CN105932527A - Double-frequency comb generation method and apparatus based on parallel frequency shifters and 3-mirror ring cavities having outer-cavity dispersion compensators - Google Patents
Double-frequency comb generation method and apparatus based on parallel frequency shifters and 3-mirror ring cavities having outer-cavity dispersion compensators Download PDFInfo
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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
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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
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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
- H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection
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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
- H01S3/10053—Phase control
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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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1307—Stabilisation of the phase
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Abstract
The invention discloses a double-frequency comb generation method and apparatus based on parallel frequency shifters and 3-mirror ring cavities having outer-cavity dispersion compensators, and belongs to the technical field of ultrafast lasers. The method includes the following steps: using a spectroscope to enable a frequency stabilized laser to provide two beams of source laser lights, generating a double optical frequency comb based on two acousto-optic frequency shifters which are in parallel arrangement and two 3-mirror ring cavities each of which contains an electro-optic modulator therein, using a frequency comb's spectrum scope which is generated from the expansion of dispersion compensators which are arranged outside the cavities, two binary channel signal-generators which reference the same frequency separately providing modulation driving signals to the acousto-optic frequency shifters and the electro-optic modulators, obtaining a heterodyne double optical frequency comb which enables interference signal frequencies outside comb teeth to assume an arithmetic progression order. The invention also provides a double frequency comb generation apparatus. The heterodyne double optical frequency comb is characterized by large spectrum scope and excellent frequency consistency. The heterodyne double optical frequency comb generation apparatus is advantaged by high systematic integration, simple structure, and low cost, etc.
Description
Technical field
The invention belongs to ultrafast laser technique, relate generally to a kind of compensate based on three mirror annular chamber intracavity modulations and chamber Laser with External Dispersive and also
The double optical frequency com of the heterodyne of connection formula dual-acousto-optic shift generates method and apparatus.
Background technology
Show as ultrashort laser pulse sequence in time domain owing to optical frequency com has, to show as pectination on frequency domain the most
The characteristic of spectrum so that it is obtain in fields such as pinpoint spectroscopic analysis, absolute distance measurement, optical maser wavelength calibration, time frequency signal transmission
Arrive extensive application.
In recent years, in pinpoint spectroscopic analysis with absolute distance measurement field, measuring method based on the double optical frequency com of heterodyne is not
Disconnected development, has become as its each important research direction in field.Frequency domain aspect, each comb between the double optical frequency com of heterodyne
The heterodyne interference signal of tooth is arithmetic progression distribution, it is simple to the interferometric information of high-precision each comb of extraction.Time domain aspect,
The time interval cyclically-varying of each pulse between the double optical frequency com of heterodyne, its measurement effect is consistent with pulse scanning mode,
Can significantly save the measurement time.
What the double optical frequency com of existing heterodyne generated that method is based primarily upon two set femtosecond frequency comb systems locks control mutually.But the party
In method, the frequency invariances of two set femtosecond frequency comb systems are limited by mutually locking control accuracy, simultaneously its realize apparatus structure complexity,
Cost is high, constrains and based on the double optical frequency com measuring method of heterodyne in pinpoint spectroscopic analysis and absolute distance measurement field enters one
Step development.It addition, the spectral region of optical frequency com has decisive role to the measurement scope in above-mentioned field with precision.Therefore,
Need heterodyne double optical frequency com generation method and apparatus of a kind of big spectral region, altofrequency concordance, low cost badly.
Summary of the invention
The purpose of the present invention is aiming at the problem that above-mentioned prior art exists, and proposes a kind of shift frequency in parallel and Laser with External Dispersive compensates three mirrors
Annular chamber double frequency comb generates method and apparatus, reaches to realize the double optics of heterodyne of big spectral region, altofrequency concordance, low cost
The purpose that frequency comb generates.
The purpose of the present invention is achieved through the following technical solutions:
A kind of shift frequency in parallel and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generation methods, and the method step is as follows:
The emergent light frequency of (1) frequency stabilized carbon dioxide laser is v0, the described emergent light device that is split after optical isolator is divided into two
Shu Jiguang, described two bundle laser are respectively by two acousto-optic modulation frequency shifters, the modulating frequency of said two acousto-optic modulation frequency shifter
Value is respectively f1And f2, two+1 grade of shift frequency diffraction light frequency values of bundle of said two acousto-optic modulation frequency shifter output are respectively v0+f1
And v0+f2, described two+1 grade of shift frequency diffraction light of bundle input two three mirror annular chambers respectively, each contain in two three mirror annular chambers
The modulating frequency of an electrooptic modulator be respectively f3And f4, said two three mirror annular chamber exports a branch of optical frequency com respectively,
Two-beam frequency comb each inputs a dispersion compensation device, a branch of optical frequency com that two dispersion compensation device each export
Constitute the double optical frequency com of heterodyne；
(2) in the double optical frequency com of above-mentioned heterodyne, the center comb frequency of two-beam frequency comb is respectively v0+f1And v0+f2, institute
The center comb frequency-splitting stating two-beam frequency comb is | f1-f2|, the center comb frequency offset frequency of described two-beam frequency comb
Locking；
(3) in the double optical frequency com of above-mentioned heterodyne, the repetition rate of two-beam frequency comb is respectively f3And f4, described two-beam
The repetition rate difference of frequency comb is | f3-f4|, the repetition rate alien frequencies locking of described two-beam frequency comb；
(4) in the double optical frequency com of above-mentioned heterodyne, the frequency of two-beam frequency comb the i-th rank comb is expressed as v0+f1+i×f3
And v0+f2+i×f4, the heterodyne interference signal frequency of described two-beam frequency comb the i-th rank comb is | f1-f2|+i×|f3-f4|,
The center comb frequency-splitting of described two-beam frequency comb | f1-f2| with repetition rate difference | f3-f4| meet | f1-f2|>|i|×|f3
-f4|, the heterodyne interference signal frequency of described two-beam frequency comb the i-th rank comb is arithmetic progression；
(5) modulated signal of the primary acousto-optic modulation frequency shifter of parallel configuration and secondary acousto-optic modulation frequency shifter is by same the dual pathways
Signal generator provides, and the modulated signal of above-mentioned two electrooptic modulator is provided by another double-channel signal generator, and two double
The reference frequency signal of channel signal generator is provided by same reference frequency oscillator.
A kind of shift frequency in parallel and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generating means, depend on the emitting light path of frequency stabilized carbon dioxide laser
Secondary configuration optical isolator and spectroscope；Described spectroscopical transmitted light path configures acousto-optic modulation frequency shifter A, at described sound
Configure on+1 grade of shift frequency optical diffraction of light modulation frequency shifter A three mirror annular chamber A, described three mirror annular chamber A by the first chamber mirror a,
Second chamber mirror a, the 3rd chamber mirror a and electrooptic modulator A composition ,+1 grade of shift frequency diffraction light of acousto-optic modulation frequency shifter A leads to successively
Crossing the first chamber mirror a, the second chamber mirror a, the 3rd chamber mirror a is arranged on the reflected light path of the second chamber mirror a, and the first chamber mirror a is arranged in
On the reflected light path of the 3rd chamber mirror a, the first chamber mirror a make from acousto-optic modulation frequency shifter A+1 grade of shift frequency diffraction light with from the
The reflection light light path of three chamber mirror a overlaps, and described electrooptic modulator A is arranged in the first chamber mirror a, the second chamber mirror a, the 3rd chamber mirror a
In between any two chamber mirrors in light path；In three mirror annular chamber A exterior arrangement dispersion compensation device A, described dispersion compensation device A
It is arranged on the transmitted light path of the second chamber mirror a；Configure reflecting mirror on described spectroscopical reflected light path successively, acousto-optic modulation moves
Frequently device B, configures three mirror annular chamber B, described three mirror annulars on+1 grade of shift frequency optical diffraction of described acousto-optic modulation frequency shifter B
Chamber B is made up of the first chamber mirror b, the second chamber mirror b, the 3rd chamber mirror b and electrooptic modulator B ,+the 1 of acousto-optic modulation frequency shifter B
Level shift frequency diffraction light passes sequentially through the first chamber mirror b, the second chamber mirror b, and the 3rd chamber mirror b is arranged on the reflected light path of the second chamber mirror b,
First chamber mirror b is arranged on the reflected light path of the 3rd chamber mirror b, and the first chamber mirror b makes+1 grade of shifting from acousto-optic modulation frequency shifter B
Frequently diffraction light overlaps with the reflection light light path from the 3rd chamber mirror b, described electrooptic modulator B be arranged in the first chamber mirror b, second
In chamber mirror b, the 3rd chamber mirror b between any two chamber mirrors in light path；Dispersion compensation device B, institute is configured outside three mirror annular chamber B
State dispersion compensation device B to be arranged on the transmitted light path of the second chamber mirror b；Reference frequency oscillator and double-channel signal generator A,
Double-channel signal generator B connects respectively, and described double-channel signal generator A and acousto-optic modulation frequency shifter A, acousto-optic modulation move
Frequently device B connects respectively, and described double-channel signal generator B is connected respectively with electrooptic modulator A, electrooptic modulator B.
The invention have the characteristics that and good result:
(1), compared with optical frequency coms double with existing heterodyne generate method, the present invention utilizes a frequency stabilized carbon dioxide laser for the double light of heterodyne
The generation process learning frequency comb provides source laser, and the double optical frequency com frequency invariance of the heterodyne generated is good.
(2) utilize three mirror annular chamber intracavity modulation formula optical frequency coms to generate method and apparatus and simplify the double optical frequency com of heterodyne
The system structure of generating means, reduces and realizes cost.
(3) parallel dual-acousto-optic shift method and apparatus coordinates synchronous pilot frequency actuation techniques to achieve in the double optical frequency com of heterodyne
The rrequency-offset-lock of heart comb frequency.
(4) intra-cavity phase modulator approach in Crossed Circle chamber coordinates synchronous pilot frequency actuation techniques to achieve the double optical frequency of heterodyne with device
The alien frequencies of comb repetition rate mutually locks.
(5) three mirror ring cavity structures make the unidirectional electrooptic modulator by intracavity of the laser in resonator cavity, effectively prevent electric light from adjusting
Burning of device processed, it is allowed to export the double optical frequency com of powerful heterodyne.
(6) outside resonator, place dispersion compensation device, can significantly reduce the reduction of annular chamber size, beneficially Resonant Intake System
And then promote the repetition rate of the double optical frequency com of heterodyne.
Accompanying drawing explanation
Fig. 1 compensates three mirror annular chamber double frequency comb generating means structural representations for shift frequency in parallel and Laser with External Dispersive.
In figure piece number explanation: 1 frequency stabilized carbon dioxide laser, 2 optical isolators, 3 beam splitters, 4 reflecting mirrors, 5 acousto-optic frequency shifters A, 6
Acousto-optic frequency shifters B, 7 three mirror annular chamber A, 8 first chamber mirror a, 9 second chamber mirror a, 10 the 3rd chamber mirror a, 11 3 mirror annulars
Chamber B, 12 first chamber mirror b, 13 second chamber mirror b, 14 the 3rd chamber mirror b, 15 electrooptic modulator A, 16 electrooptic modulator B,
17 dispersion compensation device A, 18 dispersion compensation device B, 19 reference frequency oscillators, 20 double-channel signal generator A, 21
Double-channel signal generator B.
Detailed description of the invention
Below in conjunction with the accompanying drawings the specific embodiment of the invention is described in further detail.
A kind of shift frequency in parallel and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generating means, on the emitting light path of frequency stabilized carbon dioxide laser 1
Configuration optical isolator 2 and spectroscope 3 successively；The transmitted light path of described spectroscope 3 configures acousto-optic modulation frequency shifter A5,
+ 1 grade of shift frequency optical diffraction of described acousto-optic modulation frequency shifter A5 configures three mirror annular chamber A7, described three mirror annular chamber A7
It is made up of the first chamber mirror a8, the second chamber mirror a9, the 3rd chamber mirror a10 and electrooptic modulator A15, acousto-optic modulation frequency shifter A5's
+ 1 grade of shift frequency diffraction light passes sequentially through the first chamber mirror a8, the second chamber mirror a9, and the 3rd chamber mirror a10 is arranged in the anti-of the second chamber mirror a9
Penetrating in light path, the first chamber mirror a8 is arranged on the reflected light path of the 3rd chamber mirror a10, and the first chamber mirror a8 makes to move from acousto-optic modulation
Frequently+1 grade of shift frequency diffraction light of device A5 overlaps with the reflection light light path from the 3rd chamber mirror a10, and described electrooptic modulator A15 joins
Put in the first chamber mirror a8, the second chamber mirror a9, the 3rd chamber mirror a10 between any two chamber mirrors in light path；At three mirror annular chamber A7
Exterior arrangement dispersion compensation device A17, described dispersion compensation device A17 is arranged on the transmitted light path of the second chamber mirror a9；Institute
State and on the reflected light path of spectroscope 3, configure reflecting mirror 4, acousto-optic modulation frequency shifter B6 successively, at described acousto-optic modulation frequency shifter B6
+ 1 grade of shift frequency optical diffraction on configure three mirror annular chamber B11, described three mirror annular chamber B11 are by the first chamber mirror b12, the second chamber
Mirror b13, the 3rd chamber mirror b14 and electrooptic modulator B16 composition ,+1 grade of shift frequency diffraction light of acousto-optic modulation frequency shifter B6 is successively
By the first chamber mirror b12, the second chamber mirror b13, the 3rd chamber mirror b14 is arranged on the reflected light path of the second chamber mirror b13, the first chamber
Mirror b12 is arranged on the reflected light path of the 3rd chamber mirror b14, and the first chamber mirror b12 makes+1 grade from acousto-optic modulation frequency shifter B6
Shift frequency diffraction light overlaps with the reflection light light path from the 3rd chamber mirror b14, and described electrooptic modulator B16 is arranged in the first chamber mirror
In b12, the second chamber mirror b13, the 3rd chamber mirror b14 between any two chamber mirrors in light path；Dispersion is configured outside three mirror annular chamber B11
Compensating device B18, described dispersion compensation device B18 is arranged on the transmitted light path of the second chamber mirror b13；Reference frequency oscillator
19 are connected respectively with double-channel signal generator A20, double-channel signal generator B21, described double-channel signal generator A20
Being connected respectively with acousto-optic modulation frequency shifter A5, acousto-optic modulation frequency shifter B6, described double-channel signal generator B21 adjusts with electric light
Device A13 processed, electrooptic modulator B14 connect respectively.
The first chamber mirror a8 of three described mirror annular chamber A7, the second chamber mirror a9, the 3rd chamber mirror a10 and three mirror annular chamber B11's
First chamber mirror b12, the second chamber mirror b13, the 3rd chamber mirror b14 include plane mirror, concave mirror and convex mirror chamber mirror type.
Described dispersion compensation device A17 and dispersion compensation device B18 include grating to, prism to and dispersion compensating fiber.
Described electrooptic modulator A15 and electrooptic modulator B16 includes electro-optic intensity modulator and electro-optic phase modulator.
Described reference frequency oscillator 19 includes atomic clock, crystal oscillator, ceramic resonator, electronic oscillator.
A kind of shift frequency in parallel and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generation methods, and the method step is as follows:
The emergent light frequency of (1) frequency stabilized carbon dioxide laser is v0, the described emergent light device that is split after optical isolator is divided into two
Shu Jiguang, described two bundle laser are respectively by two acousto-optic modulation frequency shifters, the modulating frequency of said two acousto-optic modulation frequency shifter
Value is respectively f1And f2, two+1 grade of shift frequency diffraction light frequency values of bundle of said two acousto-optic modulation frequency shifter output are respectively v0+f1
And v0+f2, described two+1 grade of shift frequency diffraction light of bundle input two three mirror annular chambers respectively, each contain in two three mirror annular chambers
The modulating frequency of an electrooptic modulator be respectively f3And f4, said two three mirror annular chamber exports a branch of optical frequency com respectively,
Two-beam frequency comb each inputs a dispersion compensation device, a branch of optical frequency com that two dispersion compensation device each export
Constitute the double optical frequency com of heterodyne；
(2) in the double optical frequency com of above-mentioned heterodyne, the center comb frequency of two-beam frequency comb is respectively v0+f1And v0+f2, institute
The center comb frequency-splitting stating two-beam frequency comb is | f1-f2|, the center comb frequency offset frequency of described two-beam frequency comb
Locking；
(3) in the double optical frequency com of above-mentioned heterodyne, the repetition rate of two-beam frequency comb is respectively f3And f4, described two-beam
The repetition rate difference of frequency comb is | f3-f4|, the repetition rate alien frequencies locking of described two-beam frequency comb；
(4) in the double optical frequency com of above-mentioned heterodyne, the frequency of two-beam frequency comb the i-th rank comb is expressed as v0+f1+i×f3
And v0+f2+i×f4, the heterodyne interference signal frequency of described two-beam frequency comb the i-th rank comb is | f1-f2|+i×|f3-f4|,
The center comb frequency-splitting of described two-beam frequency comb | f1-f2| with repetition rate difference | f3-f4| meet | f1-f2|>|i|×|f3
-f4|, the heterodyne interference signal frequency of described two-beam frequency comb the i-th rank comb is arithmetic progression；
(5) modulated signal of the primary acousto-optic modulation frequency shifter of parallel configuration and secondary acousto-optic modulation frequency shifter is by same the dual pathways
Signal generator provides, and the modulated signal of above-mentioned two electrooptic modulator is provided by another double-channel signal generator, and two double
The reference frequency signal of channel signal generator is provided by same reference frequency oscillator.
Other levels time shift frequency diffraction light of described primary acousto-optic modulation frequency shifter and secondary acousto-optic modulation frequency shifter equally realizes
State step.
Claims (7)
1. a shift frequency in parallel and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generation methods, it is characterised in that: described method step
As follows:
The emergent light frequency of (1) frequency stabilized carbon dioxide laser is v0, the described emergent light device that is split after optical isolator is divided into two
Shu Jiguang, described two bundle laser are respectively by two acousto-optic modulation frequency shifters, the modulating frequency of said two acousto-optic modulation frequency shifter
Value is respectively f1And f2, two+1 grade of shift frequency diffraction light frequency values of bundle of said two acousto-optic modulation frequency shifter output are respectively v0+f1
And v0+f2, described two+1 grade of shift frequency diffraction light of bundle input two three mirror annular chambers respectively, each contain in two three mirror annular chambers
The modulating frequency of an electrooptic modulator be respectively f3And f4, said two three mirror annular chamber exports a branch of optical frequency com respectively,
Two-beam frequency comb each inputs a dispersion compensation device, a branch of optical frequency com that two dispersion compensation device each export
Constitute the double optical frequency com of heterodyne；
(2) in the double optical frequency com of above-mentioned heterodyne, the center comb frequency of two-beam frequency comb is respectively v0+f1And v0+f2, institute
The center comb frequency-splitting stating two-beam frequency comb is | f1-f2|, the center comb frequency offset frequency of described two-beam frequency comb
Locking；
(3) in the double optical frequency com of above-mentioned heterodyne, the repetition rate of two-beam frequency comb is respectively f3And f4, described two-beam
The repetition rate difference of frequency comb is | f3-f4|, the repetition rate alien frequencies locking of described two-beam frequency comb；
(4) in the double optical frequency com of above-mentioned heterodyne, the frequency of two-beam frequency comb the i-th rank comb is expressed as v0+f1+i×f3
And v0+f2+i×f4, the heterodyne interference signal frequency of described two-beam frequency comb the i-th rank comb is | f1-f2|+i×|f3-f4|,
The center comb frequency-splitting of described two-beam frequency comb | f1-f2| with repetition rate difference | f3-f4| meet | f1-f2|>|i|×|f3
-f4|, the heterodyne interference signal frequency of described two-beam frequency comb the i-th rank comb is arithmetic progression；
(5) modulated signal of the primary acousto-optic modulation frequency shifter of parallel configuration and secondary acousto-optic modulation frequency shifter is by same the dual pathways
Signal generator provides, and the modulated signal of above-mentioned two electrooptic modulator is provided by another double-channel signal generator, and two double
The reference frequency signal of channel signal generator is provided by same reference frequency oscillator.
Shift frequency in parallel the most according to claim 1 and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generation methods, and its feature exists
In: other levels time shift frequency diffraction light of described primary acousto-optic modulation frequency shifter and secondary acousto-optic modulation frequency shifter equally realizes
State step.
3. shift frequency in parallel and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generating means, in the outgoing of frequency stabilized carbon dioxide laser (1)
Optical isolator (2) and spectroscope (3) is configured successively in light path；It is characterized in that: at the transmission light of described spectroscope (3)
Configure acousto-optic modulation frequency shifter A (5) on road ,+1 grade of shift frequency optical diffraction of described acousto-optic modulation frequency shifter A (5) is joined
Putting three mirrors annular chamber A (7), described three mirrors annular chamber A (7) are by the first chamber mirror a (8), the second chamber mirror a (9), the 3rd chamber
Mirror a (10) and electrooptic modulator A (15) composition ,+1 grade of shift frequency diffraction light of acousto-optic modulation frequency shifter A (5) passes sequentially through
First chamber mirror a (8), the second chamber mirror a (9), the 3rd chamber mirror a (10) is arranged on the reflected light path in the second chamber mirror a (9),
First chamber mirror a (8) is arranged on the reflected light path in the 3rd chamber mirror a (10), and the first chamber mirror a (8) makes to move from acousto-optic modulation
Frequently+1 grade of shift frequency diffraction light of device A (5) overlaps with the reflection light light path from the 3rd chamber mirror a (10), described electrooptic modulator
A (15) is arranged in the first chamber mirror a (8), the second chamber mirror a (9), the 3rd chamber mirror a (10) light path between any two chamber mirrors
On；At three mirrors annular chamber A (7) exterior arrangement dispersion compensation device A (17), described dispersion compensation device A (17) configures
On the transmitted light path in the second chamber mirror a (9)；The reflected light path of described spectroscope (3) configures successively reflecting mirror (4),
Acousto-optic modulation frequency shifter B (6), configures three mirror annulars on+1 grade of shift frequency optical diffraction of described acousto-optic modulation frequency shifter B (6)
Chamber B (11), described three mirrors annular chamber B (11) are by the first chamber mirror b (12), the second chamber mirror b (13), the 3rd chamber mirror b (14)
Forming with electrooptic modulator B (16) ,+1 grade of shift frequency diffraction light of acousto-optic modulation frequency shifter B (6) passes sequentially through the first chamber mirror b
(12), the second chamber mirror b (13), the 3rd chamber mirror b (14) is arranged on the reflected light path in the second chamber mirror b (13), the first chamber
Mirror b (12) is arranged on the reflected light path in the 3rd chamber mirror b (14), and the first chamber mirror b (12) makes from acousto-optic modulation frequency shifter
+ 1 grade of shift frequency diffraction light of B (6) overlaps with the reflection light light path from the 3rd chamber mirror b (14), described electrooptic modulator B (16)
It is arranged in the first chamber mirror b (12), the second chamber mirror b (13), the 3rd chamber mirror b (14) between any two chamber mirrors in light path；?
Three mirrors annular chamber B (11) configure outward dispersion compensation device B (18), and described dispersion compensation device B (18) is arranged in the second chamber
On the transmitted light path of mirror b (13)；Reference frequency oscillator (19) and double-channel signal generator A (20), double-channel signal
Generator B (21) connects respectively, described double-channel signal generator A (20) and acousto-optic modulation frequency shifter A (5), acousto-optic
Modulation frequency shifter B (6) connects respectively, described double-channel signal generator B (21) and electrooptic modulator A (13), electric light
Manipulator B (14) connects respectively.
Shift frequency in parallel the most according to claim 3 and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generating means, and its feature exists
In: the first chamber mirror a (8) of three described mirrors annular chamber A (7), the second chamber mirror a (9), the 3rd chamber mirror a (10) and three mirrors
First chamber mirror b (12) of annular chamber B (11), the second chamber mirror b (13), the 3rd chamber mirror b (14) include plane mirror, concave surface
Mirror and convex mirror chamber mirror type.
Shift frequency in parallel the most according to claim 3 and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generating means, and its feature exists
In: described dispersion compensation device A (17) and dispersion compensation device B (18) include grating to, prism to and dispersion compensation
Optical fiber.
Shift frequency in parallel the most according to claim 3 and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generating means, and its feature exists
In: described electrooptic modulator A (15) and electrooptic modulator B (16) includes electro-optic intensity modulator and electric light phase-modulation
Device.
Shift frequency in parallel the most according to claim 3 and Laser with External Dispersive compensate three mirror annular chamber double frequency comb generating means, and its feature exists
In: described reference frequency oscillator (19) includes atomic clock, crystal oscillator, ceramic resonator, electronic oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307909.0A CN105932527A (en) | 2016-05-11 | 2016-05-11 | Double-frequency comb generation method and apparatus based on parallel frequency shifters and 3-mirror ring cavities having outer-cavity dispersion compensators |
Applications Claiming Priority (1)
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