CN115001533A - Microwave signal coding frequency hopping device based on light injection external cavity type FP-LD - Google Patents
Microwave signal coding frequency hopping device based on light injection external cavity type FP-LD Download PDFInfo
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- CN115001533A CN115001533A CN202210594456.XA CN202210594456A CN115001533A CN 115001533 A CN115001533 A CN 115001533A CN 202210594456 A CN202210594456 A CN 202210594456A CN 115001533 A CN115001533 A CN 115001533A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08018—Mode suppression
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08054—Passive cavity elements acting on the polarization, e.g. a polarizer for branching or walk-off compensation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10061—Polarization control
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Abstract
The invention discloses a microwave signal coding frequency hopping device based on a light injection external cavity type FP-LD. The invention comprises a first main laser, a second main laser, a first polarization controller, a second polarization controller, a programmable control optical switch, an optical fiber circulator, an external cavity FP-LD, a photoelectric detector and a real-time oscilloscope. The invention utilizes the single period oscillation nonlinear dynamic state of the light injection external cavity type FP-LD and the coding optical switch to realize the high-speed coding frequency hopping of the microwave signals with different frequencies, the frequency hopping rate of the invention is consistent with the code rate of the optical switch, and the frequency hopping range of the microwave signals is large, the frequency hopping rate is high, the system has good reconfigurability, the structure is simple, and the tuning is easy.
Description
Technical Field
The invention relates to the technical field of microwave photonics and optical generation and processing of microwave signals, and provides a microwave signal coding frequency hopping device based on a light injection external cavity Fabry-Perot semiconductor laser (FP-LD) based on nonlinear dynamics characteristic research of the light injection semiconductor laser.
Background
The working principle of the frequency hopping microwave communication technology is that the carrier frequency of signals transmitted by a transmitting party and a receiving party is controlled by a pseudo-random change code to randomly jump, and the function of the frequency hopping microwave communication technology is to ensure the secrecy and the anti-interference of communication. Therefore, frequency hopping microwave signals play an important role in the fields of wireless communication, radar systems, electronic countermeasure, and the like. With the increasing complexity of electromagnetic environment, electronic countermeasure means are gradually upgraded, and frequency hopping microwave signals need a larger frequency hopping range and a faster frequency hopping speed to improve the anti-interference and anti-interception performance of the communication. For the traditional electricity frequency hopping microwave signal generation scheme, due to the limitation of an electronic bottleneck, the generated frequency hopping microwave signal has a small range, low frequency and low frequency hopping speed. In recent years, the development of Microwave photonic Technology provides a new idea for the generation of frequency hopping Microwave signals, and Microwave photonic Technology, as a new Technology with a multi-disciplinary fusion, realizes the functions of transmission, processing, control and the like of Microwave signals by loading the Microwave signals onto light waves, has the advantages of high frequency, large broadband, low loss, electromagnetic interference resistance and the like, and can complete the functions of signal processing, high-speed transmission and the like which are difficult to complete by electronic systems (see [ j.yao, "Microwave Photonics," Journal of Lightwave Technology, vol.27, No.3, pp.314-335,2009 ].
At present, the microwave photon technology is mainly adopted to generate microwave frequency hopping signals, and the following schemes are provided: (1) realizing frequency hopping microwave signal generation based on spectrum shaping and a frequency-time mapping method; (2) the baseband coding signal is used for controlling the bias point voltage of the intensity modulator to realize the optical switching function; (3) directly modulating the semiconductor laser by using a baseband coding signal; (4) and controlling the pass band of the adjustable filter by utilizing the baseband coding signal to realize frequency hopping. However, the above solutions have certain disadvantages: the scheme (1) has large system volume, poor tunability, the scheme (2) has single function and poor reconfigurability of frequency hopping signals, the schemes (3) and (4) are limited by relaxation oscillation frequency of a semiconductor laser and an adjustable filter, and the frequency hopping rate and the frequency range of the signals are still limited. (see Q.Liu, M.P.Fok., ultra and Wireless Microwave Photonic Frequency-hosting Systems: A review., Applied Sciences,2020,10(2):521.)
Disclosure of Invention
The invention aims to overcome the defects of the existing frequency hopping microwave signal generation technology and provides a microwave signal coding and frequency hopping device based on a light injection external cavity type FP-LD.
The technical scheme of the invention is as follows:
the invention comprises a first main laser, a second main laser, a first polarization controller, a second polarization controller, a programmable control optical switch, an optical fiber circulator, an external cavity FP-LD, a photoelectric detector and a real-time oscilloscope.
The tunable single-frequency laser generated by the first main laser sequentially passes through the first polarization controller and the encodable control optical switch to form first main laser.
The tunable single-frequency laser generated by the second main laser forms second main laser after passing through the second polarization controller, and the second main laser and the first main laser are input to the port A of the optical fiber circulator after being combined.
The output light of the injected external cavity FP-LD is input into a photoelectric detector through the port C of the optical fiber circulator to be subjected to photoelectric conversion to generate a microwave signal, and the generated electric signal is monitored in real time by a real-time oscilloscope.
The external cavity type FP-LD is driven by a semiconductor laser temperature current controller, so that the spectrum of the external cavity type FP-LD is divided into a single main mode and a series of suppressed side modes. Setting the frequency of the first main laser to f 1 Injected into the main mode of the external cavity FP-LD with frequency f 0 When the laser cavity is in a single-period oscillation state, the frequency of the injected light and the main mode is detuned to be delta f 1 ＝f 1 －f 0 。
Setting the frequency to f 2 Is injected into one side mode of the external cavity type FP-LD and has a frequency f s The frequency detuning of the injected light from the side mode is Δ f 2 ＝f 2 －f s And adjusting the optical power of the second master laser, exciting the suppressed side mode oscillation, simultaneously enabling the master mode to be in an oscillation or suppressed state, and setting a programmable control optical switch to carry out amplitude coding switch control on the first master laser so as to realize coding frequency hopping.
The invention has the advantages of high reconfigurability, simple structure, easy tuning, large microwave signal frequency hopping range, high frequency hopping rate, various flexible frequency hopping schemes and the like.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a sectional view of an external cavity type FP-LD;
FIG. 3(a) is a diagram illustrating a multimode FP-LD spectral simulation;
FIG. 3(b) is a schematic diagram of the simulation of the external cavity FP-LD spectrum.
Detailed Description
The invention realizes high-speed coding frequency hopping of microwave signals with different frequencies by utilizing the single-period oscillation nonlinear dynamic state of the light injection outer cavity type FP-LD and the coding optical switch, and has the advantages of consistent frequency hopping rate with the code type and the rate of the optical switch, large frequency hopping range and high frequency hopping rate of the microwave signals, good system reconfigurability, simple structure and easy tuning.
As shown in fig. 1, the device for realizing microwave signal coding frequency hopping based on light injection external cavity type FP-LD includes main lasers 1-1 and 1-2 (single frequency laser source), a slave laser 5 (external cavity type FP-LD), polarization controllers 2-1 and 2-2, a code generator 8, an intensity modulator 3, a fiber circulator 6 and a real-time oscilloscope 7. Tunable single-frequency laser generated by the main laser 1-1 passes through the polarization controller 2-1 and the intensity modulator 3 and then is input into an A port of the optical fiber circulator, wherein the code pattern generator 8 and the intensity modulator 3 form a codeable control optical switch to carry out amplitude coding switch control on the single-frequency laser I. Meanwhile, tunable single-frequency laser generated by the main laser 1-2 passes through the polarization controller 2-2, is combined with the single-frequency laser I and then is input into an A port of the optical fiber circulator, beam combining laser output by a B port of the optical fiber circulator is input into an external cavity FP-LD, output light of the injected external cavity FP-LD is input into a photoelectric detector through a C port of the optical fiber circulator to be subjected to photoelectric conversion to generate a microwave signal, and the generated electric signal is monitored in real time by the real-time oscilloscope 4.
As shown in fig. 2, the slave laser 5 used in the present invention is an external cavity fabry-perot cavity semiconductor laser, which includes three main parts: the optical fiber module comprises a multimode FP-LD 5-1, an external cavity 5-2 and an optical fiber pigtail 5-3, wherein the external cavity consists of an emission end face of the FP-LD, an optical fiber pigtail end face and an aspheric lens 5-4. Since the external cavity can be regarded as an F-P cavity, the gain G of the mode structure can be expressed as follows:
wherein T represents the transmittance T-1-R of the lumen output end face 2 ，G 0 Denotes the one-way gain, R, of the lumen 1 And R 2 Respectively representing the two end face reflectivities, R, of the FP-LD 3 Is the reflectivity of the fiber pigtail. β represents a phase difference expressed as:
β＝4πL/λ+2π (2)
where λ represents the wavelength of light and L represents the external cavity length.
The output spectrum of the external cavity type FP-LD can be simulated by combining a commercial FP-LD rate equation and an external cavity gain G. FIGS. 3(a) and (b) are schematic diagrams of spectral simulations of a multi-mode FP-LD and an external cavity type FP-LD, respectively.
The external cavity FP-LD presents abundant nonlinear dynamic states under the action of injected light, wherein the nonlinear dynamic states comprise a single-period oscillation state suitable for microwave signal generation application. Under the condition of a single-period oscillation state, the injected light and the injected mode generate microwave frequency band electric signals through photoelectric conversion, the frequency of the microwave frequency band electric signals is equal to the frequency detuning between the injected light and the corresponding mode of the external cavity type FP-LD, and the multifunctional coding frequency hopping is realized as follows:
(1) the external cavity type FP-LD is driven by a semiconductor laser temperature current controller, so that the spectrum of the external cavity type FP-LD is divided into a single main mode and a series of suppressed side modes.
(2) By setting the frequency of the main laser I to f 1 A main mode injected into the external cavity type FP-LD with a frequency f 0 When the laser cavity is in a single-period oscillation state, the frequency of the injected light and the main mode is detuned to be delta f 1 ＝f 1 －f 0 。
(3) Under the conditions of (1) and (2), by setting the frequency to f 2 The main laser beam II is injected into one side mode of the external cavity type FP-LD and has a frequency f s The frequency mismatch between the injected light and the side mode is Δ f 2 ＝f 2 －f s . By adjusting the optical power of the main laser II, the suppressed side mode oscillation can be excited, while the main mode can be made to be in an oscillating or suppressed state.
(4) Under the condition of (3), when the main mode oscillates and the side mode is excited, two frequencies Δ f can be generated simultaneously 1 ＝f 1 －f 0 And Δ f 2 ＝f 2 －f s The microwave signal of (2). Therefore, by setting the coding optical switch to carry out amplitude coding switch control on the main laser I, the mutual switching between a single microwave signal and two microwave signals, namely delta f 1 And (Δ f) 1 And Δ f 2 ) Code hopping.
(5) Under the condition of (3), when the main mode is suppressed and the side mode is excited, a single-frequency microwave signal delta f can be generated 2 ＝f 2 －f s . Thus, it is possible to provideThe amplitude coding switch control is carried out on the main laser I by setting the coding optical switch, so that the mutual switching between two microwave signals can be realized, namely delta f 1 And Δ f 2 Code hopping.
(6) Under the conditions of (1) and (2), by setting the frequency to f 2 The main laser light II is injected into the main mode of the external cavity type FP-LD, and the frequency detuning between the injected light and the main mode is delta f 2 ＝f 2 －f 0 . By setting the optical power of the main laser II, the main mode can be in a suppressed state under the dual-light injection condition.
(7) Under the condition of (6), when two main lasers are respectively injected into two sides of the main mode, a single-frequency microwave signal | delta f can be generated 1 +Δf 2 L. Therefore, by setting the coding optical switch to carry out amplitude coding switch control on the main laser I, the mutual switching between two microwave signals can be realized, namely delta f 1 And | Δ f 1 +Δf 2 Code hopping between | s.
(8) Under the condition of (6), when two main lasers are respectively injected into the same side of the main die, a single-frequency microwave signal | Δ f can be generated 1 －Δf 2 L. Therefore, by setting the coding optical switch to carry out amplitude coding switch control on the main laser I, the mutual switching between two microwave signals can be realized, namely delta f 1 And | Δ f 1 －Δf 2 Code hopping between | s.
The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.
Claims (7)
1. Microwave signal coding frequency hopping device based on light injection external cavity type FP-LD comprises a first main laser, a second main laser, a first polarization controller, a second polarization controller, a coding control optical switch, an optical fiber circulator, an external cavity type FP-LD, a photoelectric detector and a real-time oscilloscope, and is characterized in that:
the tunable single-frequency laser generated by the first main laser sequentially passes through the first polarization controller and the encodable control optical switch to form first main laser;
tunable single-frequency laser generated by the second main laser forms second main laser after passing through the second polarization controller, and the second main laser and the first main laser are input to an A port of the optical fiber circulator after being combined;
the output light of the injected external cavity FP-LD is input into a photoelectric detector through the port C of the optical fiber circulator to be subjected to photoelectric conversion to generate a microwave signal, and a real-time oscilloscope is used for monitoring the generated electric signal in real time;
driving an outer cavity type FP-LD through a temperature and current controller of the semiconductor laser to enable the spectrum of the outer cavity type FP-LD to be a single main mode and a series of suppressed side modes; setting the frequency of the first main laser to f 1 Injected into the main mode of the external cavity FP-LD with frequency f 0 When the laser cavity is in a single-period oscillation state, the frequency of the injected light and the main mode is detuned to be delta f 1 ＝f 1 －f 0 ；
Setting the frequency to f 2 Is injected into one side mode of the external cavity type FP-LD and has a frequency f s The frequency detuning of the injected light from the side mode is Δ f 2 ＝f 2 －f s And adjusting the optical power of the second master laser, exciting the suppressed side mode oscillation, simultaneously enabling the master mode to be in an oscillation or suppressed state, and setting a codeable control optical switch to carry out amplitude coding switch control on the first master laser so as to realize coding frequency hopping.
2. The microwave signal coding and frequency hopping device based on the light injection external cavity type FP-LD as claimed in claim 1, wherein: the said coding control light switch is composed of code generator and intensity modulator, and is used to control the amplitude coding switch of single-frequency laser.
3. The microwave signal coding and frequency hopping device based on the light injection external cavity type FP-LD as claimed in claim 1, wherein: when the main mode oscillates and the side mode is excited, two frequencies Δ f are generated simultaneously 1 ＝f 1 －f 0 And Δ f 2 ＝f 2 －f s The microwave signal of (2); amplitude coding switch control is carried out on the first main laser through the coding control optical switch, so that mutual switching between a single microwave signal and two microwave signals is realized, namely delta f 1 And (Δ f) 1 And Δ f 2 ) Code hopping.
4. The microwave signal coding and frequency hopping device based on the light injection external cavity type FP-LD as claimed in claim 1, wherein: when the main mode is suppressed and the side mode is excited, a single-frequency microwave signal delta f can be generated 2 ＝f 2 －f s (ii) a Amplitude coding switch control is carried out on the first main laser through the coding control optical switch to realize mutual switching between two microwave signals, namely delta f 1 And Δ f 2 Code hopping.
5. The microwave signal coding and frequency hopping device based on the light injection external cavity type FP-LD as claimed in claim 1, wherein: setting the frequency to f 2 Is injected into a main mode of the external-cavity type FP-LD, the frequency detuning between the injected light and the main mode is Deltaf 2 ＝f 2 －f 0 (ii) a The optical power of the second main laser is set, and the main mode is in a suppressed state under the condition of double-light injection.
6. The microwave signal coding and frequency hopping device based on the light injection external cavity type FP-LD as claimed in claim 5, wherein: when two main lasers are respectively injected into two sides of the main die, a single-frequency microwave signal | delta f is generated 1 +Δf 2 L, |; amplitude coding switch control is carried out on the first main laser through the coding control optical switch to realize mutual switching between two microwave signals, namely delta f 1 And | Δ f 1 +Δf 2 Code hopping between | s.
7. The microwave signal coding and frequency hopping device based on the light injection external cavity type FP-LD as claimed in claim 5, wherein: when two main lasers are respectively injected into the same side of the main die, the laser is producedGenerating a single frequency microwave signal | Δ f 1 －Δf 2 L, |; amplitude coding switch control is carried out on the first main laser through the coding control optical switch to realize mutual switching between two microwave signals, namely delta f 1 And | Δ f 1 －Δf 2 Code hopping between | s.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040190595A1 (en) * | 2003-03-25 | 2004-09-30 | General Instrument Corporation | Method and apparatus for controlling a frequency hopping laser |
| CN101354248A (en) * | 2008-09-27 | 2009-01-28 | 北京航空航天大学 | High precision absolute distance measuring instrument of frequency scanning interference method |
| US20090059970A1 (en) * | 2007-08-27 | 2009-03-05 | Axsun Technologies, Inc. | Mode Hopping Swept Frequency Laser for FD OCT and Method of Operation |
| US20130044778A1 (en) * | 2011-08-18 | 2013-02-21 | Jacques Gollier | Optical sources having a cavity-matched external cavity |
| CN109257102A (en) * | 2018-09-30 | 2019-01-22 | 西南交通大学 | A kind of multistage microwave Frequency Hopping Signal generator based on photon technology |
| CN109981176A (en) * | 2019-03-29 | 2019-07-05 | 中国科学院半导体研究所 | Light frequency-hopping system and transmitter, receiver based on Polarization Modulation |
| CN109981174A (en) * | 2019-04-09 | 2019-07-05 | 中国科学院半导体研究所 | Light frequency-hopping system and transmitter based on optical circulator |
| CN110137778A (en) * | 2019-05-06 | 2019-08-16 | 中国科学院半导体研究所 | Double chirp Fourier mode locking optical-electronic oscillators and application and communication system |
| CN114337731A (en) * | 2021-11-30 | 2022-04-12 | 中国科学院半导体研究所 | Optical frequency hopping communication system and method |
-
2022
- 2022-05-27 CN CN202210594456.XA patent/CN115001533B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040190595A1 (en) * | 2003-03-25 | 2004-09-30 | General Instrument Corporation | Method and apparatus for controlling a frequency hopping laser |
| US20090059970A1 (en) * | 2007-08-27 | 2009-03-05 | Axsun Technologies, Inc. | Mode Hopping Swept Frequency Laser for FD OCT and Method of Operation |
| CN101354248A (en) * | 2008-09-27 | 2009-01-28 | 北京航空航天大学 | High precision absolute distance measuring instrument of frequency scanning interference method |
| US20130044778A1 (en) * | 2011-08-18 | 2013-02-21 | Jacques Gollier | Optical sources having a cavity-matched external cavity |
| CN109257102A (en) * | 2018-09-30 | 2019-01-22 | 西南交通大学 | A kind of multistage microwave Frequency Hopping Signal generator based on photon technology |
| CN109981176A (en) * | 2019-03-29 | 2019-07-05 | 中国科学院半导体研究所 | Light frequency-hopping system and transmitter, receiver based on Polarization Modulation |
| CN109981174A (en) * | 2019-04-09 | 2019-07-05 | 中国科学院半导体研究所 | Light frequency-hopping system and transmitter based on optical circulator |
| CN110137778A (en) * | 2019-05-06 | 2019-08-16 | 中国科学院半导体研究所 | Double chirp Fourier mode locking optical-electronic oscillators and application and communication system |
| CN114337731A (en) * | 2021-11-30 | 2022-04-12 | 中国科学院半导体研究所 | Optical frequency hopping communication system and method |
Non-Patent Citations (2)
| Title |
|---|
| MUYOUNG LEE等: ""Multi-Band Linear Frequency Modulation in External Cavity FP-LD Subjected to Multi-Input Injection"", 《 IEEE PHOTONICS TECHNOLOGY LETTERS》 * |
| 谢小军: "\"基于光频率梳的射频信道化接收机\"", 《中国优秀硕士学位论文全文数据库》 * |
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