High-integration-level atomic spectrum device and method with stable laser system frequency for Rydberg atom preparation

Abstract

The invention discloses a high-integration-level atomic spectrum device and method with stable laser system frequency for Rydberg atom preparation, relates to the technical field of atomic spectrum frequency stabilization, and aims to solve the problems of low integration level, heavy weight, poor robustness and the like in the prior art and improve the integration level, reliability and practicability of the atomic spectrum device. The device comprises a laser spectrum atomic gas chamber; the laser spectrum atomic gas chamber comprises two cavities, and the end face of one cavity is connected with a modulation transfer spectrum saturated light input optical fiber, a modulation transfer spectrum detection light input optical fiber and a modulation transfer spectrum detection light output optical fiber. And the end face of the other cavity is connected with an EIT spectrum coupling light input optical fiber, an EIT spectrum detection light input optical fiber and an EIT spectrum detection light output optical fiber. The integration level, reliability and practicability of the atomic spectrum device can be improved, and the modulation transfer spectrum and the EIT spectrum can be obtained in a non-interference mode at the same time.

Description

Technical Field

[0001] This document relates to the technical field of atomic spectroscopy frequency stabilization, and in particular to a highly integrated atomic spectroscopy device and method for frequency stabilization of a laser system for Rydberg atom preparation. Background Art

[0002] In the traditional Rydberg atom preparation process, in order to achieve precise manipulation and measurement of the atomic state, a series of discrete optical components such as lasers, mirrors, lenses, fiber couplers, etc. are usually required. These components are combined through complex mechanical structures and optical path designs to complete specific experimental tasks. However, this method has the following significant disadvantages:

[0003] Low integration: Since each optical component is independently set, the entire system is bulky and occupies a lot of space. This not only increases the cost of the device, but also limits its application in small environments or mobile platforms.

[0004] Heavy weight: The large amount of metal frames and other supporting materials make traditional systems extremely heavy and difficult to carry and install, which is especially disadvantageous for field deployment.

[0005] Poor robustness: Discrete designs are easily affected by external vibrations, temperature changes, and other factors, reducing the stability and reliability of the system. In addition, a slight deviation in the position of any component in a complex optical path may cause the performance of the entire system to degrade or even fail.

[0006] Difficult to apply: The above problems make it difficult for traditional Rydberg atom preparation systems to meet the needs of practical application scenarios, such as portable devices, vehicle-mounted instruments, or other places that require compact designs. Therefore, such systems are more limited to laboratory environments and have not been more widely promoted and applied.

[0007] Based on this, the present invention proposes a highly integrated atomic spectroscopy device and method with a frequency-stabilized laser system for Rydberg atom preparation. Summary of the invention

[0008] This specification provides a highly integrated atomic spectroscopy device and method with a stable laser system frequency for Rydberg atom preparation, which is used to solve the problems of low integration, heavy weight, poor robustness in the prior art, and to improve the integration, reliability and practicality of the atomic spectroscopy device.

[0009] In a first aspect of the present invention, a highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation is provided, the device comprising a laser spectroscopy atomic gas cell;

[0010] The laser spectroscopy atomic gas chamber includes two cavities, wherein the end face of one cavity is connected with a modulation transfer spectrum saturation light input fiber, a modulation transfer spectrum detection light input fiber and a modulation transfer spectrum detection light output fiber.

[0011] The end face of the other cavity is connected with an EIT spectrum coupling light input fiber, an EIT spectrum detection light input fiber and an EIT spectrum detection light output fiber;

[0012] The modulation transfer spectrum detection light output optical fiber and the EIT spectrum detection light output optical fiber are both connected to a photoelectric detector.

[0013] Further, an end surface of one of the cavities is provided with a first input port, a second input port and a first output port;

[0014] The first input port is connected to the modulation transfer spectrum saturation light input fiber, the second input port is connected to the modulation transfer spectrum detection light input fiber, and the first output port is connected to the modulation transfer spectrum detection light output fiber.

[0015] Further, the end surface of the other cavity is provided with a third input port, a fourth input port and a second output port;

[0016] The third input port is connected to the EIT spectrum coupling light input fiber, the fourth input port is connected to the EIT spectrum detection light input fiber, and the second output port is connected to the EIT spectrum detection light output fiber.

[0017] Furthermore, the modulation transfer spectrum detection light input optical fiber and the modulation transfer spectrum saturation light input optical fiber are on the same axis.

[0018] Furthermore, the EIT spectrum detection light input optical fiber and the EIT spectrum coupling light input optical fiber are on the same axis.

[0019] Furthermore, the laser spectroscopy atomic gas cell is in a cylindrical structure, and a detection light anti-reflection film is provided on the end face. The two cavities of the laser spectroscopy atomic gas cell are respectively used to realize modulation transfer spectroscopy and EIT spectroscopy preparation.

[0020] Furthermore, the alkali metal injected into the laser spectroscopy atomic gas chamber is a cesium atom or a rubidium atom.

[0021] Furthermore, a beam splitter prism is installed on the first input port and the first output port, and the modulation transfer spectrum saturation light input optical fiber enters the laser spectrum atomic gas chamber through the beam splitter prism;

[0022] The detection light signal reflected or transmitted by the laser spectroscopy atomic gas cell is input into the modulation transfer spectroscopy detection light output optical fiber through a beam splitter prism.

[0023] Furthermore, a dichroic prism is installed on the third input port and the second output port, and the EIT spectrum coupling light input optical fiber enters the laser spectrum atomic gas chamber through the dichroic prism;

[0024] The detection light signal reflected or transmitted by the laser spectrum atomic gas cell and affected by the EIT effect is input into the EIT spectrum detection light output optical fiber through a dichroic prism.

[0025] In another aspect of the present invention, a highly integrated atomic spectroscopy method for stabilizing the frequency of a laser system for Rydberg atom preparation is provided, based on a highly integrated atomic spectroscopy device for stabilizing the frequency of a laser system for Rydberg atom preparation, the method comprising:

[0026] The modulation transfer spectrum detection light and the modulation transfer spectrum saturation light are introduced into the laser spectrum atomic gas chamber through the modulation transfer spectrum detection light input optical fiber and the modulation transfer spectrum saturation light input optical fiber respectively, and the modulation transfer spectrum signal is obtained by using a photodetector after being output through the modulation transfer spectrum detection light output optical fiber;

[0027] The EIT spectrum detection light and the EIT spectrum coupling light are introduced into the laser spectrum atomic gas chamber through the EIT spectrum detection light input fiber and the EIT spectrum coupling light input fiber respectively, and the EIT spectrum signal is obtained by using a photodetector after being output through the EIT spectrum detection light output fiber.

[0028] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0029] Improved integration: The present invention significantly reduces the overall volume and space occupied by the system by dividing a laser spectroscopy atomic gas chamber into two cavities, integrating the modulation transfer spectroscopy saturation light input fiber, modulation transfer spectroscopy detection light input fiber and modulation transfer spectroscopy detection light output fiber with one of the cavities, and integrating the EIT spectroscopy coupling light input fiber, EIT spectroscopy detection light input fiber and EIT spectroscopy detection light output fiber with the other cavity. This compact integrated design is conducive to reducing costs and makes the system more easily adaptable to various application scenarios, including small environments or mobile platforms.

[0030] Reduce weight: The present invention sets two cavities in one atomic gas chamber, so that one atomic gas chamber can realize the measurement of two optical fibers, instead of setting two atomic gas chambers as in the traditional method. In addition, the present invention does not use the traditional metal frame and other supporting materials, thus reducing the total weight of the system. This makes the equipment easier to carry and install, which is particularly beneficial for field deployment.

[0031] Enhanced robustness: Due to the high integration of multiple optical fibers in the present invention, an integrated design is achieved, which reduces the impact of external vibration, temperature change and other factors on system stability. In addition, since the number of components in the complex optical path is reduced, the risk of system performance degradation due to position deviation of a single component is reduced, and the reliability and durability of the system are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 The schematic diagram of the structure of a highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0035] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0036] Figure 1 FIG. 1 is a schematic diagram of a highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to the present invention. Figure 1 , the device comprises a laser spectroscopy atomic gas chamber 4;

[0037] The laser spectroscopy atomic gas chamber 4 includes two cavities, and the end face of one cavity is connected with a modulation transfer spectrum saturation light input fiber 1, a modulation transfer spectrum detection light input fiber 5 and a modulation transfer spectrum detection light output fiber 3.

[0038] The end face of the other cavity is connected with the EIT spectrum coupling light input fiber 7, the EIT spectrum detection light input fiber 9 and the EIT spectrum detection light output fiber 6;

[0039] The modulation transfer spectrum detection light output optical fiber 3 and the EIT spectrum detection light output optical fiber 6 are both connected to a photoelectric detector.

[0040] The modulation transfer spectrum saturation light input optical fiber 1 in the present invention is used to introduce saturation light, usually a beam of high-intensity laser, to prepare the Rydberg state.

[0041] Modulation transfer spectroscopy probe light input fiber 5: introduces probe light, usually low-intensity laser, to detect the modulated atomic state.

[0042] Modulation transfer spectroscopy detection light output fiber 3: collects the detection light signals reflected or transmitted from the atomic gas chamber, which contain information about the internal state of the atoms.

[0043] EIT spectroscopy coupling light input fiber 7: introduces coupling light to interact with atoms to create a transparent window.

[0044] EIT spectrum detection light input fiber 9: introduces detection light to observe the state of atoms through this transparent window.

[0045] EIT spectrum detection light output fiber 6: collects the detection light signal after being affected by the EIT effect.

[0046] The present invention comprises the following steps during implementation:

[0047] Preparation stage: First, make sure all optical fibers are connected correctly and adjust the laser parameters such as wavelength and power to match the required spectral conditions. Then fill the atomic chamber with target atoms such as rubidium and cesium and maintain the appropriate temperature and pressure environment.

[0048] Operation process: Start the laser source and guide the beam into each cavity through the corresponding optical fiber. For modulation transfer spectroscopy, the atoms are first irradiated with saturation light, and then the state is detected using probe light; for EIT spectroscopy, both coupled light and probe light are used to conduct the experiment. During the whole process, the laser frequency stability is continuously monitored and adjusted to ensure accurate spectral measurement results.

[0049] Data acquisition and analysis: Use a photodetector or other suitable sensor to receive the signal from the output fiber and convert it into an electronic signal for further processing. By analyzing these signals, important information about the Rydberg atoms, such as the energy level structure, transition probability, etc., can be obtained.

[0050] The present invention installs a modulation transfer spectrum saturation light input fiber 1, a modulation transfer spectrum detection light input fiber 5 and a modulation transfer spectrum detection light output fiber 3 at the end face of the first cavity. These optical fibers are responsible for transmitting lasers used to excite and detect Rydberg states.

[0051] On the end face of the second cavity, EIT spectrum coupling light input fiber 7, EIT spectrum detection light input fiber 9 and EIT spectrum detection light output fiber 6 are installed, and their function is to introduce and collect light signals related to the electromagnetic induced transparency EIT effect.

[0052] An end surface of one of the cavities is provided with a first input port, a second input port and a first output port;

[0053] As a further explanation of the present invention, the first input port is connected to the modulation transfer spectrum saturation light input fiber 1, the second input port is connected to the modulation transfer spectrum detection light input fiber 5, and the first output port is connected to the modulation transfer spectrum detection light output fiber 3.

[0054] The end surface of the other cavity is provided with a third input port, a fourth input port and a second output port;

[0055] The third input port is connected to the EIT spectrum coupling light input fiber 7 , the fourth input port is connected to the EIT spectrum detection light input fiber 9 , and the second output port is connected to the EIT spectrum detection light output fiber 6 .

[0056] In order to ensure that all optical fibers are accurately aligned with their respective optical paths, the present invention provides a beam splitter prism 2 and a dichroic prism 8, specifically:

[0057] The first input port and the first output port are provided with a beam splitter prism 2, and the modulation transfer spectrum saturation light input optical fiber 1 enters the laser spectrum atomic gas chamber 4 through the beam splitter prism 2;

[0058] The detection light signal reflected or transmitted by the laser spectrum atomic gas cell 4 is input into the modulation transfer spectrum detection light output optical fiber 3 through the beam splitter prism 2 .

[0059] The third input port and the second output port are provided with a dichroic prism 8, and the EIT spectrum coupling light input optical fiber 7 enters the laser spectrum atomic gas chamber 4 through the dichroic prism 8;

[0060] The detection light signal reflected or transmitted by the laser spectrum atomic gas cell 4 and influenced by the EIT effect is input into the EIT spectrum detection light output optical fiber 6 through the dichroic prism 8 .

[0061] As a further explanation of the present invention, the modulation transfer spectrum detection light input fiber 5 and the modulation transfer spectrum saturation light input fiber 1 are on the same axis, and the EIT spectrum detection light input fiber 9 and the EIT spectrum coupling light input fiber 7 are on the same axis.

[0062] As a further explanation of the present invention, the laser spectroscopy atomic gas chamber 4 is a cylindrical structure, and a detection light anti-reflection film is provided on the end face. The two cavities of the laser spectroscopy atomic gas chamber 4 are respectively used to realize modulation transfer spectroscopy and EIT spectroscopy preparation.

[0063] The alkali metal injected into the laser spectroscopy atomic gas chamber 4 is cesium atom or rubidium atom.

[0064] In a second aspect of the present invention, a highly integrated atomic spectroscopy method for stabilizing the frequency of a laser system for Rydberg atom preparation is proposed. Based on a highly integrated atomic spectroscopy device for stabilizing the frequency of a laser system for Rydberg atom preparation, the method comprises:

[0065] The modulation transfer spectrum detection light and the modulation transfer spectrum saturation light are introduced into the laser spectrum atomic gas chamber 4 through the modulation transfer spectrum detection light input optical fiber 5 and the modulation transfer spectrum saturation light input optical fiber 1 respectively, and the modulation transfer spectrum signal is obtained by using a photodetector after being output through the modulation transfer spectrum detection light output optical fiber 3;

[0066] The EIT spectrum detection light and the EIT spectrum coupling light are introduced into the laser spectrum atomic gas chamber 4 through the EIT spectrum detection light input optical fiber 9 and the EIT spectrum coupling light input optical fiber 7 respectively, and then output through the EIT spectrum detection light output optical fiber 6 to obtain the EIT spectrum signal using a photodetector.

[0067] Wherein, the modulation transfer spectrum saturation light in the laser spectrum atomic gas chamber 4 overlaps with the modulation transfer spectrum detection light in reverse;

[0068] The EIT spectrum coupling light overlaps with the EIT spectrum detection light in the opposite direction inside the laser spectrum atomic gas cell 4 .

[0069] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation, characterized in that: The device comprises a laser spectroscopy atomic gas cell (4); The laser spectrum atomic gas chamber (4) comprises two cavities, wherein the end face of one of the cavities is connected with a modulation transfer spectrum saturation light input optical fiber (1), a modulation transfer spectrum detection light input optical fiber (5) and a modulation transfer spectrum detection light output optical fiber (3). The end face of the other cavity is connected with an EIT spectrum coupling light input optical fiber (7), an EIT spectrum detection light input optical fiber (9) and an EIT spectrum detection light output optical fiber (6); The modulation transfer spectrum detection light output optical fiber (3) and the EIT spectrum detection light output optical fiber (6) are both connected to a photoelectric detector.

2. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 1, characterized in that: An end surface of one of the cavities is provided with a first input port, a second input port and a first output port; The first input port is connected to a modulation transfer spectrum saturation light input optical fiber (1), the second input port is connected to a modulation transfer spectrum detection light input optical fiber (5), and the first output port is connected to a modulation transfer spectrum detection light output optical fiber (3).

3. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 1, characterized in that: The end surface of the other cavity is provided with a third input port, a fourth input port and a second output port; The third input port is connected to the EIT spectrum coupling light input optical fiber (7), the fourth input port is connected to the EIT spectrum detection light input optical fiber (9), and the second output port is connected to the EIT spectrum detection light output optical fiber (6).

4. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 1, characterized in that: The modulation transfer spectrum detection light input optical fiber (5) and the modulation transfer spectrum saturation light input optical fiber (1) are located on the same axis.

5. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 1, characterized in that: The EIT spectrum detection light input optical fiber (9) and the EIT spectrum coupling light input optical fiber (7) are located on the same axis.

6. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 1, characterized in that: The laser spectrum atomic gas chamber (4) is in a columnar structure, and a detection light anti-reflection film is provided on the end face. The two cavities of the laser spectrum atomic gas chamber (4) are respectively used to realize the preparation of modulation transfer spectrum and EIT spectrum.

7. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 1, characterized in that: The alkali metal injected into the laser spectrum atomic gas chamber (4) is a cesium atom or a rubidium atom.

8. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 2, characterized in that: A beam splitter prism (2) is installed on the first input port and the first output port, and the modulation transfer spectrum saturation light input optical fiber (1) enters the laser spectrum atomic gas chamber (4) through the beam splitter prism (2); The detection light signal reflected or transmitted by the laser spectrum atomic gas chamber (4) is input into the modulation transfer spectrum detection light output optical fiber (3) through the beam splitter prism (2).

9. A highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation according to claim 3, characterized in that: A dichroic prism (8) is installed on the third input port and the second output port, and the EIT spectrum coupling light input optical fiber (7) enters the laser spectrum atomic gas chamber (4) through the dichroic prism (8); The detection light signal reflected or transmitted from the laser spectrum atomic gas chamber (4) and influenced by the EIT effect is input into the EIT spectrum detection light output optical fiber (6) through a dichroic prism (8).

10. A highly integrated atomic spectroscopy method with a stable laser system frequency for Rydberg atom preparation, based on a highly integrated atomic spectroscopy device with a stable laser system frequency for Rydberg atom preparation as claimed in any one of claims 1 to 9, characterized in that: The method includes: The modulation transfer spectrum detection light and the modulation transfer spectrum saturation light are introduced into the laser spectrum atomic gas chamber (4) through the modulation transfer spectrum detection light input optical fiber (5) and the modulation transfer spectrum saturation light input optical fiber (1) respectively, and the modulation transfer spectrum signal is obtained by using a photoelectric detector after being output through the modulation transfer spectrum detection light output optical fiber (3); The EIT spectrum detection light and the EIT spectrum coupling light are introduced into the laser spectrum atomic gas chamber (4) through the EIT spectrum detection light input optical fiber (9) and the EIT spectrum coupling light input optical fiber (7) respectively, and then output through the EIT spectrum detection light output optical fiber (6) to obtain the EIT spectrum signal using a photoelectric detector.

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