CN203851146U - Bursting type low-jitter light module - Google Patents
Bursting type low-jitter light module Download PDFInfo
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- CN203851146U CN203851146U CN201320717066.3U CN201320717066U CN203851146U CN 203851146 U CN203851146 U CN 203851146U CN 201320717066 U CN201320717066 U CN 201320717066U CN 203851146 U CN203851146 U CN 203851146U
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- 230000009172 bursting Effects 0.000 title abstract 6
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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Abstract
The utility model discloses a burst mode type low-jitter optical module, comprising a light transmitting module and a light receiving module. An input terminal of a single-terminal variational difference unit of the light transmitting module is connected with bursting signals of external input. An input terminal of a single-terminal variational difference unit of the light transmitting module is connected with bursting signals of external input. An output terminal of the light controlling unit is connected with a control terminal of the laser driving unit through the light controlling unit. An output terminal of the laser of the light receiving module is relative to an input terminal of a laser detector and an output terminal of the laser detector is connected with an input terminal of a front-putting unit. One output terminal of the front-putting unit is directly connected with an input terminal of a decision unit, and the other terminal of the front-putting unit is connected with the other input terminal of the decision unit through a peak value detection unit. An output terminal of the decision unit output the bursting type signals outwardly. According to the bursting type low-jitter light module, the bursting signals can be directly transformed into light signals for transmission, and transmission jitter of the signals is reduced.
Description
Technical field
The utility model relates to a kind of optical module, is specifically related to a kind of burst type low jitter optical module.
Background technology
At some specific areas, need to transmit with optical fiber the burst digital signal of 0～40Mbps bandwidth, sort signal has uncertain factor, most of the time is low level, when only having only a few, there will be one or several high level, sort signal is that the clock of synchronizeing with signal is not provided, and this signal requires highlyer to shake in addition, requires shake to be less than or equal to 3ns at the rising edge of pulse.
Optical module is mainly divided into high-speed optical module and low speed optical module at present.Present low speed optical module on the market mainly concentrates within the scope of 0～2Mbps, only has indivedual producers can accomplish 0～10Mbps, still, for the application of some special dimensions, needs wider transmission bandwidth, and these low speed optical modules cannot meet the demands.High-speed optical module generally all needs digital signal process 8B/10B encoding and decoding to reduce signal DC characteristic, because the signal of required transmission does not provide synchronised clock, as carried out 8B/10B encoding and decoding with asynchronous clock sampling, will certainly increase signal jitter, adopt on the market at present high-speed optical module to transmit 0～40Mbps signal and be asynchronous-sampling method, its shake generally, more than 8ns, is therefore transmitted 0～40Mbps signal with high-speed optical module and also cannot be met the demands.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of burst type low jitter optical module, and it can directly become light signal by burst and transmits, to reduce signal transmission shake.
For addressing the above problem, the utility model is achieved through the following technical solutions:
A kind of burst type low jitter optical module, comprises light emission module and Optical Receivers; Wherein
Described light emission module is mainly by single-ended variation subdivision, laser driver element, optical control element and laser constitution; The input of single-ended variation subdivision connects the burst type signal of outside input, the input of the output connecting laser driver element of single-ended variation subdivision, the output of laser driver element connects the input of optical control element, and the output of optical control element is through the control end of optical control element connecting laser driver element;
Described Optical Receivers is mainly made up of laser detector, front unit, peak detection unit and the decision unit put; The output of laser is relative with the input of laser detector, and the output of laser detector is put the input of unit before connecting; Before put unit an output directly connect an input of decision unit, front another output of putting unit connects another input of decision unit through peak detection unit; The output of decision unit is outwards exported burst type signal.
In such scheme, described decision unit is high-speed comparator.
In such scheme, before described, put unit and comprise automatic gain control circuit and current-to-voltage converting circuit, wherein the input of automatic gain control circuit connects the input of laser detector, the output of automatic gain control circuit connects the input of current-to-voltage converting circuit, and the output of current-to-voltage converting circuit connects respectively peak detection unit and decision unit.
The utility model is mainly used in 0～40Mbps and the burst digital data transmission of high bandwidth more, common application comprises clock signal, pulse signal, burst control signal, these signals are because the cycle is uncertain, have very strong DC characteristic, require very high to shake, cannot directly transmit with traditional optical module, can directly transmit these signals by the utility model.
Compared with prior art, advantage of the present utility model is: 1, solved 0～40Mbps bandwidth and more the burst of high bandwidth transmission problem, without 8B/10B encoding and decoding; 2, transmission shake is less than 3ns, delay is less; 3, this module is easy to realization, cost is low.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of burst type low jitter optical module.
Embodiment
A kind of burst type low jitter optical module, comprises light emission module and Optical Receivers.As shown in Figure 1.
Described light emission module is mainly by single-ended variation subdivision, laser driver element, optical control element and laser constitution.The input of single-ended variation subdivision connects the burst type signal of outside input, the input of the output connecting laser driver element of single-ended variation subdivision, the output of laser driver element connects the input of optical control element, and the output of optical control element is through the control end of optical control element connecting laser driver element.In order to improve signal rising edge and trailing edge time, the laser that the utility model preferred embodiment adopts drives as differential driving mode, and the burst type signal of outside input is LVTTL signal, need to LVTTL single-ended signal be become to differential signal with single-ended variation subdivision and carry out drive laser.
Described Optical Receivers is mainly made up of laser detector, front unit, peak detection unit and the decision unit put.The output of laser is relative with the input of laser detector, and the output of laser detector is put the input of unit before connecting.Before put unit an output directly connect an input of decision unit, front another output of putting unit connects another input of decision unit through peak detection unit.The output of decision unit is outwards exported burst type signal.In the utility model preferred embodiment, before described, put unit and comprise automatic gain control circuit and current-to-voltage converting circuit, wherein the input of automatic gain control circuit connects the input of laser detector, the output of automatic gain control circuit connects the input of current-to-voltage converting circuit, and the output of current-to-voltage converting circuit connects respectively peak detection unit and decision unit.Described decision unit is high-speed comparator.
0～40Mbps burst of outside input is LVTTL level, through single-ended variation subdivision, signal is become to the differential signal of single spin-echo.Differential signal is luminous through laser drive unit drives laser, and in the time that the signal of outside input is low level (representative value is 0V), laser shutdown is not luminous; In the time that the signal of outside input is high level (representative value is+3.3V), laser is luminous.The electric current of the Pd output of optical control element detection laser, increases or reduces the drive current of drive circuit for laser, to reach light-operated object according to the size of current detecting.Before put unit the weak current of laser detector output amplified, the electric current of laser detector output is become to Voltage-output.Peak detection unit is put the voltage peak of unit output before detecting, and does suitable maintenance, provides judgement foundation to decision unit.Decision unit will front be put the voltage of unit output and the voltage of peak detection unit output compares, output LVTTL level signal.
The operation method of a kind of burst type low jitter optical module that above-mentioned optical module is realized, comprises the steps:
(1) signal that single-ended variation subdivision is LVTTL level by the burst type signal of outside input becomes the differential signal of single spin-echo.
(2) differential signal is luminous through laser drive unit drives laser.In the time that the signal of outside input is low level (representative value is 0V), laser driver element sends cut-off signals to laser, controls laser shutdown.In the time that the signal of outside input is high level (representative value is+3.3V), laser driver element sends luminous signal to laser, controls laser luminous.Generally be more than or equal to+2V of high level and be less than or equal to+3.6V, low level is generally less than equal+0.8V and is more than or equal to 0V.
(3) output current of optical control element detection laser, and regulate the drive current of laser according to the size of this output current, make the drive current of laser as far as possible stable, thereby reach the effect that makes optical output power of laser stable.
(4) laser detector receives the light signal that laser sends in real time, and the light signal receiving is converted into before current signal is sent into and is put in unit.
(5) the front unit of putting amplifies the low current signal of laser detector output, and is transformed into voltage signal output.Before put inside, unit and there is automatic gain control (AGC) circuit and current/voltage conversion (I/V) circuit.Agc circuit effectively regulates gain amplifier.Current/voltage conversion (I/V) circuit completes I/V to be changed, and the current transitions of laser detector output is become to voltage signal output.
(6) peak detection unit is put the peak value of unit output voltage signal before detecting, and this crest voltage is done and gives follow-up decision unit after suitable maintenance as with reference to voltage signal.
(7) reference voltage signal that decision unit is exported the voltage signal of front putting unit output and peak detection unit compares, and outwards exports the signal that burst type signal is LVTTL level.
Claims (3)
1. burst type low jitter optical module, comprises light emission module and Optical Receivers; It is characterized in that:
Described light emission module is mainly by single-ended variation subdivision, laser driver element, optical control element and laser constitution; The input of single-ended variation subdivision connects the burst type signal of outside input, the input of the output connecting laser driver element of single-ended variation subdivision, the output of laser driver element connects the input of optical control element, and the output of optical control element is through the control end of optical control element connecting laser driver element;
Described Optical Receivers is mainly made up of laser detector, front unit, peak detection unit and the decision unit put; The output of laser is relative with the input of laser detector, and the output of laser detector is put the input of unit before connecting; Before put unit an output directly connect an input of decision unit, front another output of putting unit connects another input of decision unit through peak detection unit; The output of decision unit is outwards exported burst type signal.
2. burst type low jitter optical module according to claim 1, is characterized in that: described decision unit is high-speed comparator.
3. burst type low jitter optical module according to claim 1, it is characterized in that: before described, put unit and comprise automatic gain control circuit and current-to-voltage converting circuit, wherein the input of automatic gain control circuit connects the input of laser detector, the output of automatic gain control circuit connects the input of current-to-voltage converting circuit, and the output of current-to-voltage converting circuit connects respectively peak detection unit and decision unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320717066.3U CN203851146U (en) | 2013-11-14 | 2013-11-14 | Bursting type low-jitter light module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320717066.3U CN203851146U (en) | 2013-11-14 | 2013-11-14 | Bursting type low-jitter light module |
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| Publication Number | Publication Date |
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| CN203851146U true CN203851146U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320717066.3U Expired - Lifetime CN203851146U (en) | 2013-11-14 | 2013-11-14 | Bursting type low-jitter light module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595486A (en) * | 2013-11-14 | 2014-02-19 | 中国电子科技集团公司第三十四研究所 | Burst-mode low-jitter optical transceiver module and operation method thereof |
-
2013
- 2013-11-14 CN CN201320717066.3U patent/CN203851146U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595486A (en) * | 2013-11-14 | 2014-02-19 | 中国电子科技集团公司第三十四研究所 | Burst-mode low-jitter optical transceiver module and operation method thereof |
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Granted publication date: 20140924 |
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| CX01 | Expiry of patent term |