theory diagrams.
Embodiment
Describe the utility model most preferred embodiment in detail below in conjunction with accompanying drawing.
The luminous power control APC circuit of the optical transmitting set after being used to as shown in Figure 2 boost, comprise: by laser diode LD 60 integrated electroabsorption modulator MOD70, with a monitor photodiode PD10, and three's common cathode connects power source voltage Vcc, wherein Vcc gets 3V or 5V, and the supervision photoelectric current of monitor photodiode PD10 is Im.Converting photoelectric current Im to voltage by the current-to-voltage converting circuit 20 that an end is connected with the anode of monitor photodiode PD10, the sample resistance R2 of other end ground connection constitutes is Vp.One integrating amplification circuit 30, comprise an integrating capacitor C31 and an operational amplifier 32, the positive supply of this integrating amplification circuit meets booster power voltage vcc+x, wherein, x＞1.5V, negative supply ground connection, the input of operational amplifier 32 anodes connects digital regulation resistance or the divider resistance 40 that is subjected to external control, be used to be provided with a reference voltage Vset, its negative terminal input connects the anode of monitor photodiode PD10, and described integrating capacitor C31 is connected between the negative terminal input Vp and its output end vo of operational amplifier 32; With a voltage controlled current drive circuit 50 that constitutes by PNP or NPN triode, its base input end connects the output end vo of described integrating amplification circuit 30, the emitter of the collector electrode of PNP triode or NPN triode is connected with laser diode LD 60 anode pins, the collector electrode of the emitter of PNP pipe or NPN pipe connects described booster power voltage vcc+x, and the anode of electroabsorption modulator MOD70 meets radiofrequency signal RF.The resistance R 3 of connecting between the output of the base input end of described voltage controlled current drive circuit 50 and integrating amplification circuit 30, the base stage of PNP pipe is connected a capacitor C 1 with the base stage of its emitter or NPN pipe with its inter-collector, make described resistance R 3 and capacitor C 1 constitute the second order product parallel circuit.Be connected a current-limiting resistance R1 between the anode of the output of described voltage controlled current drive circuit 50 and laser diode LD 60.
When the Output optical power PO of laser diode LD 60 increases, the photoelectric current Im of monitor photodiode PDl0 increases, increase by voltage to earth Vp behind the sample resistance R2, this moment, voltage Vp will be greater than the reference voltage Vset that is provided with, the output voltage V o of operational amplifier 32 reduces, emitter current Ie by voltage controlled current drive circuit 50 reduces, the bias current Ibias that arrives laser diode LD 60 through current-limiting resistance R1 reduces, its Output optical power Po also can reduce thereupon, the photoelectric current Im of monitor photodiode PD10 also can reduce, thereby reaches the purpose of the Output optical power Po size of regulating control laser diode LD 60.
The foregoing description, digital regulation resistance 40 can adopt the DS1848 of the U.S. letter company of the U.S. (Maxim/DallasSemiconductor), have the iic bus interface, be subjected to exterior PC or Single-chip Controlling, pass through iic bus, can change this digital regulation resistance resistance size, thereby different reference voltage Vset is set.Different reference voltage Vset makes the different luminous power Po of laser diode LD output.The operational amplifier 32 of integrating amplification circuit 30 can adopt the MIC7300 of MICREL company.The size of integrating capacitor C31 is 0.01～10 μ F; The resistance of described sample resistance R2 is 100～100000 ohm; The appearance value of described capacitor C 1 is 0.01～10uF; The resistance of described resistance R 3 is 100～10,000 Ω; The resistance of described current-limiting resistance R1 is 0～100 Ω.
Claims (7)
1, a kind of luminous power of the optical transmitting set after being used to boost control APC circuit is characterized in that, comprising:
By an integrated electroabsorption modulator MOD (70) of laser diode LD (60) and a monitor photodiode PD (10), and three's common cathode connects power source voltage Vcc, and wherein Vcc gets 3V or 5V, and the supervision photoelectric current of monitor photodiode PD (10) is Im;
Is Vp by the current-to-voltage converting circuit (20) that an end is connected with the anode of monitor photodiode PD (10), the sample resistance (R2) of other end ground connection constitutes with photoelectric current Im changing voltage;
One integrating amplification circuit (30), comprise an integrating capacitor (C31) and an operational amplifier (32), the positive supply of this integrating amplification circuit meets booster power voltage vcc+x, x＞1.5V, negative supply ground connection, the input of operational amplifier (32) anode connects digital regulation resistance or the divider resistance (40) that is subjected to external control, be used to be provided with a reference voltage Vset, its negative terminal input connects the anode of monitor photodiode PD (10), and described integrating capacitor (C31) is connected between the negative terminal input Vp and output end vo of operational amplifier (32); With
The one voltage controlled current drive circuit (50) that constitutes by PNP or NPN triode, its base input end connects the output end vo of described integrating amplification circuit (30), the emitter of the collector electrode of PNP triode or NPN triode is connected with laser diode LD (60) anode pin, the collector electrode of the emitter of PNP pipe or NPN pipe meets described booster power voltage vcc+x, and the anode of electroabsorption modulator MOD (70) meets radiofrequency signal RF.
2, the luminous power of the optical transmitting set after being used to boost according to claim 1 control APC circuit is characterized in that the size of described integrating capacitor (C31) is 0.01～10 μ F.
3, the luminous power of the optical transmitting set after being used to boost according to claim 2 control APC circuit is characterized in that the resistance of described sample resistance (R2) is 100～100000 ohm.
4, the luminous power of the optical transmitting set after being used to boost according to claim 3 control APC circuit, it is characterized in that, the resistance (R3) of connecting between the input of described voltage controlled current drive circuit (50) and the output end vo of integrating amplification circuit (30), the base stage of PNP pipe is connected an electric capacity (C1) with the base stage of its emitter or NPN pipe with its inter-collector, make described resistance (R3) and electric capacity (C1) constitute the second order product parallel circuit.
5, the luminous power of the optical transmitting set after being used to boost according to claim 4 control APC circuit is characterized in that the appearance value of described electric capacity (C1) is 0.01～10uF, and the resistance of described resistance (R3) is 100～10,000 Ω.
6, the luminous power of the optical transmitting set after being used to boost according to claim 1 control APC circuit is characterized in that, is connected a current-limiting resistance (R1) between the output of described voltage controlled current drive circuit (50) and the anode of laser diode LD (60).
7, the luminous power of the optical transmitting set after being used to boost according to claim 6 control APC circuit is characterized in that the resistance of described current-limiting resistance (R1) is 0～100 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200934730U CN201178510Y (en) | 2008-04-16 | 2008-04-16 | Optical power control APC circuit for voltage boosting driving light transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200934730U CN201178510Y (en) | 2008-04-16 | 2008-04-16 | Optical power control APC circuit for voltage boosting driving light transmitter |
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| CN201178510Y true CN201178510Y (en) | 2009-01-07 |
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| CNU2008200934730U Expired - Lifetime CN201178510Y (en) | 2008-04-16 | 2008-04-16 | Optical power control APC circuit for voltage boosting driving light transmitter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969715A (en) * | 2010-08-24 | 2011-02-09 | 河南电力试验研究院 | Light-emitting end low power consumption drive circuit in optical fiber transmission of electronic mutual inductor |
| CN102209410A (en) * | 2010-03-29 | 2011-10-05 | 深圳新飞通光电子技术有限公司 | External sudden automatic optical-power control circuit |
| CN101702489B (en) * | 2009-11-05 | 2011-12-28 | 中兴通讯股份有限公司 | Biasing circuit of electro-absorption modulated laser and debugging method thereof |
| CN102571003A (en) * | 2010-12-13 | 2012-07-11 | 深圳新飞通光电子技术有限公司 | Bias circuit of electroabsorption modulated laser |
| CN103314577A (en) * | 2011-01-17 | 2013-09-18 | 浜松光子学株式会社 | Solid imaging device |
| CN103762498A (en) * | 2014-01-26 | 2014-04-30 | 索尔思光电（成都）有限公司 | Circuit and method for reducing power consumption of TOSA |
| CN106300007A (en) * | 2016-10-13 | 2017-01-04 | 华北电力大学（保定） | The drive circuit for laser that the output of a kind of frequency power is stable |
| CN107168437A (en) * | 2017-07-04 | 2017-09-15 | 中国科学技术大学 | A kind of bipolar current source |
| CN107517536A (en) * | 2017-08-30 | 2017-12-26 | 深圳市新国都支付技术有限公司 | Breath light control circuit and electronic equipment |
| CN112909734A (en) * | 2019-12-03 | 2021-06-04 | 烽火通信科技股份有限公司 | High-speed laser driving circuit and high-speed laser system |
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2008
- 2008-04-16 CN CNU2008200934730U patent/CN201178510Y/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702489B (en) * | 2009-11-05 | 2011-12-28 | 中兴通讯股份有限公司 | Biasing circuit of electro-absorption modulated laser and debugging method thereof |
| US8718107B2 (en) | 2009-11-05 | 2014-05-06 | Zte Corporation | Bias circuit of electro-absorption modulated laser and calibration method thereof |
| CN102209410A (en) * | 2010-03-29 | 2011-10-05 | 深圳新飞通光电子技术有限公司 | External sudden automatic optical-power control circuit |
| CN102209410B (en) * | 2010-03-29 | 2015-01-07 | 深圳新飞通光电子技术有限公司 | External sudden automatic optical-power control circuit |
| CN101969715A (en) * | 2010-08-24 | 2011-02-09 | 河南电力试验研究院 | Light-emitting end low power consumption drive circuit in optical fiber transmission of electronic mutual inductor |
| CN102571003B (en) * | 2010-12-13 | 2014-09-24 | 深圳新飞通光电子技术有限公司 | Bias circuit of electroabsorption modulated laser |
| CN102571003A (en) * | 2010-12-13 | 2012-07-11 | 深圳新飞通光电子技术有限公司 | Bias circuit of electroabsorption modulated laser |
| CN103314577A (en) * | 2011-01-17 | 2013-09-18 | 浜松光子学株式会社 | Solid imaging device |
| CN103314577B (en) * | 2011-01-17 | 2016-10-12 | 浜松光子学株式会社 | Solid camera head |
| CN103762498A (en) * | 2014-01-26 | 2014-04-30 | 索尔思光电（成都）有限公司 | Circuit and method for reducing power consumption of TOSA |
| CN103762498B (en) * | 2014-01-26 | 2016-09-07 | 索尔思光电（成都）有限公司 | Reduce circuit and the method for power consumption of TOSA |
| CN106300007A (en) * | 2016-10-13 | 2017-01-04 | 华北电力大学（保定） | The drive circuit for laser that the output of a kind of frequency power is stable |
| CN107168437A (en) * | 2017-07-04 | 2017-09-15 | 中国科学技术大学 | A kind of bipolar current source |
| CN107168437B (en) * | 2017-07-04 | 2019-06-11 | 中国科学技术大学 | A kind of bipolar current source |
| CN107517536A (en) * | 2017-08-30 | 2017-12-26 | 深圳市新国都支付技术有限公司 | Breath light control circuit and electronic equipment |
| CN107517536B (en) * | 2017-08-30 | 2020-01-17 | 深圳市新国都支付技术有限公司 | Breathing lamp control circuit and electronic equipment |
| CN112909734A (en) * | 2019-12-03 | 2021-06-04 | 烽火通信科技股份有限公司 | High-speed laser driving circuit and high-speed laser system |
| CN112909734B (en) * | 2019-12-03 | 2022-05-20 | 烽火通信科技股份有限公司 | High-speed laser driving circuit and high-speed laser system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170523 Address after: 518101, Guangdong, Shenzhen Baoan District Xian two road COFCO Business Park 2, 1503 Patentee after: Shenzhen Apat Optoelectronics Components Co., Ltd. Address before: 518057 Guangdong city of Shenzhen province high tech Industrial Park in the Southern District of science and technology Feitong building twelve South Road Patentee before: Shenzhen Neo Photonic Technology Co., Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20170527 Address after: 518101, Guangdong, Shenzhen Baoan District Xian two road COFCO Business Park 2, 1503 Patentee after: Shenzhen Apat Optoelectronics Components Co., Ltd. Address before: 518057 Guangdong city of Shenzhen province high tech Industrial Park in the Southern District of science and technology Feitong building twelve South Road Patentee before: Shenzhen Neo Photonic Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090107 |