CN103346841A - Automatic control power circuit of optical transceiver - Google Patents
Automatic control power circuit of optical transceiver Download PDFInfo
- Publication number
- CN103346841A CN103346841A CN2013102663279A CN201310266327A CN103346841A CN 103346841 A CN103346841 A CN 103346841A CN 2013102663279 A CN2013102663279 A CN 2013102663279A CN 201310266327 A CN201310266327 A CN 201310266327A CN 103346841 A CN103346841 A CN 103346841A
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- photodiode
- laser diode
- operational amplifier
- automatic control
- optical transceiver
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Abstract
The invention discloses an automatic control power circuit of an optical transceiver. The automatic control power circuit of the optical transceiver comprises a driving circuit, a photodiode and a laser diode. The adjustment terminal of the driving circuit is connected with the laser diode. The feedback terminal of the driving circuit is connected with the photodiode. The laser diode is connected with the photodiode. The automatic control power circuit of the optical transceiver further comprises an operational amplifier which is connected with the photodiode and connected with the feedback terminal of the driving circuit. The operational amplifier has the characteristics of wide bandwidth, high slew rate and abundant steady-state currents, therefore, a driving circuit and a driver designed in the photodiode in a discrete mode are replaced, and automatic control over optical power is realized.
Description
Technical field
The present invention relates to the computer network transmission technology, specifically refer to the automatic control power circuit of optical transceiver.
Background technology
The signal of telecommunication that will carry information during the basic function of optical fiber communication optical sender is converted to light signal, and light signal is sent in the optical fiber, and light source is the Primary Component in the optical fiber telecommunications system, and the development of Fibre Optical Communication Technology and the development of light source technology are undivided.Semiconductor laser is the perfect light source of High Speed Modulation, and semiconductor laser is very sensitive to variation of temperature, and the aging of variation of temperature and device brought unsteadiness to laser, thereby power output is changed a lot.For ensureing normal, unobstructed communication, the luminous power of optical sender should remain on a constant value as far as possible.
Summary of the invention
The present invention solves problems such as laser luminous power stability is low by the automatic control power circuit of optical transceiver is set, and reaches and improves the laser purpose in useful life.
Purpose of the present invention reaches by the following technical programs:
The present invention includes drive circuit, photodiode and laser diode, the adjustment end of described drive circuit links to each other with laser diode, the feedback end of drive circuit links to each other with photodiode, laser diode links to each other with photodiode, also comprise the operational amplifier that links to each other with photodiode, described operational amplifier links to each other with the feedback end of drive circuit.At first set the luminous power of laser diode by operational amplifier, thereby determine to flow through the electric current of laser diode, laser diode is mapped to a certain proportion of illumination on the photodiode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, the laser diode luminous power is in the power bracket of setting, and lasing fluorescence power is the power of setting to laser diode with regard to thinking laser;
If flowing through the electric current of laser diode increases, the laser diode luminous power will increase, the luminous power that shines photodiode will increase, thereby the electric current that feeds back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, will reduce to flow through the electric current of laser diode, thereby allow the laser diode luminous power reduce, the luminous power that shines photodiode also can reduce, the electric current that feeds back to drive circuit also can reduce, and the electric current of giving laser diode up to operational amplifier is till the set point;
Same, if the luminous power of laser diode descends, the luminous power that photodiode receives also can reduce, and the electric current that feeds back to operational amplifier can reduce, and operational amplifier will increase the electric current that flows through laser diode and reach set point.The operational amplifier that adopts has the characteristic of wide bandwidth, high pressure Slew Rate and abundant steady-state current, has replaced discrete designed driver in the photodiode, realizes the automatic control to luminous power.
Further, described operational amplifier is built-in with charge pump.When using the operational amplifier of built-in charge pump, need not negative supply, improved the flexibility that the driver of photodiode is connected with other circuit.
Further, as preferably, described photodiode is monitor photo-diode backlight, can weigh the stability of Output optical power under the regulation condition of work.
Further, as preferably, described operational amplifier is AD8037 type clamper amplifier, and the clamper amplifier circuit can be with the frequency work of the highest 10MHz, and total propagation delay is 15ns.Can adjust output voltage and electric current, to adapt to different application by changing gain or clamp voltage.
The present invention compared with prior art, have following advantage and a beneficial effect:
The operational amplifier that 1 the present invention adopts has the characteristic of wide bandwidth, high pressure Slew Rate and abundant steady-state current, has replaced discrete designed drive circuit and driver in the photodiode, realizes the automatic control to luminous power.
2 operational amplifiers of the present invention are built-in with charge pump, when using the operational amplifier of built-in charge pump, need not negative supply, and improved the flexibility that the driver of photodiode is connected with other circuit.
Description of drawings
Fig. 1 is circuit block diagram of the present invention.
Embodiment
Embodiment 1
As shown in Figure 1, present embodiment comprises drive circuit, photodiode and laser diode, the adjustment end of described drive circuit links to each other with laser diode, the feedback end of drive circuit links to each other with photodiode, laser diode links to each other with photodiode, also comprise the operational amplifier that links to each other with photodiode, described operational amplifier links to each other with the feedback end of drive circuit.At first set the luminous power of laser diode by operational amplifier, thereby determine to flow through the electric current of laser diode, laser diode is mapped to a certain proportion of illumination on the photodiode simultaneously, photodiode will produce corresponding electric current, electric current returns operational amplifier, the laser diode luminous power is in the power bracket of setting, and lasing fluorescence power is the power of setting to laser diode with regard to thinking laser;
If flowing through the electric current of laser diode increases, the laser diode luminous power will increase, the luminous power that shines photodiode will increase, thereby the electric current that feeds back to operational amplifier will increase, at this moment operational amplifier can think that the luminous power of laser diode is excessive, will reduce to flow through the electric current of laser diode, thereby allow the laser diode luminous power reduce, the luminous power that shines photodiode also can reduce, the electric current that feeds back to drive circuit also can reduce, and the electric current of giving laser diode up to operational amplifier is till the set point;
Same, if the luminous power of laser diode descends, the luminous power that photodiode receives also can reduce, and the electric current that feeds back to operational amplifier can reduce, and operational amplifier will increase the electric current that flows through laser diode and reach set point.The operational amplifier that adopts has the characteristic of wide bandwidth, high pressure Slew Rate and abundant steady-state current, has replaced discrete designed drive circuit and driver in the photodiode, realizes the automatic control to luminous power.
Embodiment 2
As shown in Figure 1, present embodiment is on the basis of embodiment 1, and described operational amplifier is built-in with charge pump, when using the operational amplifier of built-in charge pump, need not negative supply, and improved the flexibility that the driver of photodiode is connected with other circuit.
As preferably, described photodiode is monitor photo-diode backlight, can weigh the stability of Output optical power under the regulation condition of work.
As preferably, described operational amplifier is AD8037 type clamper amplifier.Clamper amplifier can be with the frequency work of the highest 10MHz, and total propagation delay is 15ns.Can adjust output voltage and electric current, to adapt to different application by changing gain or clamp voltage.
Claims (4)
1. the automatic control power circuit of optical transceiver, comprise drive circuit, photodiode and laser diode, the adjustment end of described drive circuit links to each other with laser diode, the feedback end of drive circuit links to each other with photodiode, laser diode links to each other with photodiode, it is characterized in that: also comprise the operational amplifier that links to each other with photodiode, described operational amplifier links to each other with the feedback end of drive circuit.
2. the automatic control power circuit of optical transceiver according to claim 1, it is characterized in that: described operational amplifier is built-in with charge pump.
3. the automatic control power circuit of optical transceiver according to claim 2, it is characterized in that: described photodiode is monitor photo-diode backlight.
4. according to the automatic control power circuit of the described optical transceiver of claim 1～3, it is characterized in that: described operational amplifier is AD8037.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102663279A CN103346841A (en) | 2013-06-28 | 2013-06-28 | Automatic control power circuit of optical transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102663279A CN103346841A (en) | 2013-06-28 | 2013-06-28 | Automatic control power circuit of optical transceiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103346841A true CN103346841A (en) | 2013-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102663279A Pending CN103346841A (en) | 2013-06-28 | 2013-06-28 | Automatic control power circuit of optical transceiver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753604A (en) * | 2013-12-27 | 2015-07-01 | 富士通株式会社 | Optical Communication System, Method For Controlling Optical Communication, And Optical Transmitter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419722A (en) * | 2000-02-04 | 2003-05-21 | 斯特拉托斯光波公司 | Automatic power control and laser sloep efficiency normalizing circuit |
| CN101141049A (en) * | 2007-05-23 | 2008-03-12 | 中兴通讯股份有限公司 | Laser automatic optical power control circuit |
| US7443897B2 (en) * | 2006-06-05 | 2008-10-28 | Sumitomo Electric Industries, Ltd. | Method for distinguish failure modes in an APC circuit and an optical transmitter using the same |
| CN201549765U (en) * | 2009-12-02 | 2010-08-11 | 天津光电通信技术有限公司 | Semiconductor laser drive module |
| US20120051379A1 (en) * | 2010-08-27 | 2012-03-01 | Chih-Yang Wang | Automatic power control (apc) loop for adjusting the bias current of a laser diode |
| CN103051388A (en) * | 2012-12-31 | 2013-04-17 | 武汉电信器件有限公司 | Device and method for optimizing burst mode transmission light module automatic light power control |
-
2013
- 2013-06-28 CN CN2013102663279A patent/CN103346841A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419722A (en) * | 2000-02-04 | 2003-05-21 | 斯特拉托斯光波公司 | Automatic power control and laser sloep efficiency normalizing circuit |
| US7443897B2 (en) * | 2006-06-05 | 2008-10-28 | Sumitomo Electric Industries, Ltd. | Method for distinguish failure modes in an APC circuit and an optical transmitter using the same |
| CN101141049A (en) * | 2007-05-23 | 2008-03-12 | 中兴通讯股份有限公司 | Laser automatic optical power control circuit |
| CN201549765U (en) * | 2009-12-02 | 2010-08-11 | 天津光电通信技术有限公司 | Semiconductor laser drive module |
| US20120051379A1 (en) * | 2010-08-27 | 2012-03-01 | Chih-Yang Wang | Automatic power control (apc) loop for adjusting the bias current of a laser diode |
| CN103051388A (en) * | 2012-12-31 | 2013-04-17 | 武汉电信器件有限公司 | Device and method for optimizing burst mode transmission light module automatic light power control |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753604A (en) * | 2013-12-27 | 2015-07-01 | 富士通株式会社 | Optical Communication System, Method For Controlling Optical Communication, And Optical Transmitter |
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Application publication date: 20131009 |