CN204858271U - Laser system suitable for can carry atom interferometer - Google Patents
Laser system suitable for can carry atom interferometer Download PDFInfo
- Publication number
- CN204858271U CN204858271U CN201520608775.7U CN201520608775U CN204858271U CN 204858271 U CN204858271 U CN 204858271U CN 201520608775 U CN201520608775 U CN 201520608775U CN 204858271 U CN204858271 U CN 204858271U
- Authority
- CN
- China
- Prior art keywords
- frequency
- laser
- light
- semiconductor laser
- stabilization module
- 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
Landscapes
- Semiconductor Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The utility model provides a laser system suitable for can carry atom interferometer, including a semiconductor laser (1), the 2nd semiconductor laser (5), time pump light frequency stabilization module (9), cooling light frequency stabilization module (8), first light beam splitting arrangement (2), second light beam splitting arrangement (4), third light beam splitting arrangement (7), first toper amplifier (3) and second toper amplifier (6), cooling light frequency stabilization module (8) including photoelectric detector (10), microwave reference source (11), first detector (12), RF switch (13), frequency voltage converting apparatus (14), subtracter (15), the 1st proportional integral circuit (16), laser instrument electric current source (17). The utility model discloses a laser system compact structure, the loss of good, the luminous power of stability is little, the laser frequency is nimble adjusts.
Description
Technical field
The utility model relates to laser frequency control technology field, is specifically related to obtain a kind of laser system of required laser frequency in cold atom interferometer.
Background technology
Two ten years in the past, cold atom interferometer develops into the very competitive survey tool of field of precision measurement one because of its higher potential sensitivity.Cold atom interferometer depends on laser to cool and manipulates atom.Light path system or the number of lasers of atomic interferometer are many, and system is unstable, power consumption is large, or the laser frequency shifter used in light path system is many, and light path system is bulky, optical power loss is serious, system environments poor anti jamming capability.Laser many employings external-cavity semiconductor laser (ECDL) in conventional light path system, anti-vibration interference performance is poor, and number of lasers is generally more than three, so just causes the bad stability of light path system.
Summary of the invention
Goal of the invention of the present utility model is to provide a kind of laser system being applicable to carry atomic interferometer, and this laser system compact conformation, good stability, optical power loss are little, laser frequency flexible.
Concrete technical scheme of the present utility model is a kind of laser system being applicable to carry atomic interferometer, comprise the first semiconductor laser, the second semiconductor laser, return pump light frequency stabilization module, cool light frequency stabilization module, the first smooth beam splitting arrangement, the second smooth beam splitting arrangement, the 3rd smooth beam splitting arrangement, the first tapered amplifier and the second tapered amplifier
The output light of the first described semiconductor laser is divided into two bundles through the first smooth beam splitting arrangement, wherein pump light frequency stabilization module is returned in a branch of input, the output returning pump light frequency stabilization module is connected with the current-modulation port of the first semiconductor laser, two bundles are divided into through the second smooth beam splitting arrangement after another bundle carries out power amplification by the first tapered amplifier, wherein a branch of input cooling light frequency stabilization module, first of another Shu Zuowei laser system exports light
The output light of the second described semiconductor laser is divided into two bundles through the 3rd smooth beam splitting arrangement after carrying out power amplification by the second tapered amplifier, wherein a branch of input cooling light frequency stabilization module, and second of another Shu Zuowei laser system exports light,
Described cooling light frequency stabilization module comprises photodetector, microwave reference source, frequency mixer, radio-frequency (RF) switch, voltage to frequency conversion equipment, subtracter, first proportional integral circuit, laser diode current modulating device, the two-beam beat frequency of input cooling light frequency stabilization module, first by described photoelectric detector, the output signal of telecommunication of photodetector and the output microwave signal of microwave reference source export the input of radio-frequency (RF) switch to after frequency mixer mixing, described radio-frequency (RF) switch output is linked in sequence voltage to frequency conversion equipment, subtracter, first proportional integral circuit and laser diode current source, the output in laser diode current source is connected with the current-modulation port of the second semiconductor laser.
Further, described cooling light frequency stabilization module also comprises phase frequency detector, the second proportional integral circuit and derived reference signal, another output of described radio-frequency (RF) switch is linked in sequence phase frequency detector, the second proportional integral circuit and laser diode current source, and described derived reference signal is connected with the input of phase frequency detector.
Further, the reference voltage of subtracter 15 input is regulated can to realize exporting second of laser system the fine setting of light frequency.
Further, the first described semiconductor laser and the second semiconductor laser are distributed feedback semiconductor laser.
The beneficial effects of the utility model are that the laser system being applicable to carry atomic interferometer of the present utility model utilizes two distributed feedback lasers (DFB) to realize as seed light
87the cooling imprison of Rb atom and the light required for all processes such as intervening atom and detection, Distributed Feedback Laser is ECDL good stability comparatively, and whole light path system frequency shifter is less, and compact conformation, power consumption are little, may be used for carrying type atomic interferometer.And utilize rubidium atom two hyperfine structure transition lines to be frequency reference, laser shift frequency is on a large scale realized by the mode directly changing laser output frequency, realize compared with the method for shift frequency with traditional acousto-optic frequency shifters that utilizes, simplify light path and avoid the optical power loss that shift frequency brings.
Accompanying drawing explanation
Fig. 1 composition schematic diagram being applicable to the laser system can carrying atomic interferometer of the present utility model;
Fig. 2
87rb atom D2 line spectrum line schematic diagram;
Fig. 3 composition schematic diagram being applicable to the cooling light frequency stabilization module of the laser system can carrying atomic interferometer of the present utility model;
Fig. 4 is rubidium atom saturated absorption spectra and the laser frequency variation diagram being applicable to the laser system can carrying atomic interferometer of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is further described.
As shown in Figure 1, of the present utility modelly a kind ofly be applicable to the laser system can carrying atomic interferometer, comprise the first semiconductor laser 1, second semiconductor laser 5, return pump light frequency stabilization module 9, the smooth beam splitting arrangement 4 of cooling light frequency stabilization module the 8, first smooth beam splitting arrangement 2, second, the 3rd smooth beam splitting arrangement 7, first tapered amplifier 3, second tapered amplifier 6.
The output light of the first described semiconductor laser 1 is divided into two bundles through the first smooth beam splitting arrangement 2, wherein pump light frequency stabilization module 9 is returned in a branch of input, the output returning pump light frequency stabilization module 9 is connected with the current-modulation port of the first semiconductor laser 1, two bundles are divided into through the second smooth beam splitting arrangement 4 after another bundle carries out power amplification by the first tapered amplifier 3, wherein a branch of input cooling light frequency stabilization module 8, for the output light of the second semiconductor laser 5 provides frequency reference, first of another Shu Zuowei laser system exports light, and what can provide interferometer returns pump light or main Raman light.
87the D2 spectrum of Rb atom as shown in Figure 2,
87in the Rb atom cooling imprison stage, return pump light frequency correspondence
87rb atom D
2the transition of line F=1 to F '=2, prevents atom to be pumped into dark-state; ?
87in the Rb intervening atom stage, interferometer needs a pair Raman light of the far away red off resonance of frequency phase-difference 6.834GHz, produces stimulated Raman transition to make rubidium atom.Now, laser output frequency is corresponding
85rb atom D
2the transition of line F=2 to F '=3, for atomic interferometer provides main Raman light, the light that namely Raman light medium frequency is larger.Return pump light frequency stabilization module 9 with rubidium atomic hyperfine transition line D
2line is frequency reference, the error signal of input light frequency is fed back to the current-modulation port of the first semiconductor laser 1, stablizes the first semiconductor laser 1 frequency.
The output light of the second described semiconductor laser 5 is divided into two bundles through the 3rd smooth beam splitting arrangement 7 after carrying out power amplification by the second tapered amplifier 6, wherein a branch of beat frequency that overlaps with the second smooth beam splitting arrangement 4 light beam out, realizes the frequency stabilization or phase-locked of cooling light through supercooling light frequency stabilization module 8.Second of another Shu Zuowei laser system exports light, can provide the cooling light of interferometer, detection light and from Raman light.As shown in Figure 2, exist
87the Rb atom cooling imprison stage, cooling light frequency red off resonance in
87rb atom D
2the transition of line F=2 to F '=3, cooling
87rb atom; ?
87in the Rb intervening atom stage, the second semiconductor laser 5 frequency following first semiconductor laser 1 Frequency Synchronization ground reduces, for atomic interferometer provides from Raman light, and the light that namely Raman light medium frequency is less.
The first described semiconductor laser 1 and the second semiconductor laser 5 are distributed feedback semiconductor laser (DFB), this laser structure is compact, mode hopping scope is not generally greater than 100GHz, anti-vibration interference performance is strong, changes output frequency by regulating laser tube Injection Current or temperature.
The course of work of atomic interferometer is according to being divided into cooling, interfering and detection three Main Stage to the demand of the laser frequency of laser system, cooling stage is identical to seed light (the first semiconductor laser 1 and the light that the second semiconductor laser 5 exports) frequency needs with the detection phase.At cooling stage, return pump light and by frequency stabilization module 9, frequency locker is existed
87rbD
2on the hyperfine structure transition line of F=1 to F '=2 of line, by cooling light frequency stabilization module 8 by its frequency reference to returning in pump light frequency, and there is the frequency difference of 6.8GHz between the two in cooling light.Described cooling light frequency stabilization module 8 comprises photodetector 10, microwave reference source 11, frequency mixer 12, radio-frequency (RF) switch 13, voltage to frequency conversion equipment 14, subtracter 15, first proportional integral circuit 16, laser diode current source 17, first the two bundle space coincidence degree extraordinary input light of input cooling light frequency stabilization module 8 enter described photodetector 10, photodetector 10 is fast light fulgurite, two laser beat frequency signals are converted to the signal of telecommunication by it, export the difference frequency signal of two laser, the microwave signal of the frequency difference signal exported and the output of microwave reference source 11 is through frequency mixer 12 mixing, beat signal frequency is reduced to radio band, microwave reference source 11 frequency stability is better, phase noise is lower, for beat signal provides frequency reference.The mixed frequency signal frequency that frequency mixer 12 exports is the difference on the frequency between microwave reference source 11 and beat signal, mixed frequency signal is to the input of radio-frequency (RF) switch 13, switch 13 has an input port, two output ports, exported by Transistor-Transistor Logic level triggering selection port, described radio-frequency (RF) switch 13 is that an output is linked in sequence voltage to frequency conversion equipment 14 (being corresponding voltage by mixed frequency signal frequency inverted), subtracter 15 (output voltage and reference voltage poor through subtracter 15, obtain error voltage signal), first proportional integral circuit 16 (error voltage signal feeds back to laser diode current source 17 after the first proportional integral circuit 16 carries out proportional, integral process), laser diode current source 17, the output in laser diode current source 17 is connected with the current-modulation port of the second semiconductor laser 5.Regulate the reference voltage of subtracter 15 input can realize exporting second of laser system the fine setting of light frequency.Above branch road is with signal source 11 and return pump light laser (the first semiconductor laser 1) frequency for benchmark, the error signal of two bundle input laser frequency differences of input cooling light frequency stabilization module 8 is fed back to the current-modulation port of the second semiconductor laser 5, stablize the second semiconductor laser 5 output frequency, this branch road is used for the cooling stage of interferometer.
Described cooling light frequency stabilization module 8 also comprises phase frequency detector 18, second proportional integral circuit 19 and derived reference signal 20, described another output port of radio-frequency (RF) switch 13 is linked in sequence phase frequency detector 18, second proportional integral circuit 19 and laser diode current source 17, (derived reference signal 20 is the DDS signal source of low phase noise to described derived reference signal 20, frequency and phase reference as the mixed frequency signal of frequency mixer 12 output) be connected with the input of phase frequency detector 18, (phase frequency detector 18 is made up of high-speed comparator and digital frequency phase detector and low pass filter, there is the function differentiating frequency and phase place), mixed frequency signal and DDS reference source signal are through the frequency of phase frequency detector 18 or phase error signal, error signal processes through the second proportional integral circuit 19, feed back to laser diode current source 17, laser diode current source 17 output is connected with the current-modulation port of the second semiconductor laser 5, regulate the Injection Current size of laser tube, and then regulate output frequency and the phase place of the second semiconductor laser 5, obtain low phase noise Raman light.Above branch road is used for the interference stage of interferometer, and now branch road is operated in phase demodulation pattern, for interferometer provides from Raman light.
In the different stages, atomic interferometer is different to laser frequency demand, when changing between different phase, needs to change laser frequency.Such as, be transitioned into the process in interference stage from cooling stage, cooling light and time pump light frequency all need to reduce about 2GHz, provide the Raman light required for intervening atom, and this frequency conversion process is realized by change two laser works electric currents.The current source of laser is a voltage-controlled current source, changes the output current that the voltage being applied to current source can change current source, and then changes laser output frequency.The control voltage in laser diode current source can be provided by self-control reference voltage circuit, and the voltage that also can directly be exported by Labview program control capture card provides.After cooling stage completes, computer program has controlled the change of the switching of reference voltage circuit voltage or the voltage of capture card output, realize the saltus step of laser frequency, the laser frequency of different phase as shown in Figure 4, with rubidium atomic hyperfine Absorption Line for frequency reference, by changing laser Injection Current, the first semiconductor laser 1 frequency from
87rbD
2jump near F=1 to the F '=2 transition line of line
85rbD
2near F=2 to F '=3 frequency of line, under closed-loop case, by returning pump light frequency stabilization module 9, its frequency stabilization is existed
85rbD
2on F=2 to F '=3 of line, complete the saltus step that laser frequency is about 2.5GHz.While the first semiconductor laser 1 frequency generation saltus step, profit uses the same method, by changing the second semiconductor laser 5 operating current, cooling light frequency is followed back pump light frequency and 2.5GHz saltus step is occurred, under closed-loop case, by the feedback effect of cooling light frequency stabilization module 8, by the second semiconductor laser 5 frequency stabilization on the first semiconductor laser 1 output frequency, whole frequency hopping process completed before the first bundle Raman pulse and atomic interaction.After the interference stage completes, before final states detection, profit uses the same method and laser frequency rebound to be gone, for interferometer provides detection light.
Claims (4)
1. one kind is applicable to the laser system can carrying atomic interferometer, comprise the first semiconductor laser (1), the second semiconductor laser (5), return pump light frequency stabilization module (9), cool light frequency stabilization module (8), the first smooth beam splitting arrangement (2), the second smooth beam splitting arrangement (4), the 3rd smooth beam splitting arrangement (7), the first tapered amplifier (3) and the second tapered amplifier (6)
The output light of described the first semiconductor laser (1) is divided into two bundles through the first smooth beam splitting arrangement (2), wherein pump light frequency stabilization module (9) is returned in a branch of input, the output returning pump light frequency stabilization module (9) is connected with the current-modulation port of the first semiconductor laser (1), two bundles are divided into through the second smooth beam splitting arrangement (4) after another bundle carries out power amplification by the first tapered amplifier (3), wherein a branch of input cooling light frequency stabilization module (8), first of another Shu Zuowei laser system exports light
The output light of described the second semiconductor laser (5) is divided into two bundles through the 3rd smooth beam splitting arrangement (7) after carrying out power amplification by the second tapered amplifier (6), wherein a branch of input cooling light frequency stabilization module (8), second of another Shu Zuowei laser system exports light
Described cooling light frequency stabilization module (8) comprises photodetector (10), microwave reference source (11), frequency mixer (12), radio-frequency (RF) switch (13), voltage to frequency conversion equipment (14), subtracter (15), first proportional integral circuit (16), laser diode current modulating device (17), the two-beam beat frequency of input cooling light frequency stabilization module (8), first received by described photodetector (10), the output signal of telecommunication of photodetector (10) and the output microwave signal of microwave reference source (11) export the input of radio-frequency (RF) switch (13) to after frequency mixer (12) mixing, described radio-frequency (RF) switch (13) outputs are linked in sequence voltage to frequency conversion equipment (14), subtracter (15), first proportional integral circuit (16) and laser diode current source (17), the output in laser diode current source (17) is connected with the current-modulation port of the second semiconductor laser (5).
2. be a kind ofly as claimed in claim 1 applicable to the laser system can carrying atomic interferometer, it is characterized in that, described cooling light frequency stabilization module (8) also comprises phase frequency detector (18), the second proportional integral circuit (19) and derived reference signal (20), described radio-frequency (RF) switch (13) another output is linked in sequence phase frequency detector (18), the second proportional integral circuit (19) and laser diode current source (17), and described derived reference signal (20) is connected with the input of phase frequency detector (18).
3. be a kind ofly as claimed in claim 1 applicable to the laser system can carrying atomic interferometer, it is characterized in that, regulate the reference voltage of subtracter 15 input can realize exporting second of laser system the fine setting of light frequency.
4. a kind of as described in as arbitrary in claim 1-3 one is applicable to the laser system can carrying atomic interferometer, it is characterized in that, described the first semiconductor laser (1) and the second semiconductor laser (5) are distributed feedback semiconductor laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520608775.7U CN204858271U (en) | 2015-08-13 | 2015-08-13 | Laser system suitable for can carry atom interferometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520608775.7U CN204858271U (en) | 2015-08-13 | 2015-08-13 | Laser system suitable for can carry atom interferometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204858271U true CN204858271U (en) | 2015-12-09 |
Family
ID=54748790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520608775.7U Active CN204858271U (en) | 2015-08-13 | 2015-08-13 | Laser system suitable for can carry atom interferometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204858271U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647926A (en) * | 2016-11-18 | 2017-05-10 | 浙江工业大学 | DDS (Direct Digital Frequency Synthesizer) frequency hopping device used for laser time sequence control of cold atom interferometer |
| CN107957298A (en) * | 2017-12-15 | 2018-04-24 | 华中科技大学 | A kind of laser frequency saltus step measuring device |
| CN108225578A (en) * | 2017-12-25 | 2018-06-29 | 中国科学技术大学 | A kind of twin-laser system suitable for cold atom interference accurate measurement |
| CN112864781A (en) * | 2021-01-08 | 2021-05-28 | 中国船舶重工集团公司第七0七研究所 | Communication waveband laser system and method for cold atom interferometer |
| CN114389129A (en) * | 2021-12-07 | 2022-04-22 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Laser system for modular cold atoms |
-
2015
- 2015-08-13 CN CN201520608775.7U patent/CN204858271U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647926A (en) * | 2016-11-18 | 2017-05-10 | 浙江工业大学 | DDS (Direct Digital Frequency Synthesizer) frequency hopping device used for laser time sequence control of cold atom interferometer |
| CN106647926B (en) * | 2016-11-18 | 2023-08-08 | 浙江工业大学 | DDS frequency hopping device for laser time sequence control of cold atom interferometer |
| CN107957298A (en) * | 2017-12-15 | 2018-04-24 | 华中科技大学 | A kind of laser frequency saltus step measuring device |
| CN108225578A (en) * | 2017-12-25 | 2018-06-29 | 中国科学技术大学 | A kind of twin-laser system suitable for cold atom interference accurate measurement |
| CN112864781A (en) * | 2021-01-08 | 2021-05-28 | 中国船舶重工集团公司第七0七研究所 | Communication waveband laser system and method for cold atom interferometer |
| CN114389129A (en) * | 2021-12-07 | 2022-04-22 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Laser system for modular cold atoms |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204858271U (en) | Laser system suitable for can carry atom interferometer | |
| CN108225578B (en) | Dual-laser system suitable for cold atom interference precision measurement | |
| CN108768539B (en) | Photon type microwave frequency-halving method and photon type microwave frequency-halving device | |
| CN104767102B (en) | Optical-electronic oscillator | |
| CN103560769B (en) | A kind of AWG and random waveform production method | |
| CN103684450A (en) | Method for outputting standard frequency of coherent population beat-frequency atomic clock | |
| CN104821486A (en) | High-precision frequency linear-tuning narrow-linewidth laser device | |
| CN109286124B (en) | Laser linewidth compression method and system | |
| CN109842450B (en) | Photon type switchable microwave frequency division method and device | |
| CN103227415A (en) | Rapid frequency shift device and frequency shift method for semiconductor laser | |
| CN105629520A (en) | Method for generating flat and tunable optical frequency comb (OFC) with wide bandwidth | |
| CN103441410B (en) | Optical loop device and photoelectric oscillator based on optical loop energy storage and filtering | |
| CN105827240A (en) | Low-phase-noise 6.8GHz frequency source applied to rubidium atomic clock | |
| CN102946249A (en) | Frequency synthesizer | |
| CN109525244B (en) | Coupling type photoelectric oscillation signal generator with high-speed and adjustable frequency | |
| EP1327298B1 (en) | Frequency synthesiser | |
| CN113394646A (en) | Tuned optoelectronic oscillator and feedback control method thereof | |
| CN104333378A (en) | Fast phase locking low-noise signal generator and signal generation method | |
| CN103501174A (en) | Low-noise reference signal generator and signal generation method | |
| Sun et al. | Inter-modal laser based RF output stabilization using forced SILPLL technique | |
| CN116316053A (en) | Novel frequency mixing multiband DFB laser driving system | |
| CN109697336B (en) | Amplitude balance parameter simulation method generated by dual-modulator multi-wavelength laser | |
| CN104051956A (en) | Multi-laser frequency locking device | |
| RU206224U1 (en) | FREQUENCY GRID SYNTHESIZER | |
| Rodwell et al. | Optical phase-locking and wavelength synthesis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xuan Yang Inventor after: Yao Huibin Inventor after: Zhong Shan Inventor after: Mao Haicen Inventor after: Liu Kangqi Inventor after: Zhou Fangyuan Inventor before: Xuan Yang Inventor before: Yao Huibing Inventor before: Zhong Shan Inventor before: Mao Haicen Inventor before: Liu Kangqi Inventor before: Zhou Fangyuan |
|
| COR | Change of bibliographic data |