CN219978711U - Diffuse reflection cold atomic clock optical system - Google Patents
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- CN219978711U CN219978711U CN202321395240.7U CN202321395240U CN219978711U CN 219978711 U CN219978711 U CN 219978711U CN 202321395240 U CN202321395240 U CN 202321395240U CN 219978711 U CN219978711 U CN 219978711U
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Abstract
The utility model provides a diffuse reflection cold atomic clock optical system which comprises a laser generating module, a beam splitting module, a first modulation module, a second modulation module and an electro-optic modulation module. The laser generation module outputs a main beam, the beam splitting module divides the main beam into a transmission beam and a reflection beam, the first modulation module modulates the transmission beam and selects a required diffraction order beam, and the transmission beam is output as detection light after the first modulation module acts; the second modulation module modulates the reflected light beam and selects a light beam with a required diffraction order; the electro-optical modulation module comprises an electro-optical modulator, and the electro-optical modulator is used for modulating the light beam output by the second modulation module and outputting cooling light, heavy pump light and pumping light. The utility model reduces the number of optical devices used by the optical system, simultaneously cancels the beam combining optical path, effectively reduces the power consumption and the complexity of the optical system, improves the integration level, the reliability and the stability of the optical system, and is convenient for realizing industrialization.
Description
Technical Field
The utility model relates to the technical field of cold atomic clocks, in particular to a diffuse reflection cold atomic clock optical system.
Background
The atomic clock has wide application in navigation, communication, national defense and other fields, and the fields also need to ensure the performance and reliability of the atomic clock and simultaneously have small volume and power consumption. Compared with the traditional heat atomic clock, the diffuse reflection cold atomic clock cools the atomic temperature to be close to absolute zero, effectively inhibits Doppler broadening and decoherence phenomena caused by atomic heat movement, and is also supposed to have better performance than the traditional heat atomic clock; compared with common cold atomic clocks such as fountain clocks, the cooling system and the physical system of the diffuse reflection cold atomic clock are simple, and the cooling system and the physical system are also supposed to be more convenient for integration and miniaturization. These advantages have also led to increased attention to diffusely reflecting cold atomic clocks.
The performance of the diffuse reflection cold atomic clock is greatly affected by the performance of the optical system, and a reliable and stable optical system is indispensable. The optical system of the diffuse reflection cold atomic clock is mainly used for providing cooling light, heavy pump light, pumping light and detection light required by the normal operation of the atomic clock. The cooling light and the heavy pump light are overlapped in time sequence, so that atoms can be prepared to a specific state while cold atoms are prepared, then atoms are prepared to an atomic state required by clock frequency transition by using pumping light, ramsey interaction is performed, and finally the population of the atoms after Ramsey action is characterized by the absorption of the atoms to detection light. The frequency deviation of the cooling light, the pumping light and the detector is small in the four light beams, and the frequency deviation of the heavy pumping light and the cooling light is about 9GHz in the hundred MHz order. In practical use, two lasers and four-way AOM double pass optical paths are often required to generate the four beams of light, meanwhile, in order to transmit the four beams of light into a physical system, cooling light, heavy pump light and pumping light are required to be combined into an optical fiber, and a mechanical optical switch is added, so that periodic vibration can be brought about by introducing the mechanical optical switch, a certain challenge is brought to the stability of an optical platform, and too many devices can lead to very complex optical paths and poor reliability, and a great challenge is brought to industrialization of the optical platform.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a diffuse reflection cold atomic clock optical system which reduces the complexity of the optical system, improves the integration level, the reliability and the stability of the optical system and is convenient for realizing industrialization.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a diffuse reflection cold atomic clock optical system comprises a laser generating module, a beam splitting module, a first modulation module, a second modulation module and an electro-optic modulation module.
The laser generation module is used for outputting a main beam, the beam splitting module is arranged on an output light path of the main beam, the beam splitting module splits the main beam into a transmission beam and a reflection beam, the first modulation module is arranged on the output light path of the transmission beam, the first modulation module is used for modulating the transmission beam and selecting a required diffraction order beam, and the transmission beam is output as detection light after being acted by the first modulation module; the second modulation module is arranged on the output light path of the reflected light beam and is used for modulating the reflected light beam and selecting a light beam with a required diffraction order; the electro-optical modulation module is arranged on an output light path of the second modulation module and comprises an electro-optical modulator, and the electro-optical modulator is used for modulating the light beam output by the second modulation module and outputting cooling light, heavy pump light and pumping light.
Preferably, the laser generating module comprises a laser, an isolator, a laser beam splitter and a laser frequency stabilizer, the isolator is arranged on an output light path of the laser, the laser beam splitter is arranged on an output light path of the isolator, a beam output by the isolator is split into reflected laser and transmitted laser after passing through the laser beam splitter, the laser frequency stabilizer is arranged on an output light path of the reflected laser, the laser frequency stabilizer is used for stabilizing the frequency of the laser according to the reflected laser, and the transmitted laser is output to the beam splitting module as a main beam.
Preferably, the laser beam splitter includes a first half-wave plate and a first polarization splitting prism, the first half-wave plate is disposed on an output light path of the isolator, the first polarization splitting prism is disposed on the output light path of the first half-wave plate, and the first half-wave plate is used in cooperation with the first polarization splitting prism to perform splitting ratio adjustable splitting on the reflected laser and the transmitted laser.
Preferably, the beam splitting module includes a second half-wave plate and a second polarization beam splitting prism, the second half-wave plate is disposed on an output optical path of the main beam, the second polarization beam splitting prism is disposed on an output optical path of the second half-wave plate, and the second half-wave plate is used in cooperation with the second polarization beam splitting prism to split the reflected beam and the transmitted beam with an adjustable beam splitting ratio.
Preferably, the beam splitting module further includes a reflecting element, and the reflecting element is disposed on an output optical path of the transmitted beam, so as to guide the transmitted beam to the first modulation module; or the reflecting element is arranged on the output light path of the reflected light beam so as to guide the reflected light beam to the second modulation module.
Preferably, the reflecting element is a 45 ° mirror.
Preferably, the first modulation module includes a first acousto-optic modulator and a first beam limiting element, the first acousto-optic modulator is disposed on an output optical path of the transmitted beam, and the first beam limiting element is disposed on the output optical path of the first acousto-optic modulator.
Preferably, the first beam limiting element is a diaphragm.
Preferably, the second modulation module includes a second optical modulator and a second beam limiting element, the second optical modulator is disposed on an output optical path of the reflected light beam, the second beam limiting element is disposed on an output optical path of the second optical modulator, and the electro-optical modulator is disposed on an output optical path of the second beam limiting element.
Preferably, the second beam limiting element is a diaphragm.
Compared with the prior art, the utility model has the beneficial effects that: the diffuse reflection cold atomic clock optical system reduces the number of optical devices used by the optical system, simultaneously cancels a beam combining optical path, effectively reduces the power consumption and the complexity of the optical system, improves the integration level, the reliability and the stability of the optical system, and is convenient for realizing industrialization.
Drawings
FIG. 1 is a block diagram of a diffuse reflection cold atomic clock optical system according to one embodiment of the present utility model.
Fig. 2 is a schematic diagram of an optical system of a diffuse reflection cold atomic clock according to an embodiment of the present utility model.
Fig. 3 is a schematic diagram of an optical system of a diffuse reflection cold atomic clock according to another embodiment of the present utility model.
FIG. 4 is a schematic diagram of the output frequencies of the light beams in a diffuse reflection cold atomic clock optical system application according to one embodiment of the present utility model.
In the figure, a 100-laser generating module, a 200-beam splitting module, a 300-first modulating module, a 400-second modulating module, a 500-electro-optical modulating module, a 1-laser, a 2-isolator, 301, 302-half wave plates, 401, 402-polarization beam splitting prisms, a 5-laser frequency stabilizer, a 6-reflecting element, 701, 702-acousto-optic modulator, 801, 802-beam limiting element, a 9-electro-optical modulator, 10-probe light, 11-cooling light, heavy pump light and pumping light.
Description of the embodiments
For a further understanding of the objects, construction, features and functions of the utility model, reference should be made to the following detailed description of the preferred embodiments.
Referring to fig. 1 and fig. 2 in combination, fig. 1 is a block diagram illustrating a diffuse reflection cold atomic clock optical system according to an embodiment of the present utility model, and fig. 2 is a schematic diagram illustrating a diffuse reflection cold atomic clock optical system according to an embodiment of the present utility model.
The utility model relates to a diffuse reflection cold atomic clock optical system, which comprises a laser generating module 100, a beam splitting module 200, a first modulation module 300, a second modulation module 400 and an electro-optic modulation module 500.
The laser generating module 100 is configured to output a main beam, the beam splitting module 200 is disposed on an output optical path of the main beam, the beam splitting module 200 splits the main beam into a transmitted beam and a reflected beam, the first modulating module 300 is disposed on the output optical path of the transmitted beam, the first modulating module 300 is configured to modulate the transmitted beam and select a desired diffraction order beam, and the transmitted beam is output as the probe light 10 after being acted by the first modulating module 300. The second modulation module 400 is disposed on the output optical path of the reflected light beam, and the second modulation module 400 is used for modulating the reflected light beam and selecting a light beam with a desired diffraction order. The electro-optical modulation module 500 is disposed on the output optical path of the second modulation module 400, where the electro-optical modulation module 500 includes an electro-optical modulator 9, and the electro-optical modulator 9 is configured to modulate the light beam output by the second modulation module 400 and output cooling light, heavy pump light, and pumping light 11.
The diffuse reflection cold atomic clock optical system adopts the electro-optical modulator to generate heavy pump light and pumping light, so that the number of optical devices used is reduced, meanwhile, a beam combining optical path is canceled, the power consumption and the complexity of the optical system are effectively reduced, the integration level, the reliability and the stability of the optical system are improved, and the realization of industrialization is facilitated.
In a preferred embodiment of the present utility model, the first modulation module 300 includes a first acousto-optic modulator 701 and a first beam limiting element 801, where the first acousto-optic modulator 701 is disposed on an output optical path of a transmitted beam, and the first acousto-optic modulator controls the amplitude and frequency of an applied radio frequency signal to achieve power adjustment, frequency shift and time control of the transmitted beam, so as to generate diffracted light with a required frequency shift amount. The first beam limiting element 801 is provided on the output optical path of the first acousto-optic modulator 701. Further, the first beam limiting element 801 may employ a diaphragm that can allow the desired diffracted order beam to pass therethrough while blocking the 0 th and other diffracted order beams, thereby achieving a beam limiting function. Thus, the light beam transmitted through the first beam limiting element 801 can be output as the probe light 10 to the subsequent physical system.
In a preferred embodiment of the present utility model, the second modulation module 400 includes a second optical modulator 702 and a second beam limiting element 802, where the second optical modulator 702 is disposed on an output optical path of the reflected light beam, and the second optical modulator 702 controls the amplitude and frequency of the applied rf signal to achieve power adjustment, frequency shift and timing control of the reflected light beam, so as to generate diffracted light with a required frequency shift amount. The second beam limiting element 802 is disposed on the output optical path of the second optical modulator 702. Further, the second beam limiting element 802 may employ a diaphragm, which can allow the required diffracted-order beam to pass therethrough and block the 0 th and other diffracted-order beams, so as to implement the beam limiting function, and the beam passing through the second beam limiting element 802 is used as cooling light. The electro-optical modulator 9 is disposed on the output optical path of the second beam limiting element 802, and after the light beam (cooling light) transmitted through the second beam limiting element 802 enters the electro-optical modulator 9, the modulation depth and the modulation frequency are controlled to generate heavy pump light and pumping light, so as to output the cooling light, the heavy pump light and the pumping light 11 to a subsequent physical system.
Referring to fig. 2, in a preferred embodiment of the present utility model, the laser generating module 100 includes a laser 1, an isolator 2, a laser beam splitter and a laser frequency stabilizer 5, the isolator 2 is disposed on an output optical path of the laser 1, and the isolator 2 can reduce adverse effects of reflected light on spectral output power and frequency stability of a light source to a great extent. The laser beam splitter is arranged on the output light path of the isolator 2, the light beam output by the isolator 2 is split into reflected laser and transmitted laser after passing through the laser beam splitter, the laser frequency stabilizer 5 is arranged on the output light path of the reflected laser, the laser frequency stabilizer 5 is used for stabilizing the frequency of the laser 1 according to the reflected laser, and the transmitted laser is output to the beam splitting module 200 as a main light beam.
The laser frequency stabilizer 5 is used for locking the frequency of the output light of the laser 1 on an atomic specific transition spectrum line, and a saturated absorption spectrum frequency stabilizing module, a modulation transfer spectrum frequency stabilizing module or other reasonable frequency stabilizing modules can be selected according to actual requirements.
Further, the laser beam splitter may include a first half-wave plate 301 and a first polarization splitting prism 401, where the first half-wave plate 301 is disposed on an output optical path of the isolator 2, the first polarization splitting prism 401 is disposed on an output optical path of the first half-wave plate 301, and the first half-wave plate 301 is used in cooperation with the first polarization splitting prism 401 to split the reflected laser beam and the transmitted laser beam with an adjustable splitting ratio. However, the utility model is not limited thereto, and in other embodiments, the function of the laser beam splitter may be implemented by using other optical elements such as a non-polarized beam splitter prism or beam splitter, and an optical fiber coupler with a specific beam splitting ratio, and may be reasonably selected according to specific situations.
In a preferred embodiment of the present utility model, the beam splitting module 200 may include a second half-wave plate 302 and a second polarization splitting prism 402, where the second half-wave plate 302 is disposed on an output optical path of the main beam, the second polarization splitting prism 402 is disposed on an output optical path of the second half-wave plate 302, and the second half-wave plate 302 is used in combination with the second polarization splitting prism 402 to split the reflected beam and the transmitted beam with an adjustable splitting ratio. However, the present utility model is not limited thereto, and in other embodiments, the function of the beam splitting module 200 may be implemented by using other optical elements such as a non-polarized beam splitting prism or beam splitter, and an optical fiber coupler with a specific beam splitting ratio, and may be reasonably selected according to specific situations.
Further, the beam splitting module 200 further includes a reflecting element 6, where the reflecting element 6 may be disposed on an output optical path of the transmitted beam to guide the transmitted beam to the first modulating module 300; alternatively, the reflecting element 6 is disposed on the output optical path of the reflected light beam to guide the reflected light beam to the second modulation module 400. The reflective element 6 is used for reflecting the light beam, so that the occupied space of the optical system can be reduced, and the integration level of the optical system can be improved. Wherein the reflecting element 6 may be a 45 ° mirror.
Referring to fig. 2, in an embodiment, the reflective element 6 is disposed on an output optical path of the reflected light beam to guide the reflected light beam to the second modulation module 400, so as to reduce an occupied space of the optical system and improve an integration level of the optical system. In the diffuse reflection cold atomic clock optical system, laser light output by a laser 1 is divided into transmission laser light and reflection laser light after passing through an isolator 2, a first half-wave plate 301 and a first polarization splitting prism 401, the reflection laser light enters a laser frequency stabilizer 5 to perform frequency stabilization control on the laser 1, and the transmission laser light is output to a beam splitting module 200 as a main beam. The main beam is divided into a transmitted beam and a reflected beam by the second half-wave plate 302 and the second polarization splitting prism 402, the transmitted beam directly enters the first acousto-optic modulator 701, the diffracted light with the required frequency shift amount is generated after the transmitted beam is modulated by the first acousto-optic modulator 701, and then the first beam limiting element 801 blocks the 0 th order and other diffracted order light to only keep the light with the required diffraction order to transmit, so that the detection light 10 is output. The reflected light beam enters the second acoustic modulator 702 after being reflected by the reflecting element 6, and is modulated by the second acoustic modulator 702 to generate diffracted light with a required frequency shift amount, then the second beam limiting element 802 blocks light of the 0 th order and other diffracted orders from transmitting only the light of the required diffracted orders, so as to generate cooling light, and after the cooling light enters the electro-optical modulator 9, heavy pump light and pumping light are generated by controlling modulation depth and modulation frequency, and finally the cooling light, the heavy pump light and the pumping light 11 are output.
Referring to fig. 3, fig. 3 is a schematic diagram of an optical system of a diffuse reflection cold atomic clock according to another embodiment of the present utility model. In another embodiment, the reflecting element 6 is disposed on the output light path of the transmitted light beam, so as to guide the transmitted light beam to the first modulating module 300, reduce the occupied space of the optical system, and improve the integration level of the optical system. In the diffuse reflection cold atomic clock optical system, laser light output by a laser 1 is divided into transmission laser light and reflection laser light after passing through an isolator 2, a first half-wave plate 301 and a first polarization splitting prism 401, the reflection laser light enters a laser frequency stabilizer 5 to perform frequency stabilization control on the laser 1, and the transmission laser light is output to a beam splitting module 200 as a main beam. The main beam is divided into a transmitted beam and a reflected beam by the second half-wave plate 302 and the second polarization splitting prism 402, the transmitted beam enters the first acousto-optic modulator 701 after being reflected by the reflecting element 6, the diffracted light with the required frequency shift amount is generated after being modulated by the first acousto-optic modulator 701, and then the first beam limiting element 801 blocks the 0 th order and other diffracted orders from transmitting only the light with the required diffraction order, so that the detection light 10 is output. The reflected light beam directly enters the second acoustic modulation device 702, the diffracted light with the required frequency shift amount is generated after the reflected light beam is modulated by the second acoustic modulation device 702, then the second beam limiting element 802 blocks the 0-order light and other diffracted-order light to only keep the required diffracted-order light to transmit, so that cooling light is generated, after the cooling light enters the electro-optical modulator 9, heavy pump light and pumping light are generated by controlling the modulation depth and the modulation frequency, and finally the cooling light, the heavy pump light and the pumping light 11 are output.
In the diffuse reflection cold atomic clock optical system, the number of the used lasers is reduced from two common lasers to one common lasers, the number of the acousto-optic modulators is reduced from four common lasers to two acousto-optic modulators, heavy pump light and pumping light are generated on the basis of cooling light, meanwhile, a beam combining light path is omitted, periodic vibration caused by the use of a mechanical optical switch is avoided, the number of optical devices used by the optical system is obviously reduced, the power consumption and the complexity of the optical system are effectively reduced, the integration level, the reliability and the stability of the optical system are improved, and industrialization is facilitated.
In one embodiment, specific to a particular 133 After Cs (cesium) diffuse reflection cold atomic clock adopts an optical system shown in fig. 2, laser 1 outputs a laser beam with a wavelength of 852.3nm, and the laser beam is split into two beams after passing through isolator 2, first half-wave plate 301 and first polarization splitting prism 401, wherein the reflected laser enters laser frequency stabilizer 5 to lock laser 1 at 6 2 S 1/2 |F=4>—6 2 P 3/2 |F=3>And 6 2 S 1/2 |F=4>—6 2 P 3/2 |F=5>Cross of (2)On the peak, the transmitted laser is split into two beams after passing through the second half wave plate 302 and the second polarization beam splitting prism 402, the transmitted beam is output to the first acousto-optic modulator 701 as a main beam, the frequency is shifted by 226.12MHz through the first acousto-optic modulator 701, and the transmitted beam is transmitted into a physical system as a detection light after passing through the first beam limiting element 801; the reflected light beam enters the second optical modulator 702 after passing through the reflecting element 6, is shifted in frequency by 210MHz by the second optical modulator 702, and enters the electro-optical modulator 9 after passing through the second beam limiting element 802. In the cooling phase, the electro-optic modulator 9 applies a radio frequency of 9.192GHz, intrinsic light as cooling light, +1-level light and 6 2 S 1/2 |F=3>—6 2 P 3/2 |F=4>Transition resonance is adopted as heavy pump light, and proper modulation depth is selected to enable the cooling light and the heavy pump light power to meet the use requirement; during the pumping phase, the electro-optic modulator 9 applies a radio frequency of 436.12MHz, -1 order light as pumping light, which is then transmitted into the physical system.
Referring to fig. 4, fig. 4 is a schematic diagram showing the output frequencies of the light beams in the application of the optical system of the diffuse reflection cold atomic clock according to the embodiment. In which the cooling light-16 MHz is detuned to 6 2 S 1/2 |F=4>—6 2 P 3/2 |F=5>Transition, heavy pump light resonates at 6 2 S 1/2 |F=3>—6 2 P 3/2 |F=4>Transition, pumping light resonates at 6 2 S 1/2 |F=4>—6 2 P 3/2 |F=3>Transition, detection light resonates at 6 2 S 1/2 |F=4>—6 2 P 3/2 |F=5>. In a single clock cycle, after the action of the cooling light and the heavy pump light, the atoms are cooled and prepared to 6 2 S 1/2 |F=4>In state, the atom is then prepared to 6 by pumping light 2 S 1/2 |F=3>In state, ramsey action is then carried out, and finally 6 is detected by using detection light 2 S 1/2 |F=4>Atomic population in the state.
Of course, the utility model is not limited thereto, and in other embodiments, the optical system may be applied to cold atomic clocks of other media, and specific laser wavelength, frequency shift parameters and the like may be set reasonably according to practical situations.
In summary, the utility model provides a diffuse reflection cold atomic clock optical system, which reduces the number of lasers from two to one common lasers, reduces the number of acousto-optic modulators from four common lasers to two common lasers, simultaneously eliminates a beam combining optical path on the basis of cooling light, avoids periodic vibration caused by the use of a mechanical optical switch, obviously reduces the number of optical devices used by the optical system, effectively reduces the power consumption and complexity of the optical system, improves the integration level, reliability and stability of the optical system, and is convenient for industrialization.
The utility model has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the utility model. It should be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (10)
1. A diffusely reflective cold atomic clock optical system, characterized by: the device comprises a laser generation module, a beam splitting module, a first modulation module, a second modulation module and an electro-optic modulation module;
the laser generation module is used for outputting a main beam, the beam splitting module is arranged on an output light path of the main beam, the beam splitting module splits the main beam into a transmission beam and a reflection beam, the first modulation module is arranged on the output light path of the transmission beam, the first modulation module is used for modulating the transmission beam and selecting a required diffraction order beam, and the transmission beam is output as detection light after being acted by the first modulation module; the second modulation module is arranged on the output light path of the reflected light beam and is used for modulating the reflected light beam and selecting a light beam with a required diffraction order; the electro-optical modulation module is arranged on an output light path of the second modulation module and comprises an electro-optical modulator, and the electro-optical modulator is used for modulating the light beam output by the second modulation module and outputting cooling light, heavy pump light and pumping light.
2. The diffusely reflective cold atomic clock optical system as claimed in claim 1, wherein: the laser generation module comprises a laser, an isolator, a laser beam splitter and a laser frequency stabilizer, wherein the isolator is arranged on an output light path of the laser, the laser beam splitter is arranged on an output light path of the isolator, a beam output by the isolator is split into reflected laser and transmitted laser after passing through the laser beam splitter, the laser frequency stabilizer is arranged on an output light path of the reflected laser, the laser frequency stabilizer is used for stabilizing the frequency of the laser according to the reflected laser, and the transmitted laser is output to the beam splitting module as a main beam.
3. The diffusely reflective cold atomic clock optical system as claimed in claim 2, wherein: the laser beam splitter comprises a first half-wave plate and a first polarization beam splitter prism, wherein the first half-wave plate is arranged on an output light path of the isolator, the first polarization beam splitter prism is arranged on an output light path of the first half-wave plate, and the first half-wave plate is matched with the first polarization beam splitter prism for use so as to split the reflected laser and the transmitted laser with an adjustable beam splitting ratio.
4. The diffusely reflective cold atomic clock optical system as claimed in claim 1, wherein: the beam splitting module comprises a second half-wave plate and a second polarization splitting prism, the second half-wave plate is arranged on an output light path of the main light beam, the second polarization splitting prism is arranged on an output light path of the second half-wave plate, and the second half-wave plate is matched with the second polarization splitting prism to perform beam splitting ratio adjustable beam splitting on the reflected light beam and the transmitted light beam.
5. The diffusely reflective cold atomic clock optical system as claimed in claim 4, wherein: the beam splitting module further comprises a reflecting element, and the reflecting element is arranged on the output light path of the transmitted light beam so as to guide the transmitted light beam to the first modulation module; or the reflecting element is arranged on the output light path of the reflected light beam so as to guide the reflected light beam to the second modulation module.
6. The diffusely reflective cold atomic clock optical system as claimed in claim 5, wherein: the reflecting element is a 45 ° mirror.
7. The diffusely reflective cold atomic clock optical system as claimed in claim 1, wherein: the first modulation module comprises a first acousto-optic modulator and a first beam limiting element, the first acousto-optic modulator is arranged on an output light path of the transmitted light beam, and the first beam limiting element is arranged on the output light path of the first acousto-optic modulator.
8. The diffusely reflective cold atomic clock optical system as claimed in claim 7, wherein: the first beam limiting element is a diaphragm.
9. The diffusely reflective cold atomic clock optical system as claimed in claim 1, wherein: the second modulation module comprises a second optical modulator and a second beam limiting element, the second optical modulator is arranged on the output light path of the reflected light beam, the second beam limiting element is arranged on the output light path of the second optical modulator, and the electro-optical modulator is arranged on the output light path of the second beam limiting element.
10. The diffusely reflective cold atomic clock optical system as claimed in claim 9, wherein: the second beam limiting element is a diaphragm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321395240.7U CN219978711U (en) | 2023-06-02 | 2023-06-02 | Diffuse reflection cold atomic clock optical system |
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| CN202321395240.7U CN219978711U (en) | 2023-06-02 | 2023-06-02 | Diffuse reflection cold atomic clock optical system |
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