Multi-channel laser system with spectral energy feedback function

Abstract

The utility model relates to the technical field of laser systems, and discloses a multichannel laser system with a spectral energy feedback function, which comprises a nonlinear optical unit, the outer surface of the nonlinear optical unit is fixedly connected with a connecting end, and the other end of the connecting end is fixedly connected with a pump light incident mirror. The lower surface of the nonlinear optical unit is fixedly connected with a chopper, the lower surface of the chopper is fixedly connected with a wavelength selection lens A, the lower surface of the chopper is fixedly connected with a wavelength selection lens B, and the lower surface of the chopper is fixedly connected with a pump light wave band reflector. The chopper provided by the utility model realizes the selection between two light beams with different wavelengths output coaxially and a third light beam with different wavelengths output by another shaft through a sliding flat plate structure, and the optical axes output by the light beams are the same optical axis regardless of the selection result. And the number and the size of parts required by the multi-channel switching optical system are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser systems, in particular to a multi-channel laser system with a spectrum energy feedback function. Background Art

[0002] Laser systems with adjustable wavelengths have huge application demands. In a variety of detection or imaging scenarios, the pulsed lasers generated by such systems can greatly expand people's ability to distinguish the composition and internal structure of the objects being measured.

[0003] It is known that adjustable wavelength laser pulses are obtained by applying nonlinear crystals to be excited by pump light. Therefore, they have inherent disadvantages such as limited adjustment range and uneven excitation efficiency, which are inconvenient to use. When used as a light source in detection and imaging scenes, they bring additional errors to the comparison and analysis after signal acquisition. Therefore, it is of great significance to study the technical solution of optical systems that can combine and output multiple adjustable wavelength laser channels with different wavelength ranges and detect and calibrate the wavelength and energy of the output pulses. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-channel laser system with a spectral energy feedback function in order to solve the above-mentioned problems. By splitting the output light beam, the wavelength and energy of the output light beam can be detected, the accuracy of the detection can be ensured, and the feedback control of the output laser pulse parameters can be realized, thus solving the problems mentioned in the background technology.

[0005] In order to solve the above problems, the utility model provides a technical solution:

[0006] A multi-channel laser system with a spectral energy feedback function comprises a nonlinear optical unit, wherein the outer surface of the nonlinear optical unit is fixedly connected with a connection end, the other end of the connection end is fixedly connected with a pump light incident mirror, the lower surface of the nonlinear optical unit is fixedly connected with a chopper, the lower surface of the chopper is fixedly connected with a wavelength selection lens A, the lower surface of the chopper is fixedly connected with a wavelength selection lens B, and the lower surface of the chopper is fixedly connected with a pump light band reflector.

[0007] As a preferred solution of the utility model, the outer surface of the nonlinear optical unit is fixedly connected to a fixing rod, the bottom end of the fixing rod is fixedly connected to a connecting frame, the outer surface of the connecting frame is fixedly connected to a connecting rod, the upper surface of the connecting rod is fixedly connected to a fixing block, and the top end of the fixing block is fixedly connected to a pump light deflecting mirror.

[0008] As a preferred solution of the utility model, an extension rod is fixedly connected to the lower surface of the connecting frame, an extension block is fixedly connected to the outer surface of the extension rod, and a spectroscope is fixedly connected to the other end of the extension block.

[0009] As a preferred solution of the utility model, a T-shaped rod is fixedly connected to the outer surface of the extension block, and a spectral energy sensor is fixedly connected to the top end of the T-shaped rod.

[0010] As a preferred solution of the utility model, an input optical axis is arranged on the outer surface of the chopper, and the input optical axis is inserted into the interior of the pump light incident mirror.

[0011] As a preferred solution of the utility model, an output optical axis is arranged on the lower surface of the nonlinear optical unit, and the output optical axis is inserted into the interior of the beam splitter.

[0012] The beneficial effects of the utility model are as follows: 1. The chopper realizes the selection between two different wavelength light beams outputted coaxially and a third different wavelength light beam outputted from another axis through a sliding plate structure, and no matter what the selection result is, the optical axis of the light beam output is the same optical axis. The number and volume of components required for the multi-channel switching optical system are compressed.

[0013] 2. When the output light of the nonlinear optical unit is selected by the chopper, different selective light-transmitting lenses are used without changing the beam direction and position of the output light of the unit. Only when the third pump light beam is needed, the output direction of the beam is changed by the reflector. This design can reduce the difficulty of assembling and adjusting the optical system.

[0014] 3. By splitting the output beam, the wavelength and energy of the output beam can be detected, ensuring the accuracy of the detection and realizing feedback control of the output laser pulse parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For ease of explanation, the present invention is described in detail by the following specific implementations and drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall detailed structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall side structure of the utility model.

[0019] In the figure: 1, nonlinear optical unit; 2, connecting end; 3, pump light incident mirror; 4, chopper; 5, wavelength selection lens A; 6, wavelength selection lens B; 7, pump light band reflector; 8, fixing rod; 9, connecting frame; 10, connecting rod; 11, fixing block; 12, pump light deflecting mirror; 13, extension rod; 14, extension block; 15, spectroscope; 16, T-rod; 17, spectral energy sensor; 18, input optical axis; 19, output optical axis. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Example

[0022] See also Figure 1-Figure 3The utility model provides a technical solution: a multi-channel laser system with a spectral energy feedback function, comprising a nonlinear optical unit 1, wherein the converted wavelengths A and B are generated by the nonlinear optical unit 1 being excited by pump light, wherein a connection end 2 is fixedly connected to the outer surface of the nonlinear optical unit 1, wherein the function of the connection end 2 is to fix a pump light incident mirror 3, wherein the other end of the connection end 2 is fixedly connected to the pump light incident mirror 3, wherein a chopper 4 is fixedly connected to the lower surface of the nonlinear optical unit 1, wherein the chopper 4 can move to a corresponding position as required, wherein a wavelength selection lens A5 is fixedly connected to the lower surface of the chopper 4, wherein the wavelength selection lens A5 on the chopper 4 transmits the required wavelength light beam, and cuts off the unnecessary wavelength light beam, wherein a wavelength selection lens B6 is fixedly connected to the lower surface of the chopper 4, wherein the wavelength-converted light beam is selected by the wavelength selection lens B6 and then emitted along the aforementioned path through the output optical axis 19, wherein a pump light band reflector 7 is fixedly connected to the lower surface of the chopper 4, wherein a part of the light beam is diverted at the pump light source incident mirror and then emitted to the pump light source on the chopper 4 through the refracting along the original direction. A pump light band reflector 7, a fixing rod 8 is fixedly connected to the outer surface of the nonlinear optical unit 1, the fixing rod 8 is used to fix the connecting frame 9, the bottom end of the fixing rod 8 is fixedly connected to the connecting frame 9, the connecting rod 10 is fixedly connected to the outer surface of the connecting frame 9, the fixing block 11 is fixedly connected to the connecting rod 10, the upper surface of the connecting rod 10 is fixedly connected to the fixing block 11, the pump light deflecting mirror 12 is fixed by the fixing block 11, the top of the fixing block 11 is fixedly connected to the pump light deflecting mirror 12, the beam At the pump light source incident mirror, a part of the light is diverted along the original direction and injected into the pump light deflecting mirror 12. An extension rod 13 is fixedly connected to the lower surface of the connecting frame 9. An extension block 14 is fixedly connected to the outer surface of the extension rod 13. A spectrometer 15 is fixedly connected to the other end of the extension block 14. The incident spectrometer 15 injects a small part of the light beam into the spectral energy sensor 17. A T-bar 16 is fixedly connected to the outer surface of the extension block 14. The top of the T-bar 16 is fixedly connected to the spectral energy sensor 17 to measure its true wavelength and pulse energy value.

[0023] Furthermore, an input optical axis 18 is provided on the outer surface of the chopper 4, and a part of the incident system pump light enters the nonlinear optical unit 1 through the input optical axis 18 to obtain the converted wavelengths A and B and are emitted together. The input optical axis 18 is interspersed inside the pump light incident mirror 3, and an output optical axis 19 is provided on the lower surface of the nonlinear optical unit 1, and another part continues to be emitted from the system along the output optical axis 19, and the output optical axis 19 is interspersed inside the spectrometer 15.

[0024] In summary: working through external pump light, the pump light enters the system from the input optical axis 18 and is output from the system from the output optical axis 19. When the multi-channel laser system is in operation, three single wavelength light beams can be emitted from the output optical axis 19, namely, converted wavelength A laser, converted wavelength B laser, and pump light, wherein the converted wavelengths A and B are generated by the nonlinear optical unit 1 excited by the pump light.

[0025] When the converted wavelength A is needed, the chopper 4 moves to the rightmost position. At this time, a part of the incident system pump light enters the nonlinear optical unit 1 through the input optical axis 18 to obtain the converted wavelengths A and B and is emitted together. The required wavelength beam is transmitted through the wavelength selection lens A5 on the chopper 4, and the unnecessary wavelength beam is cut off. It is injected into the spectroscope 15 through the output optical axis 19, and a small part of the beam is injected into the spectral energy sensor 17 to measure its real wavelength and pulse energy value, and the other large part continues to be emitted from the system along the output optical axis 19.

[0026] When it is necessary to use the converted wavelength B, the chopper 4 moves to the center position, and the light beam runs along the aforementioned path in the same manner. The difference is that the light beam after the converted wavelength is selected by the wavelength selection lens B6 and then emitted along the aforementioned path through the output optical axis 19, and at the same time is diverted into the spectral energy sensor 17 to measure its true wavelength and pulse energy value.

[0027] When pump light is needed, the chopper 4 moves to the left position, and a part of the light beam is diverted at the pump light source incident mirror and incident along the original direction into the pump light deflection mirror 12. After deflection, it is incident toward the pump light band reflector 7 on the chopper 4, and is reflected and emitted along the output optical axis 19. It enters the spectrometer 15 and a small part of the light beam is incident into the spectral energy sensor 17 to measure its true wavelength and pulse energy value, and the other large part continues to be emitted from the system along the output optical axis 19.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-channel laser system with spectral energy feedback function, characterized in that: The invention comprises a nonlinear optical unit (1), wherein the outer surface of the nonlinear optical unit (1) is fixedly connected to a connection end (2), the other end of the connection end (2) is fixedly connected to a pump light incident mirror (3), the lower surface of the nonlinear optical unit (1) is fixedly connected to a chopper (4), the lower surface of the chopper (4) is fixedly connected to a wavelength selection lens A (5), the lower surface of the chopper (4) is fixedly connected to a wavelength selection lens B (6), and the lower surface of the chopper (4) is fixedly connected to a pump light band reflector (7).

2. A multi-channel laser system with spectral energy feedback function according to claim 1, characterized in that: The outer surface of the nonlinear optical unit (1) is fixedly connected to a fixing rod (8), the bottom end of the fixing rod (8) is fixedly connected to a connecting frame (9), the outer surface of the connecting frame (9) is fixedly connected to a connecting rod (10), the upper surface of the connecting rod (10) is fixedly connected to a fixing block (11), and the top end of the fixing block (11) is fixedly connected to a pump light deflecting mirror (12).

3. A multi-channel laser system with spectral energy feedback function according to claim 2, characterized in that: The lower surface of the connecting frame (9) is fixedly connected to an extension rod (13), the outer surface of the extension rod (13) is fixedly connected to an extension block (14), and the other end of the extension block (14) is fixedly connected to a beam splitter (15).

4. A multi-channel laser system with spectral energy feedback function according to claim 3, characterized in that: The outer surface of the extension block (14) is fixedly connected to a T-shaped rod (16), and the top end of the T-shaped rod (16) is fixedly connected to a spectral energy sensor (17).

5. The multi-channel laser system with spectral energy feedback function according to claim 1, characterized in that: An input optical axis (18) is arranged on the outer surface of the chopper (4), and the input optical axis (18) is inserted into the interior of the pump light incident mirror (3).

6. The multi-channel laser system with spectral energy feedback function according to claim 1, characterized in that: The lower surface of the nonlinear optical unit (1) is provided with an output optical axis (19), and the output optical axis (19) is inserted into the interior of the beam splitter (15).

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