CN216490511U - Optical fiber access plug-and-play type double-photon atom microwave sensor - Google Patents
Optical fiber access plug-and-play type double-photon atom microwave sensor Download PDFInfo
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- CN216490511U CN216490511U CN202123450238.9U CN202123450238U CN216490511U CN 216490511 U CN216490511 U CN 216490511U CN 202123450238 U CN202123450238 U CN 202123450238U CN 216490511 U CN216490511 U CN 216490511U
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Abstract
The utility model discloses a two optical atom microwave sensor of plug-and-play formula are inserted to optic fibre, including non-metal housing and non-metal top lid, set up first laser fiber input interface on one side of non-metal housing, second laser fiber input interface and electronic output interface, the optics metal mesa passes through shockproof rubber stabilizer blade to be supported and fixes inside non-metal housing, it is fixed to connect through shockproof rubber between optics metal mesa and the non-metal housing, first speculum, the second speculum, the third speculum, the fourth speculum, the half slide, polarization beam splitter prism, the quarter slide, first dichroic mirror, the second dichroic mirror, the atom air chamber, first barn door, second barn door and photoelectric detector all set up on the base that corresponds through the branch that corresponds, each base is fixed on the optics metal mesa. The utility model discloses satisfy the demand of surveying microwave in the atom sensor field.
Description
Technical Field
The utility model belongs to the technical field of microwave electric field surveys, concretely relates to two optical atom microwave sensor of plug-and-play formula are inserted to optic fibre. The method is suitable for the application fields of detection, communication and the like of the weak microwave field.
Background
The microwave communication system is composed of transmitter, receiver, antenna feeder system, multiplexer and user terminal. The microwave receiver is the most important part, namely, a microwave detection system, and the detection of the microwave can be applied to not only the communication industry, but also weapon remote detection technology, aviation technology, remote sensing technology, remote human body vital sign monitoring technology and the like. The conventional microwave detecting antenna uses a load dipole antenna with impedance and a diode detector, the output of the diode is connected with a direct current voltage meter (about 10000 kq/m) through a high-impedance electric wire, when the diode is placed in an electric field, the diode will modify the electromagnetic field and then record the direct current voltage, and the voltage value will change along with the change of the electromagnetic field. This type of detector, although used for more than 40 years, still has its drawbacks: (1) it requires calibration and the calibration process is cumbersome; (2) the sensitivity of the probe may be affected by the length of the dipole antenna; (3) the metal in the probe can interfere with the field being measured; (4) the lowest field intensity which can be detected by the probe is 100 mV/m; (5) the operating frequency band of the antenna is narrow. In a quantum system, a microwave antenna composed of rydberg atoms can just overcome the defects. Because the atoms in the rydberg state have a large atomic scale (proportional to n)2) Weakly bound by atomic mass (proportional to n)-2) The characteristics of (1) are easy to be influenced by external fields; the rydberg-state atoms have a large induced electric dipole moment and have strong interaction in an external field; and the energy level spacing of atoms in the Gordburg states is small, and the transition frequency between adjacent Reedbburg states (100MHz-500 GHz) is generally in the microwave range. These properties make the rydberg atoms very advantageous for measuring microwave electric fields, especially weak electric fields. Some research groups have studied the sensors of the rydberg atoms experimentally and theoretically, and have achieved high sensitivity in measuring the microwave electric field.
However, the configuration of the existing experimental device based on dual-optical microwave detection adopts a dual-optical correlation mode, and the correlation mode requires that two beams of laser are respectively incident from two sections of the cavity part acted by the riedberg atomic microwave sensor, so that the laser access part and the cavity part acted by the atomic microwave sensor cannot be separated, the device of the sensing assembly cannot be realized, and the experimental device is convenient for people to use, produce and assemble.
The utility model discloses based on many characteristics of the atomic sensor in Reidberg and laboratory's achievement, propose and realized one kind with optical components and parts integration in a small-size optics box to design the plug-and-play access formula coupling interface of full fiber. The device has strong anti-interference capability, small volume and convenient use, can be produced in large scale, and can be widely applied to important fields of weak microwave field detection, communication and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned problem that prior art exists, provide a two optical atom microwave sensors of plug-and-play formula are inserted to optic fibre, satisfy the demand of surveying microwave in the atomic sensor field.
The above object of the present invention is achieved by the following technical means:
an optical fiber plug-and-play type double-photon atomic microwave sensor comprises a first laser optical fiber input interface and a second laser optical fiber input interface, wherein first wavelength light input through the first laser optical fiber input interface passes through a half glass sheet and then transmits a polarization beam splitter prism, then passes through a quarter glass sheet and then transmits a first dichroic mirror to form first to-be-combined beam light, second wavelength light input through the second laser optical fiber input interface is reflected through the first dichroic mirror to form second to-be-combined beam light, the first to-be-combined beam light and the second to-be-combined beam light form incident combined beam light, the incident combined beam light forms emergent combined beam light after passing through an atomic gas chamber, second wavelength light in the emergent combined beam light is separated by the second dichroic mirror and then is irradiated on a first light baffle, first wavelength light in the emergent combined beam light is reflected by a fourth vertical silvered reflector, reflected light obtained by the fourth vertical silvered reflector sequentially passes through the second dichroic mirror, The atomic gas chamber, the first dichroic mirror and the quarter glass are reflected by the polarization splitting prism and then detected by the photoelectric detector, and the photoelectric detector is connected with the electronic output interface.
The atomic gas chamber is plated with a broadband antireflection film as described above.
The utility model provides an optic fibre inserts plug-and-play formula two optical atom microwave sensor, still include non-metal housing and cover and establish the non-metal top lid on non-metal housing, set up first laser fiber input interface on one side of non-metal housing, second laser fiber input interface and electronic output interface, the optics metal mesa passes through shockproof rubber stabilizer blade to be supported and fixes inside non-metal housing, it is fixed to connect through shockproof rubber between optics metal mesa and the non-metal housing, first speculum, the second speculum, the third speculum, the fourth speculum, the half slide, polarization beam splitter prism, the quarter slide, first dichroscope, the second dichroscope, the atom air chamber, first barn door, second barn door and photoelectric detector all set up on the base that corresponds through the branch that corresponds, each base is fixed on the optics metal mesa.
Compared with the prior art, the utility model, have following advantage:
1. the utility model discloses stable in structure satisfies the demand of surveying microwave in the atomic sensor field.
2. The utility model discloses thoroughly part atomic microwave sensor and outside laser system, become more succinct facility, convenient dismantlement and equipment can large-scale production and application.
3. The utility model discloses integrate all devices in a non-metallic box, reduce the volume greatly, save the cost, can use after the internal element debugging is fixed, use at every turn and need not readjust the optimization, it is very convenient.
4. The optical fiber interfaces are concentrated on one side of the box body, plug and play are achieved, and the first wavelength light and the second wavelength light with different frequencies can be replaced according to respective requirements, so that different requirements are met.
Drawings
FIG. 1 is a schematic cross-sectional view of a main frame;
wherein:
11-a non-metallic housing;
12-a non-metallic top cover;
13-laser fiber input interface;
14-shockproof rubber feet;
15-an optical metal platform;
161-base, 162-strut;
and 17, an electronic output interface.
FIG. 2 is a schematic diagram of the main optical structure of the present invention;
wherein:
131-a first laser fiber input interface, 132-a first laser fiber input interface;
211-first mirror, 212-second mirror, 213-third mirror, 214-fourth mirror;
22-one-half slide;
23-a polarization beam splitter prism;
24-quarter slide;
251-first dichroic mirror, 252-second dichroic mirror;
26-atomic gas cell;
271-a first light barrier, 272-a second light barrier;
28-photodetector.
Fig. 3 is a simplified diagram of an embodiment of the present invention, wherein (a) is a first embodiment of measurement and (b) is a second embodiment of measurement;
wherein: 31-atomic microwave sensor (the utility model is abbreviated); 32-carrier wave; 33-local field.
Detailed Description
To facilitate understanding and practice of the invention by those of ordinary skill in the art, the invention is described in further detail below with reference to examples, it being understood that the examples described herein are for purposes of illustration and explanation only and are not intended to be limiting.
The following combined light of a first wavelength at 780nm and a second wavelength at 1480nm85Scheme of Rb atom to n ═ 70 rydberg stateThe working principle of the present invention is explained based on examples.
As shown in fig. 1, the optical fiber plug-and-play type dual-photon atomic microwave sensor comprises a box body composed of a non-metal shell 11 and a non-metal top cover 12, wherein a laser optical fiber input interface 13 and an electronic output interface 17 are distributed on the left side surface of the box body. Inside the box, the optical metal table 15 is supported and fixed inside the box through the shockproof rubber support legs 14, and meanwhile, the optical metal table 15 is also fixed with the non-metal shell 11 through shockproof rubber flexible connection, so that an integrated shockproof optical platform is constructed. Based on the shockproof optical platform, each optical component in the box body is arranged on the corresponding base 161 through the corresponding supporting rod 162, each base 161 is fixed on the optical metal table top 15, the optical component comprises a first reflecting mirror 211, a second reflecting mirror 212, a third reflecting mirror 213, a fourth reflecting mirror 214, a half glass sheet 22, a polarization beam splitter 23, a quarter glass sheet 24, a first dichroic mirror 251, a second dichroic mirror 252, an atom air chamber 26, a first light barrier 271, a second light barrier 272 and a photoelectric detector 28, wherein the first light barrier 271 can also be directly adhered to the inner wall of the box body.
The laser fiber input interface 13 includes a first laser fiber input interface 131 and a second laser fiber input interface 132, which respectively correspond to the input of the first wavelength light with a wavelength of 780nm and the second wavelength light with a wavelength of 1480 nm.
The second wavelength light input through the second laser fiber input interface 132 is reflected by the third reflecting mirror 231 and then reflected by the first dichroic mirror 251 to form a second light beam to be combined.
The first wavelength light input through the first laser fiber input interface 131 is reflected sequentially by the first reflecting mirror 211 and the second reflecting mirror 212, passes through the half glass 22 and then transmits the polarization beam splitter prism 23 (a small amount of reflected light generated by the polarization beam splitter prism 23 is absorbed by the second light blocking plate 272), the half glass 22 can be used for adjusting the power of 780nm laser light, passes through the quarter glass 24 and then transmits the first dichroic mirror 251 to form first beam to be combined, and the first beam to be combined and the second beam to be combined form incident beam to be combined. The incident combined beam passes through the atomic gas chamber 26(RB gas chamber) coated with a broadband antireflection film to form an emergent combined beam, laser with the wavelength of 1480nm in the emergent combined beam is separated by the second dichroic mirror 252 and impinges on the first light barrier 271, laser with the wavelength of 780nm in the emergent combined beam is reflected by the vertically silvered fourth reflector 214 and then returns along the original optical path, namely, reflected light obtained by reflection of the vertically silvered fourth reflector 214 sequentially passes through the second dichroic mirror 252, the atomic gas chamber 26, the first dichroic mirror 251 and the quarter glass 24, is reflected by the polarizing beam splitter prism 23 and then detected by the photoelectric detector 28, the photoelectric detector 28 converts the received optical signal into an electrical signal, and the electrical signal is output to the signal processing circuit through the electronic output interface 17.
Fig. 3 shows two embodiments of the present invention of a fiber access plug-and-play dual-photon microwave sensor. The first embodiment is that the atomic microwave sensor 31 directly receives the carrier 32 carrying the baseband signal, and the carrier 32 carrying the baseband signal acts on the atomic gas cell 26(RB gas cell). This embodiment is suitable for situations where the carrier 32 is strong, but the baseband signal is weak. In this embodiment, the electrical output interface 17 may directly output the baseband signal due to the "self-demodulation" nature of the atomic microwave sensor. The second embodiment is to locally set a strong local field 33 in the atomic microwave sensor 31 and then receive the remotely propagated carrier 32, and the remotely propagated carrier 32 acts on the atomic gas cell 26(RB gas cell), wherein the local field 33 has a very small frequency difference with the carrier 32, which is suitable for the situation where the power of the carrier 32 is small. In this embodiment, the electrical output interface 17 outputs a new modulated signal carrying the baseband signal, which needs to be demodulated.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (3)
1. An optical fiber access plug-and-play type double-optical atomic microwave sensor comprises a first laser optical fiber input interface (131) and a second laser optical fiber input interface (132), and is characterized in that first wavelength light input through the first laser optical fiber input interface (131) passes through a half glass sheet (22) and then transmits a polarization beam splitter prism (23), then passes through a quarter glass sheet (24) and then transmits a first dichroic mirror (251) to form first light to be combined, second wavelength light input through the second laser optical fiber input interface (132) is reflected by the first dichroic mirror (251) to form second light to be combined, the first light to be combined and the second light to be combined form incident combined light, the incident combined light passes through an atomic gas chamber (26) and then forms emergent combined light, and second wavelength light in the emergent combined light is separated by the second dichroic mirror (252) and hits a first light barrier (271), the first wavelength light in the outgoing combined light is reflected by a fourth reflector (214) which is vertically silvered, reflected light obtained by reflection of the fourth reflector (214) sequentially passes through a second dichroic mirror (252), an atom gas chamber (26), a first dichroic mirror (251) and a quarter glass sheet (24), is reflected by a polarization splitting prism (23) and then is detected by a photoelectric detector (28), and the photoelectric detector (28) is connected with an electronic output interface (17).
2. The fiber access plug-and-play dual-photon atomic microwave sensor according to claim 1, wherein the atomic gas chamber (26) is coated with a broadband antireflection coating.
3. The optical fiber access plug-and-play type double-photon microwave sensor according to claim 1, further comprising a non-metal housing (11) and a non-metal top cover (12) covering the non-metal housing (11), wherein a first laser optical fiber input interface (131), a second laser optical fiber input interface (132) and an electronic output interface (17) are arranged on one side of the non-metal housing (11), the optical metal table (15) is supported and fixed inside the non-metal housing (11) through a shockproof rubber support leg (14), the optical metal table (15) and the non-metal housing (11) are fixedly connected through a shockproof rubber, and the first reflector (211), the second reflector (212), the third reflector (213), the fourth reflector (214), a half glass (22), a polarization splitting prism (23), a quarter glass (24), a glass slide, The first dichroic mirror (251), the second dichroic mirror (252), the atom air chamber (26), the first light barrier (271), the second light barrier (272) and the photoelectric detector (28) are all arranged on the corresponding bases (161) through corresponding supporting rods (162), and each base (161) is fixed on the optical metal table top (15).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123450238.9U CN216490511U (en) | 2021-12-31 | 2021-12-31 | Optical fiber access plug-and-play type double-photon atom microwave sensor |
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| CN202123450238.9U CN216490511U (en) | 2021-12-31 | 2021-12-31 | Optical fiber access plug-and-play type double-photon atom microwave sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298551A (en) * | 2023-05-22 | 2023-06-23 | 广东省计量科学研究院（华南国家计量测试中心） | Plug-and-play type quantum sensing electromagnetic wave measurement system based on modularization |
-
2021
- 2021-12-31 CN CN202123450238.9U patent/CN216490511U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298551A (en) * | 2023-05-22 | 2023-06-23 | 广东省计量科学研究院（华南国家计量测试中心） | Plug-and-play type quantum sensing electromagnetic wave measurement system based on modularization |
| CN116298551B (en) * | 2023-05-22 | 2023-08-11 | 广东省计量科学研究院（华南国家计量测试中心） | Plug-and-play type quantum sensing electromagnetic wave measurement system based on modularization |
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