CN211958239U - Waveform generating device based on semiconductor laser unit monocycle oscillation - Google Patents
Waveform generating device based on semiconductor laser unit monocycle oscillation Download PDFInfo
- Publication number
- CN211958239U CN211958239U CN202020858366.3U CN202020858366U CN211958239U CN 211958239 U CN211958239 U CN 211958239U CN 202020858366 U CN202020858366 U CN 202020858366U CN 211958239 U CN211958239 U CN 211958239U
- Authority
- CN
- China
- Prior art keywords
- optical
- laser
- oscillation
- input end
- microwave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model belongs to the technical field of the microwave photon, a waveform generation device based on semiconductor laser monocycle oscillation is disclosed, include: the device comprises a main laser, a phase modulator, a microwave signal source, a 1 multiplied by n optical coupler, n single-period oscillation branches, a nx1 optical coupler and a photoelectric detector; the phase modulator is provided with an optical input end and a radio frequency input end; the photoelectric detector is provided with an input end and an output end; the output light of the master laser is subjected to phase modulation of a microwave signal source and then is simultaneously injected into the n slave lasers to excite the single-period oscillation states of the n slave lasers. The power and the phase of each output optical signal from the laser in single-period oscillation are independently controlled, and a customized microwave arbitrary waveform signal can be obtained after photoelectric conversion. The technical scheme does not need an optical frequency comb, and has low cost and simple structure; no need of complex filtering and frequency selection, easy operation and high quality of generated signals.
Description
Technical Field
The utility model relates to a microwave photon technical field, concretely relates to waveform generation device and method based on light injection semiconductor laser monocycle oscillation.
Background
The microwave arbitrary waveform generation technology is a technology capable of outputting microwave signals with arbitrary waveform shapes according to requirements, can provide signal sources for radars, navigation, ultrasound, instrument systems and the like, and is widely applied to the fields of civil use, military use and the like. Researchers have not stopped the relevant studies: the traditional microwave arbitrary waveform generation is realized in the field of electronics based on direct digital frequency synthesis, and is limited by the properties of electronic devices, and the frequency and bandwidth of the generated arbitrary waveform signal are relatively low, usually hundreds of MHz to several GHz. In recent years, with the development of photonics technology, researchers have begun to replace conventional electronic devices with photonics devices to generate arbitrary microwave waveforms, thereby solving the limitations that electronic devices have in terms of frequency and bandwidth. For example: a scheme of generating an arbitrary waveform by performing a single manipulation control on a broadband spectrum signal by a spatial light modulator or a programmable light processor on a basis of a spectrum (see [ z.jiang, d.e.laird, and a.m.weiner, "Optical acquisition wave generation and characterization using a spectral line-by-line control," Journal of light Technology 24(7), 2487-; an arbitrary waveform generation scheme based on optical frequency combs (see [ W.Xie, Z.Xia, Q.Zhou, H.Shi, Y.Dong, and W.Hu, "Photonic generation of low phase noise transmitted microwave wave forms with large time-base product," Optics Express 23(14), "18070-18079 (2015) ]; a generation scheme based on two cascaded Mach-Zehnder modulators as pulse shapers (see [ y.he, y.jiang, y.zi, g.bai, j.tiana, y.xia, x.zhang, r.dong, and h.luo, "Photonic microwave wave for generation based on two-sided modulated single-drive Mach-Zehnder modulators," Optics Express 26(6),7829-7841(2018) ]). Most of the presently reported arbitrary waveform generation schemes are limited to high-speed electro-optical modulators, optical frequency combs and optical filters. The use of optical frequency combs and optical filters makes the system complex and costly on the one hand, and on the other hand the accuracy of the optical domain filter shaping is low resulting in poor signal quality of the generated signal.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve present scheme structure complicacy based on optical frequency comb and optical filter, the lower problem of light field filtering plastic precision, provide the waveform generation device based on semiconductor laser monocycle oscillation, include: the device comprises a main laser, a phase modulator, a microwave signal source, a 1 multiplied by n optical coupler, n single-period oscillation branches, a nx1 optical coupler and a photoelectric detector; the phase modulator is provided with an optical input end and a radio frequency input end; the photoelectric detector is provided with an input end and an output end;
the output end of the microwave signal source is connected with the radio frequency input end of the phase modulator;
wherein n is the number of the branches, the 1 xn optical coupler is provided with an optical input end and n output ends, the phase modulation optical signal is coupled into n branches after passing through the 1 xn optical coupler, and is coupled into n single-period oscillation branches from the corresponding output ends respectively; the n single-period oscillation branches are respectively coupled into the n x 1 optical coupler from corresponding ports and led out from the output end of the n x 1 optical coupler; the output end of the n x 1 optical coupler is connected with the input end of the photoelectric detector, and the microwave arbitrary waveform signal is led out from the output end of the photoelectric detector;
each of the n single-period oscillation branches comprises a first optical attenuator, an optical circulator, a slave laser, a second optical attenuator and an optical fiber phase shifter; the optical circulator is provided with an a port, a b port and a c port; the first optical attenuator, the optical circulator, the slave laser, the second optical attenuator and the optical fiber phase shifter are sequentially arranged on each branch along the light propagation direction;
in each branch, an optical signal passes through the main first optical attenuator, then is guided into the optical circulator through the port a of the optical circulator, is guided out through the port b of the optical circulator and is injected into the slave laser, and the optical signal emitted by the slave laser is guided into the optical circulator through the port b of the optical circulator and enters the second optical attenuator and the optical fiber phase shifter in sequence through the optical signals output by the port c of the optical circulator; the output signals of the fiber phase shifters are connected to the corresponding input terminals of the n × 1 optical couplers.
Further, the slave laser is a single-mode distributed feedback semiconductor laser or a distributed Bragg reflector laser without an isolator at the output end.
Further, the power in each branch of the 1 × n optical coupler and the n × 1 optical coupler is equally distributed.
The waveform generating device based on the single-period oscillation of the semiconductor laser generates the arbitrary waveform of the microwave by the following operation method:
step one, a main laser generates a continuous optical signal and inputs the continuous optical signal into a phase modulator, and a microwave signal source generates a frequency fmThe single-frequency microwave signal drives the phase modulator to obtain a phase modulated optical signal with high-order sidebands, and the frequency interval of each optical sideband is fm(ii) a The phase modulation optical signal is coupled into n single period oscillation branches through a 1 x n optical coupler, and each branch comprises a first optical attenuator, an optical circulator, a slave laser, a second optical attenuator and an optical fiber phase shifter; in the ith single-period oscillation branch, the operating currents of the first optical attenuator and the slave laser are set so that the single-period oscillation frequency of the slave laser is locked to if by the ith order modulated optical sideband of the phase-modulated optical signalm(i＝1,2,3…n)。
Step two, setting a second optical attenuator and an optical fiber phase shifter in the ith single-period oscillation branch to control the power and the phase of an output optical signal from the laser single-period oscillation in the branch so as to control if to be subjected to photoelectric conversionmFourier frequency components (i ═ 1,2,3 … n); the n multiplied by 1 optical coupler couples the n paths of optical signals output from the single-period oscillation of the laser and inputs the optical signals to the photoelectric detector to complete photoelectric conversion, so that the synthesis of n paths of Fourier frequency components is realized, and the customized microwave arbitrary waveform signals are obtained.
Further, it is characterized in that: the slave laser in the ith branch works at the frequency ifmInstead of injecting a locked state, the output from the laser is photo-electrically detected to generate a frequency ifm1,2,3 … n.
The utility model has the advantages that: compared with the prior art, on one hand, the device has the advantages of simple structure, low cost and easy control because the core device of the device is a commercial single-mode semiconductor laser without a high-speed electro-optical modulator, an optical frequency comb and an optical filter, and on the other hand, the semiconductor laser works in a single-period oscillation state to enable the generated microwave arbitrary waveform signal to have the advantages of high frequency, large bandwidth and flexible tuning.
Drawings
FIG. 1 is a schematic diagram of a waveform generating device based on single-period oscillation of a semiconductor laser;
FIG. 2 is a schematic diagram of the optical spectrum and the electrical spectrum of a triangular wave for generating microwaves;
fig. 3 is a schematic diagram of a generated microwave triangular wave signal.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The figure 1 is a schematic diagram of the waveform generating device based on the single-period oscillation of the semiconductor laser: the system comprises a main laser, a phase modulator, a microwave signal source, a 1 multiplied by n optical coupler, n single-period oscillation branches, a n multiplied by 1 optical coupler and a photoelectric detector; the phase modulator is provided with an optical input end and a radio frequency input end; the photoelectric detector is provided with an input end and an output end;
the output end of the microwave signal source is connected with the radio frequency input end of the phase modulator;
wherein n is the number of the branches, the 1 xn optical coupler is provided with an optical input end and n output ends, the phase modulation optical signal is coupled into n branches after passing through the 1 xn optical coupler, and is coupled into n single-period oscillation branches from the corresponding output ends respectively; the n single-period oscillation branches are respectively coupled into the n x 1 optical coupler from corresponding ports and led out from the output end of the n x 1 optical coupler; the output end of the n x 1 optical coupler is connected with the input end of the photoelectric detector, and the microwave arbitrary waveform signal is led out from the output end of the photoelectric detector;
each of the n single-period oscillation branches comprises a first optical attenuator, an optical circulator, a slave laser, a second optical attenuator and an optical fiber phase shifter; the optical circulator is provided with an a port, a b port and a c port; the first optical attenuator, the optical circulator, the slave laser, the second optical attenuator and the optical fiber phase shifter are sequentially arranged on each branch along the light propagation direction;
in each branch, an optical signal passes through the main first optical attenuator, then is guided into the optical circulator through the port a of the optical circulator, is guided out through the port b of the optical circulator and is injected into the slave laser, and the optical signal emitted by the slave laser is guided into the optical circulator through the port b of the optical circulator and enters the second optical attenuator and the optical fiber phase shifter in sequence through the optical signals output by the port c of the optical circulator; the output signals of the fiber phase shifters are connected to the corresponding input terminals of the n × 1 optical couplers.
Fig. 1 is a schematic diagram showing the connection relationship between the technical features of the device according to the present embodiment, and the shape of each component in fig. 1 is only illustrative and is not limited to the shape and structure.
The utility model relates to a waveform generation device and method based on semiconductor laser monocycle oscillation's concrete theory of operation as follows:
the utility model discloses mainly inject the nonlinear dynamics state of monocycle oscillation of semiconductor laser based on the light. A periodic waveform having an arbitrary waveform shape can be fourier series expanded, i.e., contains a fundamental sine (cosine) wave component and a series of harmonic components. Therefore, a desired microwave waveform signal can be produced by generating and synthesizing microwave signals corresponding to the sine (cosine) wave component and the harmonic component of the fundamental frequency in the time domain. Injecting the n slave lasers into one master laser simultaneously, so that the n slave lasers work in a single-period oscillation state, and the corresponding single-period oscillation frequency meets a harmonic frequency relation; the output light of the master laser is subjected to phase modulation, and the generated high-order phase modulation optical sidebands sequentially lock the single-period oscillation optical signals of the slave lasers; the single-period oscillation optical signals output from the lasers are subjected to beat frequency by the photoelectric detectors to generate single-frequency microwave signals corresponding to Fourier frequencies and are synthesized; and controlling the optical attenuators and the optical fiber phase shifters of all branches according to the required microwave arbitrary waveform signals, so as to control the power and the phase of the output optical signals, namely the Fourier frequency components to be subjected to photoelectric conversion, from the laser single-period oscillation, and obtain the microwave arbitrary waveform generation.
The utility model relates to a waveform generation method based on semiconductor laser monocycle oscillation's concrete step does:
step one, a main laser generates a continuous optical signal and inputs the continuous optical signal into a phase modulator, and a microwave signal source generates a frequency fmThe single-frequency microwave signal drives the phase modulator to obtain a phase modulated optical signal with high-order sidebands, and the frequency interval of each optical sideband is fm(ii) a The phase modulation optical signal is coupled into n single period oscillation branches through a 1 x n optical coupler, and each branch comprises a first optical attenuator, an optical circulator, a slave laser, a second optical attenuator and an optical fiber phase shifter; in the ith single-period oscillation branch, the operating currents of the first optical attenuator and the slave laser are set so that the single-period oscillation frequency of the slave laser is locked to if by the ith order modulated optical sideband of the phase-modulated optical signalm(i＝1,2,3…n)。
Step two, setting a second optical attenuator and an optical fiber phase shifter in the ith single-period oscillation branch to control the power and the phase of an output optical signal from the laser single-period oscillation in the branch so as to control if to be subjected to photoelectric conversionmFourier frequency components (i ═ 1,2,3 … n); the n multiplied by 1 optical coupler couples the n paths of optical signals output from the single-period oscillation of the laser and inputs the optical signals to the photoelectric detector to complete photoelectric conversion, so that the synthesis of n paths of Fourier frequency components is realized, and the customized microwave arbitrary waveform signals are obtained.
Further, it is characterized in that: the slave laser in the ith branch works at the frequency ifmInstead of injecting a locked state, the output from the laser is photo-electrically detected to generate a frequency ifm1,2,3 … n.
In order to facilitate understanding of the technical solution of the present invention, the following description is made on the principle of the above device by taking the generation of the microwave triangular waveform as an example:
the periodic triangular wave f (t) can be represented as a superimposed fourier series:
where A and ω are the amplitude and frequency, respectively, of f (t). It can be seen that the triangular wave f (t) contains mainly harmonic components in the frequency domain equal to 1,3,5 times the repetition frequency f ═ ω/2 pi, where frequency components above the 5 th harmonic are negligible due to the smaller amplitude. Therefore, the 1 st, 3 rd and 5 th harmonic components with stable phase relation generated from the single-period oscillation of the laser according to the present invention can be utilized to synthesize to generate the microwave triangular waveform. Fig. 2 is a schematic diagram of optical spectrum and electric spectrum based on the device and method of the present invention for generating microwave triangular wave: the first row is a schematic of the optical and electrical spectra of the generated 1 st harmonic, the second row is a schematic of the optical and electrical spectra of the generated 3 rd harmonic, and the third row is a schematic of the optical and electrical spectra of the generated 5 th harmonic; the ith harmonic has an optical spectrum that includes two major optical frequency components fMLAnd fML-ifmWherein f isMLIs a regenerated main laser frequency component, fMLThe components carry high order phase modulation sidebands with a frequency separation f between the sidebandsm(ii) a Under i-order phase modulation sideband locking, fMLAnd fML-ifmTwo optical frequency components beat frequency generation frequency ifm1,3, 5. Each output from the single-period oscillation state of the laser corresponds to a harmonic in the Fourier series expansion, and the harmonic is obtained from the Fourier transform formula of the triangular waveAnd adjusting the amplitude and the phase of each Fourier frequency, adjusting a corresponding optical attenuator and an optical fiber phase shifter, and generating a microwave triangular wave waveform signal at the output end of the photoelectric detector. Fig. 3 is a schematic diagram of a microwave triangular waveform generated according to the present invention.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and it should be understood that any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (3)
1. The waveform generating device based on the single-period oscillation of the semiconductor laser is characterized by comprising a main laser, a phase modulator, a microwave signal source, a 1 multiplied by n optical coupler, n single-period oscillation branches, a n multiplied by 1 optical coupler and a photoelectric detector; the phase modulator is provided with an optical input end and a radio frequency input end; the photoelectric detector is provided with an input end and an output end;
the output end of the microwave signal source is connected with the radio frequency input end of the phase modulator;
wherein n is the number of the branches, the 1 xn optical coupler is provided with an optical input end and n output ends, the phase modulation optical signal is coupled into n branches after passing through the 1 xn optical coupler, and is coupled into n single-period oscillation branches from the corresponding output ends respectively; the n single-period oscillation branches are respectively coupled into the n x 1 optical coupler from corresponding ports and led out from the output end of the n x 1 optical coupler; the output end of the n x 1 optical coupler is connected with the input end of the photoelectric detector, and the microwave arbitrary waveform signal is led out from the output end of the photoelectric detector;
each of the n single-period oscillation branches comprises a first optical attenuator, an optical circulator, a slave laser, a second optical attenuator and an optical fiber phase shifter; the optical circulator is provided with an a port, a b port and a c port; the first optical attenuator, the optical circulator, the slave laser, the second optical attenuator and the optical fiber phase shifter are sequentially arranged on each branch along the light propagation direction;
in each branch, an optical signal passes through the first optical attenuator, then is guided into the optical circulator through the port a of the optical circulator, is guided out from the port b of the optical circulator and is injected into the slave laser, and the optical signal emitted by the slave laser is guided into the optical circulator through the port b of the optical circulator and enters the second optical attenuator and the optical fiber phase shifter in sequence; the output signals of the fiber phase shifters are connected to the corresponding input terminals of the n × 1 optical couplers.
2. The waveform generation apparatus based on the monocycle oscillation of a semiconductor laser as set forth in claim 1, wherein: the slave laser is a single-mode distributed feedback semiconductor laser or a distributed Bragg reflection laser without an isolator at the output end.
3. The waveform generation apparatus based on the monocycle oscillation of a semiconductor laser as set forth in claim 1, wherein: and the power in each branch of the 1 x n optical coupler and the n x 1 optical coupler is evenly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020858366.3U CN211958239U (en) | 2020-05-21 | 2020-05-21 | Waveform generating device based on semiconductor laser unit monocycle oscillation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020858366.3U CN211958239U (en) | 2020-05-21 | 2020-05-21 | Waveform generating device based on semiconductor laser unit monocycle oscillation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211958239U true CN211958239U (en) | 2020-11-17 |
Family
ID=73170875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020858366.3U Active CN211958239U (en) | 2020-05-21 | 2020-05-21 | Waveform generating device based on semiconductor laser unit monocycle oscillation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211958239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115001917A (en) * | 2022-08-01 | 2022-09-02 | 烟台初心航空科技有限公司 | Modulation signal generation method for radar communication integration |
-
2020
- 2020-05-21 CN CN202020858366.3U patent/CN211958239U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115001917A (en) * | 2022-08-01 | 2022-09-02 | 烟台初心航空科技有限公司 | Modulation signal generation method for radar communication integration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10901247B2 (en) | Optical feedback-based repetitive frequency adjustable optical frequency comb | |
| JP6808727B2 (en) | Device for light generation of arbitrary microwave signals with linear frequency modulation | |
| CN109581301A (en) | Double chirp frequency doubling signal generating devices and its method based on double-parallel modulator | |
| CN108933379A (en) | Laser frequency-offset-lock system | |
| CN106027153A (en) | Method for generating 60GHz millimeter waves based on new double-sideband Mach-Zehnder modulator | |
| CN104570545A (en) | All-optical tunable generation device of wide band linear frequency modulated signals | |
| CN103560769A (en) | Arbitrary waveform generator and method for generating arbitrary waveform | |
| CN110708123B (en) | Semiconductor laser-based double-chirp microwave signal generation device and method | |
| CN105763260A (en) | Device and method of generating triangular waves by using phase modulator and Sagnac ring | |
| CN211958239U (en) | Waveform generating device based on semiconductor laser unit monocycle oscillation | |
| Li et al. | Photonic Generation of Precisely $\pi $ Phase-Shifted Binary Phase-Coded Microwave Signal | |
| CN111478176A (en) | Waveform generating device and method based on semiconductor laser unit monocycle oscillation | |
| CN110911946B (en) | Comb-distance-adjustable low-phase-noise microwave frequency comb generator | |
| CN111010172B (en) | Frequency-tunable frequency-doubling triangular wave and square wave generating device and method | |
| Zhang et al. | Photonic generation of linear frequency-modulated waveform with improved time-bandwidth product | |
| CN206272058U (en) | A kind of adjustable frequency comb of repetition rate produced based on bulk of optical feedback | |
| CN113972953A (en) | Triangular waveform generator based on two single-drive Mach-Zehnder modulators | |
| CN110572213A (en) | Injection locking and nonlinear modulation based arbitrary waveform generation method | |
| CN106067650A (en) | Based on the microwave generator of warbling amplifying feedback laser | |
| CN109639364A (en) | A kind of multichannel arbitrary carry system phase-coded signal optics generation device and production method | |
| CN110045357B (en) | Linear frequency modulation signal generating device | |
| CN112421373A (en) | Cold atom interference phase modulation type single-sideband Raman light generation method and system | |
| Zhang et al. | Dual-chirp microwave waveform generation for radar application based on an optically injected semiconductor laser | |
| CN114070412B (en) | Photon reconfigurable waveform generation method and device | |
| CN105490135B (en) | A kind of millimeter-wave frequency generation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |