CN102156376A - Reflective polarization maintaining all-fiber optical pulse coder - Google Patents
Reflective polarization maintaining all-fiber optical pulse coder Download PDFInfo
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- CN102156376A CN102156376A CN 201110060664 CN201110060664A CN102156376A CN 102156376 A CN102156376 A CN 102156376A CN 201110060664 CN201110060664 CN 201110060664 CN 201110060664 A CN201110060664 A CN 201110060664A CN 102156376 A CN102156376 A CN 102156376A
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Abstract
The invention provides a reflective polarization maintaining all-fiber optical pulse coder. After optical pulse signals in the coder are input into a circulator, the optical pulse signals are divided into N paths of pulses through a 1*N fiber coupler, each path of fibers of the 1*N fiber coupler is sequentially connected with a variable fiber attenuator, a variable fiber delay line and a Faraday fiber polarization rotating mirror respectively; and after the N paths of pulses pass through the variable fiber attenuator and the variable fiber delay line, the pulses are reflected by the Faraday fiber polarization rotating mirror and returned and synthesized into a coded optical pulse sequence consisting N pulses. The amplitude of a random sub pulse in the coded optical pulse sequence is adjusted by continuous attenuation of the variable fiber attenuator, and the interval between the adjacent sub pulses is roughly controlled by the total length of the fibers of a fiber device of each path and continuously fine adjusted by the variable fiber delay line. The coded optical pulse sequence with consistent polarization states of all sub pulses and adjustable amplitude of the sub pulses and interval between the adjacent pulses can be produced, the structure is simple, and the manufacturing cost is low.
Description
Technical field
The invention belongs to the full optical fiber optical optical pulser technical field in the laser instrument, be specifically related to a kind of reflection type polarization and keep the full optical fiber optical optical pulse encoder.
Background technology
At present, known optical fiber pulse encoder adopts fiber optic splitter that input optical pulse is divided into the N road, and the pulse of every road is adjusted subpulse through the adjustable optic fibre delayer and passed through fiber optic splitter composite coding light pulse sequence more at interval and after the adjustable optic fibre attenuator adjustment subpulse amplitude.But, owing to adopt the single-mode fiber device, and the phase delay difference of every road pulse experience after the beam splitting, the different change takes place in each subpulse polarization state after transmission, causes the polarization state of optical fiber pulse encoder output sequence pulse subpulse inconsistent.If the output encoder light pulse sequence is through polarizing component, the violent change takes place in its coding waveforms, can not be used for Polarization-Sensitive system.Though adopt the optical fiber pulse encoder of polarization maintaining optical fibre device can guarantee the consistance of the subpulse polarization state of output sequence pulse, its manufacturing cost height, difficulty are big, and it is big to insert loss, and output sequence pulse contrast is low.
Summary of the invention
Inconsistent and big for the subpulse polarization state that overcomes the coded light pulses sequence that existing full optical fiber optical optical pulse code method produces for guaranteeing the consistent polarization maintaining optical fibre device manufacturing cost height, difficulty of adopting of subpulse polarization state, insert the big deficiency of loss, the invention provides a kind of reflection type polarization and keep the full optical fiber optical optical pulse encoder.
The technical solution adopted in the present invention is: be divided into the pulse of N road through 1 * N fiber coupler behind the pulsed laser signal input optical fibre circulator, each road optical fiber of 1 * N fiber coupler is connected with variable fibre optic attenuator, variable fibre delay line and faraday's optical fiber polarisation rotating mirror respectively successively, and the pulse of N road is synthesized the coded light pulses sequence of being made up of N pulse by variable fibre delay line, variable fibre optic attenuator and 1 * N fiber coupler after reflecting through faraday's optical fiber polarisation rotating mirror through variable fibre optic attenuator, variable fibre delay line once more again in time domain.Faraday's optical fiber polarisation rotating mirror is 45 ° along the optical axis angle of rotation, the polarization apparatus rear polarizer main shaft that subpulse is reflected once more by faraday's optical fiber polarisation rotating mirror has rotated 90 ° along optical axis, to offset the phase differential that the incident transmission produces during once more through incident path, therefore the polarization principal axis of the relative incident light pulse encoder pulse of polarization principal axis of all subpulses of the light pulse sequence of output optical pulse scrambler has rotated 90 ° along optical axis, and the polarization state of all subpulses of coded light pulses sequence is consistent.Any subpulse amplitude is by the adjusting that decays continuously of variable fibre optic attenuator in the coded light pulses sequence, and the interval of adjacent subpulse is regulated by the thick control of optical fiber total length of every road optical fibre device and by variable fibre delay line continuous precision in the coded light pulses sequence.
The invention has the beneficial effects as follows, can produce all subpulse polarization state unanimities and subpulse amplitude and adjacent pulse adjustable coded light pulses sequence at interval, simple in structure, low cost of manufacture.
Description of drawings
Fig. 1 is the structural representation of embodiments of the invention 1.
Fig. 2 is the structural representation of embodiments of the invention 2.
Among the figure, 1. fiber optical circulator 2.1 * N fiber coupler 3. variable fibre optic attenuator 4. variable fibre delay line 5. faraday's optical fiber polarisation rotating mirrors 6. fiber amplifiers.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
In the embodiment shown in fig. 1, fiber optical circulator 1 is connected with 1 * N fiber coupler, 2 input single fiber ends, 1 * N fiber coupler, 2 beam splitting output terminal n(n are among the 1-N any one the tunnel) the variable fibre optic attenuator 3 of road optical fiber and this road, variable fibre delay line 4 is connected successively with faraday's optical fiber polarisation rotating mirror 5, pulse is divided into the pulse of N road through fiber optical circulator 1 input 1 * N fiber coupler 2 by constant power, behind each road pulse variable fibre optic attenuator 3 of process and the variable fibre delay line 4, passed through variable fibre delay line 4 and variable fibre optic attenuator 3 once more by 5 reflections of faraday's optical fiber polarisation rotating mirror, and pass through 1 * N fiber coupler 2 at time domain composite coding light pulse sequence, at last through fiber optical circulator 1 output.Variable fibre optic attenuator 3 is used to regulate the amplitude that decay changes coded light pulses sequence subpulse, the optical fiber total length of every road optical fibre device is used for slightly controlling coded light pulses sequence subpulse at interval, variable fibre delay line 4 is used for minute adjustment coded light pulses sequence subpulse at interval, faraday's optical fiber polarisation rotating mirror 5 is 45 ° along the optical axis angle of rotation, the phase differential that when being used to reflect the incident subpulse its polarization principal axis is produced with cancellation pulses incident transmission along the optical axis half-twist.
In embodiment illustrated in fig. 2, fiber optical circulator 1 is connected with 1 * N fiber coupler, 2 input single fiber ends, 1 * N fiber coupler, 2 beam splitting output terminal n(n are among the 1-N any one the tunnel) the variable fibre optic attenuator 3 of road optical fiber and this road, variable fibre delay line 4, fiber amplifier 6 is connected successively with faraday's optical fiber polarisation rotating mirror 5, pulse is divided into the pulse of N road through fiber optical circulator 1 input 1 * N fiber coupler 2 by constant power, each road pulse is through variable fibre optic attenuator 3, behind variable fibre delay line 4 and the fiber amplifier 6, passed through fiber amplifier 6 once more by 5 reflections of faraday's optical fiber polarisation rotating mirror, variable fibre delay line 4 and variable fibre optic attenuator 3, and pass through 1 * N fiber coupler 2 at time domain composite coding light pulse sequence, at last through fiber optical circulator 1 output.Variable fibre optic attenuator 3 is used to regulate the amplitude that decay changes coded light pulses sequence subpulse, the optical fiber total length of every road optical fibre device is used for slightly controlling the subpulse interval of coded light pulses sequence, variable fibre delay line 4 is used for the subpulse interval of minute adjustment coded light pulses sequence, fiber amplifier 6 is used to amplify the beam splitting loss of compensation coding light pulse sequence subpulse, faraday's optical fiber polarisation rotating mirror 5 is 45 ° along the optical axis angle of rotation, the phase differential that when being used to reflect the incident subpulse its polarization principal axis is produced with cancellation pulses incident transmission along the optical axis half-twist.
In embodiment illustrated in figures 1 and 2,1 * N fiber coupler 2, variable fibre optic attenuator 3, variable fibre delay line 4, faraday's optical fiber polarisation rotating mirror 5, fiber amplifier 6 adopt single-mode fiber; 1 * N fiber coupler 2 can be by 1 * n(n＜N) the fiber coupler cascade constitutes; Can adopt variable fibre optic attenuator 3 electric light, magneto-optic, acousto-optic and other methods realize the scalable decay of light pulse.
Claims (2)
1. a reflection type polarization keeps the full optical fiber optical optical pulse encoder, it is characterized in that: fiber optical circulator (1) is connected with 1 * N fiber coupler (2) input single fiber end, and the every road of 1 * N fiber coupler (2) beam splitting output terminal optical fiber is connected successively with the variable fibre optic attenuator in this road (3), variable fibre delay line (4) and faraday's optical fiber polarisation rotating mirror (5).
2. reflection type polarization according to claim 1 keeps the full optical fiber optical optical pulse encoder, and it is characterized in that: described scrambler is provided with fiber amplifier (6) between variable fibre delay line (4) and faraday's optical fiber polarisation rotating mirror (5).
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| CN 201110060664 CN102156376A (en) | 2011-03-15 | 2011-03-15 | Reflective polarization maintaining all-fiber optical pulse coder |
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| CN 201110060664 CN102156376A (en) | 2011-03-15 | 2011-03-15 | Reflective polarization maintaining all-fiber optical pulse coder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503028A (en) * | 2014-12-23 | 2015-04-08 | 中国工程物理研究院流体物理研究所 | Identical polarization time division multiplexing device and manufacturing method |
| CN104820295A (en) * | 2014-01-30 | 2015-08-05 | 奥普林克通信公司 | Athermal Faraday rotator mirror |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6246350B1 (en) * | 1998-12-23 | 2001-06-12 | Hughes Electronics Corporation | Optoelectronic analog-to-digital converter |
| JP2005070382A (en) * | 2003-08-25 | 2005-03-17 | Tokyo Institute Of Technology | Optical digital-to-analog conversion type code-identifying device and method |
| CN101290458A (en) * | 2008-06-03 | 2008-10-22 | 电子科技大学 | All-light analog-digital converter NMX parallel quantitative coding method |
| CN202008541U (en) * | 2011-03-15 | 2011-10-12 | 中国工程物理研究院激光聚变研究中心 | Reflective polarization maintaining all optical fiber optical pulse encoder |
-
2011
- 2011-03-15 CN CN 201110060664 patent/CN102156376A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6246350B1 (en) * | 1998-12-23 | 2001-06-12 | Hughes Electronics Corporation | Optoelectronic analog-to-digital converter |
| JP2005070382A (en) * | 2003-08-25 | 2005-03-17 | Tokyo Institute Of Technology | Optical digital-to-analog conversion type code-identifying device and method |
| CN101290458A (en) * | 2008-06-03 | 2008-10-22 | 电子科技大学 | All-light analog-digital converter NMX parallel quantitative coding method |
| CN202008541U (en) * | 2011-03-15 | 2011-10-12 | 中国工程物理研究院激光聚变研究中心 | Reflective polarization maintaining all optical fiber optical pulse encoder |
Non-Patent Citations (1)
| Title |
|---|
| 《ELECTRONICS LETTERS》 20010927 T. Saida et al Integrated optical digital-to-analogue converter and its application to pulse pattern recognition 第1237-1238页 1-2 第37卷, 第20期 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820295A (en) * | 2014-01-30 | 2015-08-05 | 奥普林克通信公司 | Athermal Faraday rotator mirror |
| CN104820295B (en) * | 2014-01-30 | 2020-04-28 | 奥普林克通信公司 | Athermal Faraday rotator mirror |
| CN104503028A (en) * | 2014-12-23 | 2015-04-08 | 中国工程物理研究院流体物理研究所 | Identical polarization time division multiplexing device and manufacturing method |
| CN104503028B (en) * | 2014-12-23 | 2018-04-03 | 中国工程物理研究院流体物理研究所 | One kind polarization identical TDMD time division multiplex device and preparation method |
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Application publication date: 20110817 |