CN104600560A - Broadband chaotic light emitter based on integrated external-cavity semiconductor laser unit - Google Patents
Broadband chaotic light emitter based on integrated external-cavity semiconductor laser unit Download PDFInfo
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Abstract
A broadband chaotic light emitter based on an integrated external-cavity semiconductor laser unit comprises the integrated external-cavity semiconductor laser unit, a three-port optical circulator and an optical coupler, wherein the port 2 of the three-port optical circulator is connected with the integrated external-cavity semiconductor laser unit and used for receiving an optical signal of a feedback circuit and then transmitting the optical signal to the integrated external-cavity semiconductor laser unit, meanwhile receiving the optical signal produced by the integrated external-cavity semiconductor laser unit and then sending the optical signal to the feedback circuit and ensuring optical signal single-line transmission in the feedback circuit, the port 1 of the optical coupler is connected with the output port 3 of the three-port optical circulator and used for sending a part of optical signals output by the integrated external-cavity semiconductor laser unit through the three-port optical circulator to the feedback circuit at preset power and outputting the other part of optical signals, the port 2 of the optical coupler is connected with the port 1 of the three-port optical circulator to form a feedback circuit, and the port 3 of the optical coupler is a chaotic light signal output port.
Description
Technical field
The present invention relates to chaos optical transmitting set technical field, refer in particular to a kind of broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser.
Background technology
Along with the sharply increase developing number of network users rapidly of Internet technology, the Internet has become the main platform that people's information is transmitted.The confidentiality of network has become the focus of attention in recent years, and safe and reliable communication network is to national defense safety, and the privacy of enterprise and individual all has close relationship.What generally adopt at present is software encryption technique based on public's key.But along with the lifting of computer computation ability, the fail safe of this encryption technology receives acid test.Replace existing algorithm for encryption technology by the cryptographic means of physically based deformation aspect, build secret signalling tool more reliably and be of great significance.
Semiconductor laser all can produce high-quality chaotic signal under light feedback, electro-optical feedback and light inject.This chaotic signal has physical accidental, unpredictable and to advantages such as initial condition are very responsive for a long time, has become the alternative that secure communication field is important.And semiconductor laser has and makes simple, and accessible site, can be mass-produced, working stability, with the feature such as existing communication net mate, be all that its application in secure communication is laid a good foundation.In addition, high-quality chaos light signal produces at physical random number, laser radar, and all there is important application domain reflectometer aspect.
At present, chaos light produces mainly through the additional smooth injected system of distributed feedback semiconductor laser, and light reponse system realizes.These technology are all assisted based on discrete device and external circuits, and need in experiment to regulate each device accurately, its volume and stability become in practical application the problem needing to overcome.The chaos optical transmitting set of based semiconductor integrated chip, miniaturized with it, can single-chip integration, stable working state and be not subject to the advantages such as ambient environmental factors interference, become the focus of people's research in recent years.But the chaotic signal Bandwidth-Constrained produced by integrated chip, in the relaxation concussion frequency of laser, be generally below 10GHz, and the chaos operating state scope produced is very little, is directly affects its application in high speed chaotic communication and the generation of high speed random number.
Therefore, the previous urgent problems of order is exactly: the chaos bandwidth improving integrated device, expands the working range of chaos state, solves semiconductor integrated chip deficiency in actual applications, realizes broadband, high integration, the high-quality chaos optical transmitting set of high stability.
Summary of the invention
The object of the invention is to, a kind of broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser is provided, its can overcome general Integrated-External Cavity Semiconductor Laser produce the deficiency of chaotic signal in bandwidth sum working range, the present invention only needs an Integrated-External Cavity Semiconductor Laser chip and outside optical feedback return circuit just can realize broadband to stablize large-scale chaos light signal and produce, there is integrated level high, compact conformation, good stability, manufacture craft is simple, cost is low, is easy to the advantage realized.
The invention provides a kind of broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser, comprising:
One Integrated-External Cavity Semiconductor Laser;
One or three ports light rings, its port 2 is connected with Integrated-External Cavity Semiconductor Laser, light signal for receiving feedback loop passes to Integrated-External Cavity Semiconductor Laser, receive the light signal feeding feedback loop that Integrated-External Cavity Semiconductor Laser produces simultaneously, and ensure the light signal single file transmission in feedback loop;
One optical coupler, its port one is connected with the output port 3 of three ports light rings, feedback loop is sent into according to the power ratio part preset for the light signal exported by Integrated-External Cavity Semiconductor Laser via ports light rings, a part exports, the port 2 of this optical coupler is connected with the port one of three ports light rings, form feedback loop, the port 3 of this optical coupler is chaos light signal output end mouth.
The invention has the beneficial effects as follows: the core devices adopting Integrated-External Cavity Semiconductor Laser to produce as chaos light, adopts the feedback loop of full light to carry out self seeding integrated chip, the chaotic signal realizing high-quality exports.This method only needs an Integrated-External Cavity Semiconductor Laser chip and an outside optical feedback return circuit just can realize broadband, stable, and the chaos light signal that working range is wide produces, there is integrated level high, compact conformation, good stability, manufacture craft is simple, and cost is low, is easy to the advantage realized.
Accompanying drawing explanation
For further illustrating concrete technical characteristic of the present invention, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further details, wherein:
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is the block diagram of an embodiment of the present invention;
Fig. 3 is the structural representation of Integrated-External Cavity Semiconductor Laser a.
Embodiment
Refer to Fig. 1, shown in Fig. 2 and Fig. 3, the invention provides a kind of broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser, comprising:
One Integrated-External Cavity Semiconductor Laser a, the Integrated-External Cavity Semiconductor Laser a adopted is that one is integrated with Distributed Feedback Laser district, the syllogic semiconductor laser (consulting Fig. 3) in phase region and amplification feedback district, the Distributed Feedback Laser district of described Integrated-External Cavity Semiconductor Laser a and amplification feedback district adopt the material of same band gap wavelength, the material band gap wavelength that phase region adopts is relative to Distributed Feedback Laser district and amplify feedback district blue shift 80nm-120nm, the absorption loss of phase region to light field can be reduced like this, realize the phase adjusted of feedback light, the Integrated-External Cavity Semiconductor Laser a adopted is by regulating Distributed Feedback Laser district, the Injection Current in phase region and amplification feedback district, realize single-mode output and spacing tunable dual-mode laser output on a large scale, each segment length of described Integrated-External Cavity Semiconductor Laser a can regulate, for controlling the dual-mode of operation scope of produced dual-mode laser, the Integrated-External Cavity Semiconductor Laser a adopted, its end face near one end, Distributed Feedback Laser district is exiting surface, for being connected with the port 2 of three port circulators,
One or three ports light rings b, its port 2 is connected with Integrated-External Cavity Semiconductor Laser a, light signal for receiving feedback loop passes to Integrated-External Cavity Semiconductor Laser a, receive the light signal that Integrated-External Cavity Semiconductor Laser a produces simultaneously and send into feedback loop, and ensure that light signal in feedback loop transmits along the direction single file from the port 3 of port 2, three ports light rings b of three ports light rings b, the port one of optical coupler c (chatting afterwards) and three ports light rings b;
One optical coupler c, its port one is connected with the output of three ports light rings b, feedback loop is sent into according to the power ratio part preset for the light signal exported by Integrated-External Cavity Semiconductor Laser a via ports light rings b, a part exports, this power ratio is used for the ratio of the luminous power of regulation output signal and feeding feedback loop, the described light signal exported by the port 3 of optical coupler c is feeding photodetector, to produce the chaos signal of telecommunication, the port 2 of this optical coupler c is connected with the port one of three ports light rings b;
Wherein three ports light rings b and optical coupler c form feedback loop, and the arbitrary node place in described feedback loop also comprises a section single-mould fiber (not shown), by regulating the length of the cut to lengthen feedback loop of monomode fiber; A fiber amplifier d also can be comprised between the port 3 of three ports light rings b and the port one of optical coupler c in described feedback loop, for amplifying the power of the light signal that Integrated-External Cavity Semiconductor Laser a exports, improve the power of the final chaos light produced, and the optical signal power entering feedback loop is improved, exceed the threshold value exciting Integrated-External Cavity Semiconductor Laser a to enter chaos state; Integrated outside cavity gas laser power output and enough high with the Slop efficiency that is coupled of optical fiber time, fiber amplifier d can omit.An adjustable optical attenuator e also can be comprised, for controlling the power of the light signal of feedback loop between the port 2 of optical coupler c and the port one of three ports light rings b in described feedback loop; A Polarization Controller f also can be comprised between the port 2 of optical coupler c and the port one of three ports light rings b in described feedback loop, for controlling the polarization state of the feedback signal injecting Integrated-External Cavity Semiconductor Laser a from feedback loop, the polarization state of feedback signal polarisation of light state and Integrated-External Cavity Semiconductor Laser a shoot laser is matched.As system adopts polarization maintaining optical fibre etc. to protect inclined device, then without the need to Polarization Controller f.
Adjustable optical attenuator e between the port 2 of the wherein said c of optical coupler in the feedback loop and the port one of three ports light rings b and Polarization Controller f, can individualism or simultaneously exist.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1., based on a broadband chaos optical transmitting set for Integrated-External Cavity Semiconductor Laser, comprising:
One Integrated-External Cavity Semiconductor Laser;
One or three ports light rings, its port 2 is connected with Integrated-External Cavity Semiconductor Laser, light signal for receiving feedback loop passes to Integrated-External Cavity Semiconductor Laser, receive the light signal feeding feedback loop that Integrated-External Cavity Semiconductor Laser produces simultaneously, and ensure the light signal single file transmission in feedback loop;
One optical coupler, its port one is connected with the output port 3 of three ports light rings, feedback loop is sent into according to the power ratio part preset for the light signal exported by Integrated-External Cavity Semiconductor Laser via ports light rings, a part exports, the port 2 of this optical coupler is connected with the port one of three ports light rings, form feedback loop, the port 3 of this optical coupler is chaos light signal output end mouth.
2. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 1, the arbitrary node place wherein in feedback loop also comprises a section single-mould fiber, by regulating the length of the cut to lengthen feedback loop of monomode fiber.
3. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 1, wherein also comprise a fiber amplifier between the port 3 of three ports light rings and the port one of optical coupler in feedback loop, for amplifying the power of the light signal that Integrated-External Cavity Semiconductor Laser a exports.
4. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 1, wherein also comprise an adjustable optical attenuator, for controlling the power of the light signal of feedback loop between the port 2 of optical coupler and the port one of three ports light rings in feedback loop.
5. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 1, wherein also comprise a Polarization Controller between the port 2 of optical coupler and the port one of three ports light rings in feedback loop, for controlling the polarization state of the feedback signal injecting Integrated-External Cavity Semiconductor Laser from feedback loop.
6. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 1, wherein adopted Integrated-External Cavity Semiconductor Laser is integrated with the syllogic semiconductor laser that district is fed back in Distributed Feedback Laser district, phase region and amplification.
7. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 6, the Distributed Feedback Laser district of wherein adopted Integrated-External Cavity Semiconductor Laser and amplification feedback district adopt the material of same band gap wavelength, and the material band gap wavelength that phase region adopts feeds back district blue shift 80nm-120nm relative to Distributed Feedback Laser district with amplifying.
8. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 7, wherein adopted Integrated-External Cavity Semiconductor Laser is the Injection Current by regulating Distributed Feedback Laser district, phase region and amplification to feed back district, realizes single-mode output and spacing tunable dual-mode laser output on a large scale.
9. the broadband chaos optical transmitting set based on Integrated-External Cavity Semiconductor Laser according to claim 1, the light signal wherein exported by the port 3 of optical coupler is feeding photodetector, to produce the chaos signal of telecommunication.
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Cited By (12)
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| CN104953468A (en) * | 2014-03-25 | 2015-09-30 | 中国科学院半导体研究所 | Four-segment amplification feedback laser structure for chaotic light emission |
| CN105762646A (en) * | 2016-04-20 | 2016-07-13 | 太原理工大学 | Semiconductor chaotic laser integrated with double feedback |
| CN105953784A (en) * | 2016-04-29 | 2016-09-21 | 重庆华渝电气集团有限公司 | Chaotic signal-based angular rate sensor |
| CN106330307A (en) * | 2016-11-04 | 2017-01-11 | 西南大学 | High-speed visible-light chaotic security communication device based on visible light LED |
| CN107591678A (en) * | 2017-09-08 | 2018-01-16 | 太原理工大学 | A kind of recognition methods of the chaotic laser light exocoel time delay based on coherent field |
| CN108155559A (en) * | 2017-12-25 | 2018-06-12 | 武汉电信器件有限公司 | A kind of chaos semiconductor laser and its application method based on random light feedback |
| CN108199259A (en) * | 2017-12-25 | 2018-06-22 | 武汉光迅科技股份有限公司 | A kind of joint disturbance formula chaotic laser light signal generator and its application method |
| CN109116371A (en) * | 2018-07-23 | 2019-01-01 | 中国科学院半导体研究所 | Doppler speed radar based on two-wavelength semiconductor laser |
| CN109600168A (en) * | 2018-12-14 | 2019-04-09 | 中国科学院半导体研究所 | PCB Signal-Testing Generator and operating method based on photon integrated chip |
| CN111124362A (en) * | 2019-12-06 | 2020-05-08 | 太原理工大学 | High-speed physical random number generator based on monolithic integrated chaotic laser |
| CN111916993A (en) * | 2020-06-16 | 2020-11-10 | 太原理工大学 | Chaotic laser with wide tuning wavelength |
| CN113851925A (en) * | 2021-09-28 | 2021-12-28 | 太原理工大学 | Photonic integrated broadband chaotic laser |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953468A (en) * | 2014-03-25 | 2015-09-30 | 中国科学院半导体研究所 | Four-segment amplification feedback laser structure for chaotic light emission |
| CN105762646A (en) * | 2016-04-20 | 2016-07-13 | 太原理工大学 | Semiconductor chaotic laser integrated with double feedback |
| CN105762646B (en) * | 2016-04-20 | 2018-07-24 | 太原理工大学 | A kind of semiconductor chaos laser of collection feedback in pairs |
| CN105953784A (en) * | 2016-04-29 | 2016-09-21 | 重庆华渝电气集团有限公司 | Chaotic signal-based angular rate sensor |
| CN106330307B (en) * | 2016-11-04 | 2019-05-21 | 西南大学 | A kind of high speed visible light chaotic secret communication device based on visible LED |
| CN106330307A (en) * | 2016-11-04 | 2017-01-11 | 西南大学 | High-speed visible-light chaotic security communication device based on visible light LED |
| CN107591678A (en) * | 2017-09-08 | 2018-01-16 | 太原理工大学 | A kind of recognition methods of the chaotic laser light exocoel time delay based on coherent field |
| CN108155559A (en) * | 2017-12-25 | 2018-06-12 | 武汉电信器件有限公司 | A kind of chaos semiconductor laser and its application method based on random light feedback |
| CN108199259A (en) * | 2017-12-25 | 2018-06-22 | 武汉光迅科技股份有限公司 | A kind of joint disturbance formula chaotic laser light signal generator and its application method |
| CN108199259B (en) * | 2017-12-25 | 2020-01-17 | 武汉光迅科技股份有限公司 | Combined disturbance type chaotic laser signal generator and using method thereof |
| CN109116371A (en) * | 2018-07-23 | 2019-01-01 | 中国科学院半导体研究所 | Doppler speed radar based on two-wavelength semiconductor laser |
| CN109600168A (en) * | 2018-12-14 | 2019-04-09 | 中国科学院半导体研究所 | PCB Signal-Testing Generator and operating method based on photon integrated chip |
| CN109600168B (en) * | 2018-12-14 | 2020-10-09 | 中国科学院半导体研究所 | Multifunctional signal source based on photonic integrated chip and operation method |
| CN111124362A (en) * | 2019-12-06 | 2020-05-08 | 太原理工大学 | High-speed physical random number generator based on monolithic integrated chaotic laser |
| CN111124362B (en) * | 2019-12-06 | 2022-03-15 | 太原理工大学 | High-speed physical random number generator based on monolithic integrated chaotic laser |
| CN111916993A (en) * | 2020-06-16 | 2020-11-10 | 太原理工大学 | Chaotic laser with wide tuning wavelength |
| CN113851925A (en) * | 2021-09-28 | 2021-12-28 | 太原理工大学 | Photonic integrated broadband chaotic laser |
| CN113851925B (en) * | 2021-09-28 | 2023-04-07 | 太原理工大学 | Photonic integrated broadband chaotic laser |
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