CN1567802A - Burst type optical wavelength shifter - Google Patents
Burst type optical wavelength shifter Download PDFInfo
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- CN1567802A CN1567802A CNA031294715A CN03129471A CN1567802A CN 1567802 A CN1567802 A CN 1567802A CN A031294715 A CNA031294715 A CN A031294715A CN 03129471 A CN03129471 A CN 03129471A CN 1567802 A CN1567802 A CN 1567802A
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Abstract
The invention relates to a burst optical wavelength converter, a burst optical wavelength converter making regeneration and wavelength conversion on optical burst signal, mainly using photoelectric detector to convert burst optical pulse signal to burst electric pulse signal; using DC coupled preamplifier to make lossless amplification on the electric pulse signal outputted by the photoelectric detector; using burst electric pulse signal shaping and recovery circuit to make shaping and recovery on the amplified burst electric pulse signal; and using optical burst transmitting device including DC coupled driving circuit and laser, etc, to output the regenerated signal after processed by shaping and recovery. It can be applied to the communication networks in need of realizing burst optical/electric/optical conversion on various optical burst conditions, such as optical burst exchange network, optical packet exchange network, wave division multiplex passive optical network, etc.
Description
One, technical field:
The present invention relates to the optical communication technique field, particularly in the optical communication nets such as light backbone network, light metropolitan area network and optical access network to regenerate burst type optical wavelength changer with wavelength conversion of optical burst signal.
Two, background technology:
Along with the development of present information society and communication network, whole communication network loaded information capacity is increasing, and is also more and more higher to the requirement of whole communication network.At present in communication network, optical fiber transmission technique is almost all adopted in the bulky information transmission, utilizes wavelength-division multiplex technique (WDM) single fiber transmission rate can reach the magnitude of tens of Tb/s, solves the technical problem of message transmission substantially; But at exchange and routing node equipment, remain and rely on the electric treatment technology fully, more and more become the bottleneck of whole communication network; Therefore, route and function of exchange are shifted to the light territory from present traditional electric territory, to solve " electronic bottleneck " problem based on the electric treatment technology, this will be the development trend of communication network in future.Realize the handshaking function is shifted to the light territory by electric territory, a problem that at first will face is to change the situation that can only adopt successive bits stream in the present fiber-optic communications traffic and adopt the burst type optical signal transmission.In traditional optical fiber transmission technique, for the ease of realizing stable reception and Clock Extraction, thereby realize that high performance bit stream receives and recovers, and has adopted channel coding technology.With nonequilibrium, burst type information flow at random, become " 0 ", " 1 " sign indicating number balance, stable, continuous bit stream by channel coding technology, this bit stream can only be to be used for the stable optical fiber link transmission of point-to-point.If realize exchange and routing function in the light territory, this continuous, stable optical bitstream transmission means is no longer suitable, and must be the optical bitstream transmission means of burst.Need to adopt the Another application field of light burst transfer, be all kinds of optical access network systems that adopt tdma, in these systems when a plurality of smooth far-ends (OUN) when same smooth local side (OLT) carries out optical communication, different far-ends must be distributed in send in the different time upward signal just can make whole system normally, operation stably, therefore, far-end must be that mode with one by one light burst packets sends to local side.Under above-mentioned light burst operational environment, when light signal needs carry out wavelength conversion because of transmission quality deterioration, wave length routing or because of aspects such as costs, just need burst type optical wavelength changer (burst mode transponder).
From document and the patent request for information of having delivered, also do not see the report data and the patent application of burst type optical wavelength changer (bursttransponder) at present.
Three, summary of the invention:
Technical problem to be solved by this invention is: at the blank of prior art, design and a kind ofly can satisfy the burst type optical wavelength changer of finishing burst type optical wavelength conversion function under the light burst operational environment.
The present invention is achieved like this:
Burst type optical wavelength changer of the present invention comprises light burst receiving system and light burst dispensing device, it is characterized in that: described light burst receiving system comprises photoelectric detector, direct-current coupling preamplifier, burst electric impulse signal shaping and recovery circuit;
Photoelectric detector changes the burst type light pulse signal into the burst type electric impulse signal;
The direct-current coupling preamplifier with the amplification of faint burst type electric impulse signal of photoelectric detector output with losing;
Burst electric impulse signal shaping and recovery circuit is carried out shaping with the burst electric impulse signal that amplifies and is recovered;
Described light burst dispensing device comprises the direct-current coupling drive circuit of the burst light pulse signal that receives the output of light burst receiving system, link to each other, produce the laser of burst light pulse signal with direct-current coupling drive circuit output, make the laser bias circuit of laser operate as normal.
According to the present invention, under light burst operational environment, because transmission quality deterioration, wave length routing or, can amplification and change its wavelength of burst luminous signal that enrich spectrum component will be had with losing because of factors such as costs.
Described light burst receiving system also comprises quick clock extracting circuit, decision circuit;
Quick clock extracting circuit, from the pulse signal after the shaping recovery of input, the rapid extraction clock signal;
Decision circuit as unsentenced input signal, according to the clock signal of input, is adjudicated the pulse signal after the shaping recovery to the pulse signal after the shaping recovery.
According to the present invention, can carry out 3R (amplification again, shaping again, timing again) to burst luminous signal and handle.
Described light burst dispensing device also comprises the wavelength control functional module that laser transmission wavelength is controlled.
According to the present invention, can send the burst luminous signal of specific wavelength as required.
Described light burst dispensing device also comprises and switching off control circuit that the laser bias circuit links to each other.
According to the present invention, can control the shutoff or the operate as normal of laser.
Four, description of drawings:
Accompanying drawing 1 theory diagram of the present invention.
The theory diagram of accompanying drawing 2 one embodiment of the invention.
Five, embodiment:
For understanding technical scheme of the present invention better, be further described below in conjunction with drawings and Examples.As shown in Figure 1, burst type optical wavelength changer of the present invention comprises photoelectric detector, direct-current coupling preamplifier, burst electric impulse signal shaping and recovery circuit, quick clock extracting circuit, decision circuit, direct-current coupling drive circuit, laser, laser bias circuit, wavelength control module.Burst type optical transducer for not needing to reset time judgement does not comprise fast bit clock extracting circuit and decision circuit.Do not need the wavelength control module for the burst type optical transducer that does not need specific transmission wavelength.
The burst type light signal at first enters photoelectric detector, changes faint electric burst type pulse signal into; Faint electric burst type pulse signal direct-current coupling to preamplifier by photoelectric detector output amplifies; By burst electric impulse signal shaping and recovery circuit signal is carried out shaping by the signal after the amplification of direct-current coupling preamplifier and recover to handle, form more satisfactory electric impulse signal; The signal that recovers through shaping is divided into two-way, and one tunnel input fast bit clock extracting circuit is realized the rapid extraction recovery of clock signal; One the tunnel is input to the input of decision circuit, as unsentenced data-signal, the fast bit clock extracting circuit is extracted the clock signal of recovering out is input to the judgement clock as the judgement clock input; From the signal of decision circuit output is the burst light pulse signal; To be input to the direct-current coupling drive circuit through the data-signal after the decision circuit judgement, for the burst type optical module that does not need to reset time judgement, do not need fast bit clock extracting circuit and decision circuit, and the shaping restoring signal of directly being exported by burst electric impulse signal shaping and recovery circuit is input to the direct-current coupling drive circuit; Produce new burst luminous signal by direct-current coupling drive circuit drive laser again, realized burst type optical wavelength changer function.The wavelength control module mainly is to finish the control of laser transmission wavelength when sending optical burst signal again, makes it to satisfy system requirements.For the occasion that does not need to send specific wavelength, can not need the wavelength control module.
Accompanying drawing 2 is embodiment.As shown in Figure 2, the burst type light signal is input to photoelectric detector, changes faint electric burst type pulse signal into; The operating current of photoelectric detector is provided by feedback bias circuit, utilizes feedback to provide biasing can effectively reduce the noise of photoelectric detector.Faint electric burst type pulse signal by photoelectric detector output amplifies the faint electric burst type pulse signal amplitude of carrying out through the direct-current coupling preamplifier, so that shaping recovers to handle.Connect differential circuit, amplitude limiting amplifier circuit, Si Mite circuits for triggering behind the direct-current coupling preamplifier, differential circuit, amplitude limiting amplifier circuit, Si Mite circuits for triggering constitute burst electric impulse signal shaping and recovery circuit together, electric impulse signal to the output of direct-current coupling preamplifier carries out the shaping processing, forms shape and the reasonable impulse waveform of performance.The signal of Si Mite circuits for triggering output be through the burst electric impulse signal shaping and recovery circuit that the amplification of direct-current coupling preamplifier, differential circuit, amplitude limiting amplifier circuit, Si Mite circuits for triggering constitute amplify again, the 2R signal handled of shaping again.The 2R signal is divided into two-way output, and one the tunnel is used for connecting the fast bit clock extracting circuit, realizes Clock Extraction fast; One the tunnel as unsentenced data-signal, does suitable delay through delayer.Delayer is done suitable delay to unsentenced signal, its effect is because the fast bit clock extracting circuit needs certain response time, just can extract the stable clock signal, if the band decision signal is directly inputted to the data decision circuit, the judgement clock is also unstable, causes signal decision to make mistakes easily and loses code word.Treat decision signal and do suitably to postpone, to wait for that being input to decision circuit behind the stable clock signal again can effectively reduce code word and lose.Signal through decision circuit output just is the 3R regenerated signal.Decision circuit is exported the 3R regenerated signal produces burst through direct-current coupling drive circuit rear drive laser modulating light pulse signal.Present embodiment adopts the temperature control Wavelength control circuit to control the working temperature of laser, to realize sending the stable of wavelength, also can adopt wavelength locker or other wavelength control modes.The laser bias circuit provides the bias current of operate as normal for laser, so that the on-the-job satisfaction systematic function requirement of laser.The bias current that switches off control circuit and provide for the laser operate as normal by control laser bias circuit can be realized effective shutoff of laser when no signal sends.
Claims (7)
1, a kind of burst type optical wavelength changer comprises light burst receiving system and light burst dispensing device, it is characterized in that: described light burst receiving system comprises photoelectric detector, direct-current coupling preamplifier, burst electric impulse signal shaping and recovery circuit;
Photoelectric detector changes the burst type light pulse signal into the burst type electric impulse signal;
The direct-current coupling preamplifier with the amplification of faint burst type electric impulse signal of photoelectric detector output with losing;
Burst electric impulse signal shaping and recovery circuit is carried out shaping with the burst electric impulse signal that amplifies and is recovered;
Described light burst dispensing device comprises the direct-current coupling drive circuit of the burst light pulse signal that receives the output of light burst receiving system, link to each other, produce the laser of burst light pulse signal with direct-current coupling drive circuit output, make the laser bias circuit of laser operate as normal.
2, burst type optical wavelength changer according to claim 1 is characterized in that: described light burst receiving system also comprises quick clock extracting circuit, decision circuit;
Quick clock extracting circuit, from the pulse signal after the shaping recovery of input, the rapid extraction clock signal;
Decision circuit as unsentenced input signal, according to the clock signal of input, is adjudicated the pulse signal after the shaping recovery to the pulse signal after the shaping recovery.
3, burst type optical wavelength changer according to claim 2 is characterized in that: described light burst receiving system also comprises the delayer of unsentenced input signal being made to output to after the suitable delay decision circuit.
4, burst type optical wavelength changer according to claim 2 is characterized in that: described light burst receiving system also comprises the feedback bias circuit that links to each other with the direct-current coupling preamplifier, operating current is provided to photoelectric detector.
5, burst type optical wavelength changer according to claim 1 is characterized in that: described light burst dispensing device also comprises the wavelength control functional module that laser transmission wavelength is controlled.
6, the burst type optical wavelength changer one of described according to claim 1～5, it is characterized in that: described light burst dispensing device also comprises and switching off control circuit that the laser bias circuit links to each other.
7, burst type optical wavelength changer according to claim 6 is characterized in that: described burst electric impulse signal shaping and recovery circuit can be made of differential circuit, amplitude limiting amplifier circuit, Si Mite circuits for triggering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031294715A CN1567802A (en) | 2003-06-24 | 2003-06-24 | Burst type optical wavelength shifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031294715A CN1567802A (en) | 2003-06-24 | 2003-06-24 | Burst type optical wavelength shifter |
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| Publication Number | Publication Date |
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| CN1567802A true CN1567802A (en) | 2005-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA031294715A Pending CN1567802A (en) | 2003-06-24 | 2003-06-24 | Burst type optical wavelength shifter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1941673A (en) * | 2005-09-26 | 2007-04-04 | 阿尔卡特公司 | Method for amplifying a time-varying optical signal and optical amplification unit |
-
2003
- 2003-06-24 CN CNA031294715A patent/CN1567802A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1941673A (en) * | 2005-09-26 | 2007-04-04 | 阿尔卡特公司 | Method for amplifying a time-varying optical signal and optical amplification unit |
| CN1941673B (en) * | 2005-09-26 | 2014-05-07 | 阿尔卡特公司 | Method for amplifying a time-varying optical signal and optical amplification unit |
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