CN109346913B - Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line - Google Patents
Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line Download PDFInfo
- Publication number
- CN109346913B CN109346913B CN201811038662.2A CN201811038662A CN109346913B CN 109346913 B CN109346913 B CN 109346913B CN 201811038662 A CN201811038662 A CN 201811038662A CN 109346913 B CN109346913 B CN 109346913B
- Authority
- CN
- China
- Prior art keywords
- femtosecond laser
- frequency
- optical fiber
- optical
- locking
- 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
Classifications
-
- 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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
-
- 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
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- 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
- H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection
-
- 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
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
- H01S3/2391—Parallel arrangements emitting at different wavelengths
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Automation & Control Theory (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a double-femtosecond laser optical frequency comb locking device based on an optical fiber delay line, which comprises a femtosecond laser, a carrier envelope offset frequency locking system, an optical fiber Bragg grating, a wavelength division multiplexer, a 2 multiplied by 2 optical fiber beam splitter, a Faraday optical rotation mirror, an optical fiber delay link, an adjustable dispersion compensation system, an acousto-optic modulator, a Faraday optical rotation mirror, a photoelectric detector, a frequency mixer, a phase-locked controller, a radio frequency reference and an electrical frequency multiplier; the 2 x 2 optical fiber beam splitter comprises four ports, namely a port, b port, c port and d port; the device is suitable for two communication waveband femtosecond lasers with a certain repetition frequency difference, the repetition frequencies of the two lasers are locked by using a kilometer-level optical fiber delay link to generate a fixed frequency difference, and finally, the carrier envelope offset frequency is locked by using a self-reference interferometer, so that the operation of the double-pulse femtosecond laser device is finally realized. The device has the advantages of simple structure, low cost, adjustable repetition frequency difference and the like.
Description
Technical Field
The invention relates to the field of femtosecond laser ranging and ultrafast spectroscopy based on pulse flight time, in particular to a double-femtosecond laser optical frequency comb locking device based on an optical fiber delay line. The repetition frequency difference of the two laser output pulse sequences in the device can be locked to any frequency value, and the device is suitable for the double-femtosecond laser optical frequency comb locking of a femtosecond laser with a communication waveband.
Background
Optical frequency combs have been invented since the nineties and have been widely used in measurement fields such as time frequency reference, distance measurement, spectroscopy, etc. The two femtosecond laser optical frequency combs with constant repetition frequency difference and stable carrier envelope offset frequency are called a double femtosecond laser optical frequency comb system. In the double femtosecond laser optical frequency comb system, due to the existence of the repetition frequency difference of two pulse sequences, one pulse sequence samples the other pulse sequence, and an optical oscillation frequency signal with an oscillation frequency of a hundred terahertz wave band can be down-sampled to a gigahertz electric signal through the detection of a photoelectric detector. The time domain and frequency domain information of the femtosecond pulse optical signal can be accurately calculated reversely from the electrical signal, and the precise measurement based on the double-femtosecond laser optical frequency comb system is realized. In 2009, i.coddington et al, national institute of standards and technology, of the united states, implemented large-scale absolute distance precision measurement using a dual femtosecond laser optical frequency comb system, with a measurement target distance of 30km, a measurement precision of <5nm, and a measurement uncertainty of 10-13. The technology of using a double femtosecond laser optical frequency comb system to measure the molecular characteristic absorption spectrum is also leading in the world by the national institute of standards and technology, and the research group uses the double femtosecond laser optical frequency comb systems with different wave bands and combines the methods of optical asynchronous downsampling and time domain Fourier transform to measure the characteristic absorption spectrum of HCN molecules, water molecules and the like, so that the method has high consistency with the result in the HITRAN database.
The locking device of the double-femtosecond laser optical frequency comb with excellent performance is the key for realizing the operation of the double-femtosecond laser optical frequency comb. The low-noise double-femtosecond laser optical frequency comb covering various optical bands (800nm, 1550nm and 2000nm bands) is widely applied to the measurement fields of distance measurement, spectroscopy and the like. At present, two methods are mainly used for realizing the double femtosecond laser optical frequency comb. The first method is to lock the repetition frequencies of two femtosecond lasers to two radio frequency references with different frequencies, and then lock the carrier envelope offset frequency of the two lasers to the same radio frequency reference, thereby realizing the operation of two femtosecond laser optical frequency combs with repetition frequency difference. However, since the optical frequency is referenced to the rf reference, no matter how to improve the performance of the phase-locked system, the optical frequency will have a large residual noise, which results in a decrease in the coherence of the two femtosecond lasers. The second approach is to lock the repetition rate of the two femtosecond lasers to two different frequency optical frequency references, i.e., two optical metastables with slightly different frequencies. And then, the carrier envelope offset frequencies of the two lasers are locked to the same radio frequency reference, so that the operation of the two femtosecond laser optical frequency combs with repeated frequency difference is realized. However, the ultrastable cavity is limited by the disadvantages of complex structure, high cost, high manufacturing cost and the like, and is not beneficial to popularization.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a double-femtosecond laser optical frequency comb locking device based on an optical fiber delay line, which is suitable for two communication waveband femtosecond lasers with a certain repetition frequency difference, uses a kilometer-level optical fiber delay link to lock the repetition frequencies of the two lasers to generate a fixed frequency difference, and finally uses a self-reference interferometer to realize the locking of carrier envelope offset frequency and finally realizes the operation of a double-pulse femtosecond laser device. The device has the advantages of simple structure, low cost, adjustable repetition frequency difference and the like.
The purpose of the invention is realized by the following technical scheme:
a double-femtosecond laser optical frequency comb locking device based on an optical fiber delay line comprises a first femtosecond laser, a second femtosecond laser, a first femtosecond laser carrier envelope offset frequency locking system, a second femtosecond laser carrier envelope offset frequency locking system, a first optical fiber Bragg grating, a second optical fiber Bragg grating, a first wavelength division multiplexer, a 2 x 2 optical fiber beam splitter, a Faraday optical rotation mirror, an optical fiber delay link, an adjustable dispersion compensation system, an acousto-optic modulator, a Faraday optical rotation mirror, a second wavelength division multiplexer, a first photoelectric detector, a second photoelectric detector, a first frequency mixer, a second frequency mixer, a first phase lock controller, a second phase lock controller, a radio frequency reference and an electrical frequency multiplier; the first femtosecond laser carrier envelope offset frequency locking system and the second femtosecond laser carrier envelope offset frequency locking system are respectively composed of a femtosecond laser, a spectrum stretcher, an optical frequency doubling crystal, a photoelectric detector, a radio frequency reference, a digital phase discriminator and a phase-locked controller; the 2 x 2 optical fiber beam splitter comprises four ports, namely a port, b port, c port and d port;
the pulse sequences output by the first femtosecond laser and the second femtosecond laser respectively realize the locking of carrier envelope offset frequency through a first femtosecond laser carrier envelope offset frequency locking system and a second femtosecond laser carrier envelope offset frequency locking system, and the frequency of the radio frequency reference is multiplied by an electrical frequency multiplier; the pulse sequence output by the first femtosecond laser sequentially passes through the first fiber Bragg grating and the first wavelength division multiplexer and then enters the a end of the 2 multiplied by 2 fiber beam splitter, the pulse sequence output by the c end of the 2 multiplied by 2 fiber beam splitter returns to the b end after passing through the Faraday rotator, the pulse sequence output by the d end of the 2 multiplied by 2 fiber beam splitter sequentially passes through the fiber delay link, the adjustable dispersion compensation system, the acousto-optic modulator and the Faraday rotator and then returns to the b end, the pulse sequence output by the b end passes through the second wavelength division multiplexer and the first photoelectric detector, after the signal output by the first photodetector and the frequency-doubled signal of the radio frequency reference are mixed by the first mixer, the mixing signal is input to a first phase-locking controller, and the first phase-locking controller controls a repetition frequency regulator in the first femtosecond laser to realize optical frequency locking of the first femtosecond laser;
the pulse sequence output by the second femtosecond laser sequentially passes through the second fiber Bragg grating and the first wavelength division multiplexer and then enters the a end of the 2 x 2 fiber beam splitter, the pulse sequence output by the c end of the 2 x 2 fiber beam splitter returns to the b end after passing through the Faraday rotator, the pulse sequence output by the d end of the 2 x 2 fiber beam splitter sequentially passes through the fiber delay link, the adjustable dispersion compensation system, the acousto-optic modulator and the Faraday rotator and then returns to the b end, the pulse sequence output by the b end passes through the second wavelength division multiplexer and the second photoelectric detector, after the signal output by the second photodetector and the frequency-doubled signal of the radio frequency reference are mixed by the second mixer, and the mixing signal is input to a second phase-locked controller, and the second phase-locked controller controls a repetition frequency regulator in the second femtosecond laser to realize the optical frequency locking of the second femtosecond laser.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. the repetition frequency locking part in the technical scheme depends on an optical delay link in the kilometer order, and does not contain an expensive high-precision optical frequency reference source, such as an optical super-stable cavity. The optical super-stable cavity has the defects of complex structure, high cost, high manufacturing cost and the like, and is not beneficial to popularization. The use of the optical delay link in the invention makes the whole system simpler and has low cost.
2. In the technical scheme, the continuous adjustment of the repeated frequency difference of the two femtosecond laser devices can be realized by changing the dispersion compensation amount of the dispersion compensation system.
3. The technical scheme is suitable for the femtosecond laser with the output pulse wavelength of any wave band (800nm, 1040nm, 1550nm and 2000nm) in principle.
4. The device has simple structure, the repetition frequency difference of the pulse sequences output by the two lasers can be locked to any frequency value by adjusting the compensation quantity of the dispersion compensation system, and the locked two lasers can obtain time domain interference signals with high coherence, thereby being beneficial to wide popularization.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of a composition structure of a femtosecond laser carrier envelope offset frequency locking system.
Reference numerals: 1-a first femtosecond laser; 2-a second femtosecond laser; 3-a first femtosecond laser carrier envelope offset frequency locking system; 4-a second femtosecond laser carrier envelope offset frequency locking system; 5-a first fiber bragg grating; 6-a second fiber bragg grating; 7-a first wavelength division multiplexer; an 8-2 x 2 fiber splitter; a 9-Faraday rotation mirror; 10-fiber delay link; 11-tunable dispersion compensation system; 12-an acousto-optic modulator; 13-a faraday rotator mirror; 14-a second wavelength division multiplexer; 15-a first photodetector; 16-a second photodetector; 17-a first mixer; 18-a second mixer; 19-a first phase lock controller; 20-a second phase-lock controller; 21-radio frequency reference; 22-an electrical frequency multiplier; 23-a femtosecond laser; 24-a spectral stretcher; 25-optical frequency doubling crystals; 26-a photodetector; 27-radio frequency reference; 28-a digital phase detector; 29-phase lock controller. Wherein the solid lines represent optical paths and the dashed lines represent electrical lines.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, in a dual femtosecond laser optical frequency comb locking device based on an optical fiber delay line, pulse sequences output by a first femtosecond laser 1 and a second femtosecond laser 2 respectively realize locking of carrier envelope offset frequencies by a first femtosecond laser carrier envelope offset frequency locking system 3 and a second femtosecond laser carrier envelope offset frequency locking system 4, and a radio frequency reference 21 is frequency-doubled by an electrical frequency multiplier 22; the pulse sequence output by the first femtosecond laser 1 sequentially passes through the first fiber Bragg grating 5 and the first wavelength division multiplexer 7 and then enters the a end of the 2 x 2 fiber beam splitter 8, the pulse sequence output by the c end of the 2 x 2 fiber beam splitter 8 passes through the Faraday optical rotation mirror 9 and then returns to the b end, the pulse sequence output by the d end of the 2 x 2 fiber beam splitter 8 sequentially passes through the fiber delay link 10, the adjustable dispersion compensation system 11, the acousto-optic modulator 12 and the Faraday optical rotation mirror 13 and then returns to the b end, the pulse sequence output by the b end passes through the second wavelength division multiplexer 14 and the first photoelectric detector 15, the signal output by the first photoelectric detector 15 and the frequency doubling signal of the radio frequency reference 21 are mixed by the first mixer 17, the frequency mixing signal is input to the first phase lock controller 19, the first phase lock controller 19 controls the repetition frequency regulator in the first femtosecond laser 1, optical frequency locking of the first femtosecond laser 1 is realized;
the pulse sequence output by the second femtosecond laser 2 sequentially passes through the second fiber Bragg grating 6 and the first wavelength division multiplexer 7 and then enters the a end of the 2 x 2 fiber beam splitter 8, the pulse sequence output by the c end of the 2 x 2 fiber beam splitter 8 passes through the Faraday optical rotation mirror 9 and then returns to the b end, the pulse sequence output by the d end of the 2 x 2 fiber beam splitter 8 sequentially passes through the fiber delay link 10, the adjustable dispersion compensation system 11, the acousto-optic modulator 12 and the Faraday optical rotation mirror 13 and then returns to the b end, the pulse sequence output by the b end passes through the second wavelength division multiplexer 14 and the second photoelectric detector 16, the signal output by the second photoelectric detector 16 and the frequency doubling signal of the radio frequency reference 21 are mixed by the second mixer 18, the mixed signal is input to the second phase-locking controller 20, the second phase-locking controller 20 controls the repetition frequency regulator in the second femtosecond laser 2, optical frequency locking of the second femtosecond laser 2 is achieved.
Specifically, two optical fibers, namely a first femtosecond laser 1 and a second femtosecond laser 2, of communication bands with slightly different output pulse repetition frequencies are used for locking the repetition frequency and the carrier envelope offset frequency. The repetition frequency difference of the first femtosecond laser 1 and the second femtosecond laser 2 is generally in the kilohertz magnitude, and the output spectrum range only needs to cover the range of 1540-1560 nm. The first fiber bragg grating 5 with the center wavelength of 1540nm and the filtering bandwidth of 1nm is used as an optical filter to filter the pulse sequence output by the first femtosecond laser 1. Similarly, the pulse train output from the second femtosecond laser 2 is filtered using the second fiber bragg grating 6 having a center wavelength of 1560nm and a filter bandwidth of 1nm as an optical filter. The two filtered narrow band spectra are combined by a 1540/1560 first wavelength division multiplexer 7. If the sum of the power of the two wavelengths after combination is lower than 20mW, a communication waveband optical fiber amplifier is needed to amplify the two narrow-band spectrums to 20mW together. The two pulse trains are incident into the a-side of a 2 x 2 fiber splitter 8. The pulse sequence output by the end d is returned to the end b through the Faraday optical rotation mirror 9 after being output by the end c of the 2 multiplied by 2 optical fiber beam splitter 8, and the pulse sequence output by the end d is returned to the original path of the optical fiber Faraday mirror 13 after passing through the optical fiber delay link 10 with the length of 140m, the adjustable dispersion compensation system 11 and the acoustic optical modulator 12 (the modulation frequency is 50MHz), and is combined at the other end of the beam splitter. The pulse sequence after being combined is separated into 1540nm and 1560nm by the 1540/1560 second wavelength division multiplexer 14, and enters the two high-speed first photodetectors 15 and the second photodetector 16 of indium gallium arsenide respectively. Radio frequency interference signals with the center frequency of 100MHz can be obtained on the first photodetector 15 and the second photodetector 16. Amplified to >0dBm through a bandpass filter with a center wavelength of 100MHz and a bandwidth of 24MHz and an electrical amplifier. The driving signal of the acousto-optic modulator is a highly stable radio frequency reference 21, which is frequency-multiplied using an electrical frequency multiplier 22. The interference signal output by the first photodetector 15 and the frequency multiplication signal of the acousto-optic modulator driving signal are mixed by using the first mixer 17, so that an error signal related to the repetition frequency of the first femtosecond laser 1 can be obtained, and the error signal is loaded on the repetition frequency regulator of the first femtosecond laser 1 after passing through the first phase-locked controller 19, so that the repetition frequency of the first femtosecond laser 1 is locked to the optical fiber link, namely, the cavity length of the first femtosecond laser 1 is locked to one integral multiple of the optical fiber link. Similarly, the interference signal output by the second photodetector 16 is mixed with the frequency-doubled signal of the driving signal of the acousto-optic modulator to obtain an error signal related to the repetition frequency of the second femtosecond laser 2, and the error signal passes through the second phase-locked controller 20 and is then loaded onto the repetition frequency adjuster of the second femtosecond laser 2, so as to lock the repetition frequency of the second femtosecond laser 2 to the optical fiber link. Because the optical fiber with kilometer-order length has dispersion, the optical paths of the optical fiber to different wavelengths of two optical fiber lasers are different, so that the two lasers have repeated frequency difference after being locked, and the repeated frequency difference can be properly adjusted by adjusting a dispersion compensation system in an optical fiber link.
As shown in fig. 2, in this embodiment, the first femtosecond laser carrier envelope offset frequency locking system 3 and the second femtosecond laser carrier envelope offset frequency locking system 4 are both composed of a femtosecond laser 23, a spectrum stretcher 24, an optical frequency doubling crystal 25, a photodetector 26, a radio frequency reference 27, a digital phase detector 28, and a phase-locked controller 29. Pulse sequences output by the first femtosecond laser and the second femtosecond laser respectively pass through the high nonlinear optical fiber, the high nonlinear optical fiber is used as a spectrum stretcher, and the spectrum is stretched, so that the output spectrum range covers 1100nm to 2200 nm. The periodically polarized lithium niobate crystal is used as an optical frequency doubling crystal to frequency-double the spectrum near 2200nm to 1100nm, and the frequency-doubled spectrum and the spectrum of 1100nm are incident together to enter a photoelectric detector, so that a carrier envelope offset frequency signal can be obtained, and the signal is fed back and locked to the pumping current of a laser, thereby realizing the locking of the carrier envelope offset frequency.
The present invention is not limited to the above-described embodiments. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many changes and modifications to the invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. The double-femtosecond laser optical frequency comb locking device based on the optical fiber delay line is characterized by comprising a first femtosecond laser (1), a second femtosecond laser (2), a first femtosecond laser carrier envelope offset frequency locking system (3), a second femtosecond laser carrier envelope offset frequency locking system (4), a first optical fiber Bragg grating (5), a second optical fiber Bragg grating (6), a first wavelength division multiplexer (7), a 2 x 2 optical fiber beam splitter (8), a Faraday optical rotation mirror (9), an optical fiber delay link (10), an adjustable dispersion compensation system (11), an acoustic-optical modulator (12), an optical rotation mirror (13), a second wavelength division multiplexer (14), a first photoelectric detector (15), a second photoelectric detector (16), a first frequency mixer (17), a second frequency mixer (18), a first phase-locking controller (19), A second phase-locked controller (20), a radio frequency reference (21) and an electrical frequency multiplier (22); the 2 x 2 optical fiber beam splitter (8) comprises four ports a, b, c and d;
the first femtosecond laser (1) and the second femtosecond laser (2) have a repetition frequency difference; the pulse sequences output by the first femtosecond laser (1) and the second femtosecond laser (2) respectively realize the locking of carrier envelope offset frequency through a first femtosecond laser carrier envelope offset frequency locking system (3) and a second femtosecond laser carrier envelope offset frequency locking system (4), and the frequency of the radio frequency reference (21) is multiplied by an electrical frequency multiplier (22); the pulse sequence output by the first femtosecond laser (1) sequentially passes through a first fiber Bragg grating (5) and a first wavelength division multiplexer (7) and then enters an a end of a 2 x 2 optical fiber beam splitter (8), the pulse sequence output by a c end of the 2 x 2 optical fiber beam splitter (8) returns to a b end after passing through a Faraday optical rotation mirror (9), the pulse sequence output by a d end of the 2 x 2 optical fiber beam splitter (8) sequentially passes through an optical fiber delay link (10), an adjustable dispersion compensation system (11), an acousto-optic modulator (12) and a Faraday optical rotation mirror (13) and then returns to the b end, the pulse sequence output by the b end passes through a second wavelength division link (14) and a first photoelectric detector (15), a first frequency mixer (17) mixes a signal output by the first photoelectric detector (15) with a frequency doubling signal of a radio frequency reference (21) and then inputs the mixed signal to a first phase lock controller (19), controlling a repetition frequency regulator in the first femtosecond laser (1) by a first phase-locking controller (19) to realize optical frequency locking of the first femtosecond laser (1);
the pulse sequence output by the second femtosecond laser (2) sequentially passes through a second fiber Bragg grating (6) and a first wavelength division multiplexer (7) and then enters an a end of a 2 x 2 optical fiber beam splitter (8), the pulse sequence output by a c end of the 2 x 2 optical fiber beam splitter (8) returns to a b end after passing through a Faraday optical rotation mirror (9), the pulse sequence output by a d end of the 2 x 2 optical fiber beam splitter (8) sequentially passes through an optical fiber delay link (10), an adjustable dispersion compensation system (11), an acousto-optic modulator (12) and a Faraday optical rotation mirror (13) and then returns to the b end, the pulse sequence output by the b end passes through a second wavelength division link (14) and a second photoelectric detector (16), a second frequency mixer (18) mixes a signal output by the second photoelectric detector (16) and a frequency doubling signal of a radio frequency reference (21) and then inputs the mixed signal to a second phase locking controller (20), and a second phase-locked controller (20) controls a repetition frequency regulator in the second femtosecond laser (2) to realize the optical frequency locking of the second femtosecond laser (2).
2. The fiber delay line-based dual femtosecond laser optical frequency comb locking device according to claim 1, wherein the first femtosecond laser carrier envelope offset frequency locking system (3) and the second femtosecond laser carrier envelope offset frequency locking system (4) are composed of a femtosecond laser (23), a spectrum stretcher (24), an optical frequency doubling crystal (25), a photoelectric detector (26), a radio frequency reference (27), a digital phase detector (28) and a phase-locked controller (29); the femtosecond laser (23), the spectrum stretcher (24), the optical frequency doubling crystal (25), the photoelectric detector (26), the digital phase discriminator (28) and the phase-locked controller (29) are connected with each other in sequence; the digital phase detector (28) is connected with a phase-locking controller (29), and the phase-locking controller (29) is connected with the femtosecond laser (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038662.2A CN109346913B (en) | 2018-09-06 | 2018-09-06 | Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038662.2A CN109346913B (en) | 2018-09-06 | 2018-09-06 | Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109346913A CN109346913A (en) | 2019-02-15 |
| CN109346913B true CN109346913B (en) | 2020-10-27 |
Family
ID=65297018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811038662.2A Active CN109346913B (en) | 2018-09-06 | 2018-09-06 | Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109346913B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277724B (en) * | 2019-06-25 | 2021-01-08 | 中国人民解放军军事科学院国防科技创新研究院 | Adjustable high-repetition-frequency single-cavity double-phase-dry optical frequency comb light source |
| CN110895339B (en) * | 2019-11-01 | 2022-02-25 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
| CN112782725A (en) * | 2020-12-30 | 2021-05-11 | 华清瑞达（天津）科技有限公司 | High-precision GPS synchronization maintaining module |
| CN113206434B (en) * | 2021-05-07 | 2022-08-02 | 北京邮电大学 | Pre-compensation feedback control system and method for frequency difference locking of fiber laser |
| CN113300207B (en) * | 2021-06-24 | 2022-07-12 | 东莞理工学院 | Asynchronous locking method and device for repetition frequency of ultrashort pulse laser |
| CN115459041A (en) * | 2022-09-23 | 2022-12-09 | 中国科学院福建物质结构研究所 | Optical frequency comb generation device, application system and method |
| CN116047535B (en) * | 2022-12-30 | 2024-03-22 | 电子科技大学 | Dual-optical frequency comb time-of-flight ranging system based on dispersion Fourier transform |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1917306A (en) * | 2006-08-10 | 2007-02-21 | 天津大学 | Adjustable femtosecond pulse generator in dual wavelengh synchronized accuratly |
| WO2008044839A1 (en) * | 2006-10-11 | 2008-04-17 | Korea Research Institute Of Standards And Science | Optical frequency synthesizer and optical frequency synthesizing method using femtosecond laser optical injection locking |
| CN102349205A (en) * | 2009-03-06 | 2012-02-08 | Imra美国公司 | Optical scanning and imaging systems based on dual pulsed laser systems |
| US8565609B2 (en) * | 2010-12-15 | 2013-10-22 | Raytheon Company | Distribution system for optical reference |
| CN103633537A (en) * | 2013-11-13 | 2014-03-12 | 中国科学院物理研究所 | Low noise fiber laser frequency combs device with controllable carrier envelope phase shift frequency |
| CN104155642A (en) * | 2014-06-14 | 2014-11-19 | 哈尔滨工业大学 | Traceable synchronous measurement ruler-based mixed double-light source laser range finding device and method |
| CN105446120A (en) * | 2015-11-25 | 2016-03-30 | 天津大学 | Optical fiber link time-frequency distribution device based on femtosecond laser and stabilizing method thereof |
| CN105826804A (en) * | 2016-05-27 | 2016-08-03 | 清华大学 | Light frequency reference fiber femtosecond light frequency comb with tunable broadband repetition frequency |
-
2018
- 2018-09-06 CN CN201811038662.2A patent/CN109346913B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1917306A (en) * | 2006-08-10 | 2007-02-21 | 天津大学 | Adjustable femtosecond pulse generator in dual wavelengh synchronized accuratly |
| WO2008044839A1 (en) * | 2006-10-11 | 2008-04-17 | Korea Research Institute Of Standards And Science | Optical frequency synthesizer and optical frequency synthesizing method using femtosecond laser optical injection locking |
| CN102349205A (en) * | 2009-03-06 | 2012-02-08 | Imra美国公司 | Optical scanning and imaging systems based on dual pulsed laser systems |
| US8565609B2 (en) * | 2010-12-15 | 2013-10-22 | Raytheon Company | Distribution system for optical reference |
| CN103633537A (en) * | 2013-11-13 | 2014-03-12 | 中国科学院物理研究所 | Low noise fiber laser frequency combs device with controllable carrier envelope phase shift frequency |
| CN104155642A (en) * | 2014-06-14 | 2014-11-19 | 哈尔滨工业大学 | Traceable synchronous measurement ruler-based mixed double-light source laser range finding device and method |
| CN105446120A (en) * | 2015-11-25 | 2016-03-30 | 天津大学 | Optical fiber link time-frequency distribution device based on femtosecond laser and stabilizing method thereof |
| CN105826804A (en) * | 2016-05-27 | 2016-08-03 | 清华大学 | Light frequency reference fiber femtosecond light frequency comb with tunable broadband repetition frequency |
Non-Patent Citations (2)
| Title |
|---|
| Dual-comb spectroscopy with a single free-running thulium-doped fiber laser;RUOYU LIAO 等;《OPTICS EXPRESS》;20180416;全文 * |
| Stabilizing carrier-envelope offset frequency of a femtosecond laser using heterodyne interferometry;XIAOSHENG ZHANG 等;《Optics Letters》;20160915;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109346913A (en) | 2019-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109346913B (en) | Double-femtosecond laser optical frequency comb locking device based on optical fiber delay line | |
| US10901247B2 (en) | Optical feedback-based repetitive frequency adjustable optical frequency comb | |
| US11287457B2 (en) | System and method for measuring time-frequency characteristic of high-frequency electromagnetic signal | |
| Ivanov et al. | Analysis of noise mechanisms limiting the frequency stability of microwave signals generated with a femtosecond laser | |
| US10585332B2 (en) | Periodic optical filter stabilized tunable comb generator | |
| Zhuang et al. | Electro‐optic frequency combs: Theory, characteristics, and applications | |
| CN106093598B (en) | Electromagnetic signal characteristic measuring system and method | |
| Kalubovilage et al. | Ultra-low phase noise microwave generation with a free-running monolithic femtosecond laser | |
| CN109193323A (en) | Lock the device and method of optical communicating waveband twin-laser frequency | |
| CN113055093B (en) | Tunable microwave photon filter with ultrahigh Q value | |
| CN110398292B (en) | High-sensitivity optical frequency comb clock jitter measurement method and system | |
| Van Gasse et al. | An on-chip III-V-semiconductor-on-silicon laser frequency comb for gas-phase molecular spectroscopy in real-time | |
| CN114361931B (en) | Ultra-low noise electro-optical frequency comb generating device | |
| Kalubovilage et al. | X-Band photonic microwaves with phase noise below− 180 dBc/Hz using a free-running monolithic comb | |
| CN105187131A (en) | Wavelength-tunable coherent light detection system and method based on supercontinuum | |
| Gozzard et al. | Simple stabilized radio-frequency transfer with optical phase actuation | |
| CN109031852A (en) | All solid state femtosecond laser frequency comb system | |
| Wong et al. | Photonic generation of frequency-tunable microwave signals using an array of uniformly spaced optical combs | |
| O’duill et al. | High Precision Estimation of Laser FM-Noise Using RF Quadrature Demodulation Techniques | |
| US20230291169A1 (en) | Frequency stablizing system and method for single-cavity multi-frequency comb | |
| Savchenkov et al. | Low Noise W-band Photonic Oscillator | |
| Bauer et al. | High-sensitivity dual-comb and cross-comb spectroscopy across the infrared using a widely tunable and free-running optical parametric oscillator | |
| Liu et al. | A reference-free dual-comb spectroscopy calibrated by passive devices | |
| CN115425512A (en) | Microwave generation method based on monolithic integrated orthogonal double soliton optical comb | |
| CN207542552U (en) | Photoelectric cascade microwave signal generating device based on gas absorption spectrum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |