Amplification integrated device for reverse pumping

Abstract

The utility model discloses an amplification integrated device for reverse pumping, and belongs to the technical field of laser. The amplification integrated device comprises a bottom plate and a pump light and indication light driving and transmitting device integrated on the bottom plate, and a pump source chip and an indication light chip are both electrically connected with a circuit control board. The first collimation assembly, the first reflector plate and the second collimation assembly are sequentially arranged on a light path of the pump light, and a first light-transmitting film is arranged on the side face, facing the pump light, of the first reflector plate; the third collimation assembly, the second reflector plate and the fourth collimation assembly are sequentially arranged on the light path of the indicating light, and a second light-transmitting film is arranged on the side face, facing the indicating light, of the second reflector plate; a first reflecting film is arranged on the side face, back to the pump light, of the first reflecting sheet, and a second reflecting film is arranged on the side face, back to the indicating light, of the second reflecting sheet. According to the utility model, the signal light formed by reverse amplification of the pump light and the indication light are coupled and output in a spatial light mode, and the laser has the advantages of small size, high integration level, low process difficulty and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber lasers, in particular to an amplification integrated device for backward pumping. Background Art

[0002] For MOPA fiber lasers, in-line devices are still used. However, in-line devices have disadvantages such as many fusion joints, large volume, many process flows, and high losses. At present, the solution is to miniaturize the device, but it is difficult to fundamentally solve problems such as many fusion joints, many process flows, and large volume. In addition, there is a method of coupling by integrating multiple pump light sources, but the integration of circuit boards has not been achieved, and the volume reduction is limited. Content of the Utility Model

[0003] The purpose of the utility model is to provide an amplification integrated device for backward pumping in view of the existing technical status. The signal light formed by backward amplification of pump light and the indicating light are coupled and output in the mode of spatial light, which has the advantages of small volume, high integration degree, and low process difficulty.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An amplification integrated device for backward pumping includes a bottom plate, and a circuit control board, a pump source chip, a first collimation component, a first reflector, a second collimation component, an indicating light chip, a third collimation component, a second reflector, and a fourth collimation component that are fixed on the bottom plate in a patch form;

[0006] The pump source chip is electrically connected to the circuit control board. The circuit control board is used to control the output of the pump source chip. The output light of the pump source chip is pump light. The first collimation component, the first reflector, and the second collimation component are arranged in sequence on the optical path of the pump light. A first light-transmitting film is provided on the side of the first reflector facing the pump light, and the first light-transmitting film is adapted to the wavelength of the pump light. The first collimation component is used to adjust the collimation of the pump light output by the pump source chip. The first reflector is used to transmit the pump light collimated by the first collimation component. The second collimation component is used to collimate the pump light transmitted by the first reflector and couple it to an external input optical fiber;

[0007] The indicating optical chip is electrically connected to the circuit control board, and the circuit control board is further configured to control the output of the indicating optical chip. The output light of the indicating optical chip is the indicating light. The third collimating component, the second reflector, and the fourth collimating component are arranged in sequence on the optical path of the indicating light. A second light-transmitting film is provided on the side of the second reflector facing the indicating light, and the second light-transmitting film is adapted to the wavelength of the indicating light. The third collimating component is used to adjust the collimation degree of the indicating light output by the indicating optical chip. The second reflector is used to transmit the indicating light collimated by the third collimating component. The fourth collimating component is used to collimate the indicating light transmitted by the second reflector and couple it to the external output optical fiber;

[0008] The return light of the input optical fiber is the signal light. A first reflecting film is provided on the side of the first reflector facing away from the pump light, and the first reflecting film is adapted to the wavelength of the signal light. A second reflecting film is provided on the side of the second reflector facing away from the indicating light, and the second reflecting film is adapted to the wavelength of the signal light. The second collimating component is further used to collimate the signal light. The first reflector is further used to reflect the signal light collimated by the second collimating component to the second reflector, and the first reflector is arranged at 45° to the signal light. The second reflector is further used to reflect the signal light reflected by the first reflector to the fourth collimating component, and the second reflector is arranged at 45° to the signal light. The fourth collimating component is further used to collimate the signal light reflected by the second reflector and couple it to the external output optical fiber.

[0009] Further, an isolator is provided on the optical path of the signal light between the first reflector and the second reflector. The isolator is fixed to the bottom plate in the form of a patch, and it is adapted to the wavelength of the signal light. The isolator is used to isolate non-signal light.

[0010] Further, a first filter is provided on the optical path of the signal light between the isolator and the first reflector. The first filter is fixed to the bottom plate in the form of a patch, and it is adapted to the wavelength of the signal light. The first filter is used to filter non-signal light.

[0011] Further, a second filter is provided on the optical path of the indicating light between the second reflector and the third collimating component. The second filter is fixed to the bottom plate in the form of a patch, and it is adapted to the wavelength of the indicating light. The second filter is used to filter non-indicating light.

[0012] Further, the first collimating component includes a fast-axis collimating mirror and a slow-axis collimating mirror arranged in sequence along the optical path of the pump light.

[0013] Further, the second collimating component, the third collimating component, and the fourth collimating component are all aspherical lenses.

[0014] Further, the wavelengths of the pump light include 915 nm, 940 nm, 976 nm, and 980 nm.

[0015] Further, the indication light includes red light, green light, and yellow light.

[0016] Further, the wavelength of the indication light includes 650 nm.

[0017] The beneficial effects of the present utility model are as follows:

[0018] The present utility model provides an amplification integrated device for backward pumping, which integrates the driving and transmission devices of pump light and indication light on a bottom plate, and designs the optical paths of the two in a correlated manner to form a MOPA optical amplification device. Thus, the signal light formed by backward amplifying the pump light and the indication light are coupled and output in the mode of spatial light, having the advantages of small volume, high integration degree, and low process difficulty. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram (one layout mode) of an amplification integrated device for backward pumping according to the present utility model;

[0020] Figure 2 It is a schematic structural diagram (another layout mode) of an amplification integrated device for backward pumping according to the present utility model;

[0021] Figure 3 It is a schematic structural diagram (yet another layout mode) of an amplification integrated device for backward pumping according to the present utility model.

[0022] Annotation description: 1. Bottom plate, 2. Circuit control board, 3. Pump source chip, 4. First collimation component, 5. First reflector, 6. Second collimation component, 7. Input optical fiber, 8. Indication light chip, 9. Third collimation component, 10. Second filter, 11. Second reflector, 12. Fourth collimation component, 13. Output optical fiber. Detailed Embodiments

[0023] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific examples described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Please refer to Figure 1 As shown, an amplification integrated device for backward pumping includes a bottom plate 1 and a circuit control board 2, a pump source chip 3, a first collimation component 4, a first reflector 5, a second collimation component 6, an indication light chip 8, a third collimation component 9, a second reflector 11, and a fourth collimation component 12 that are fixed on the bottom plate 1 in a patch form.

[0025] The pump source chip 3 is electrically connected to the circuit control board 2, and the circuit control board 2 is used to control the output of the pump source chip 3. The output light of the pump source chip 3 is pump light. In this embodiment, the wavelengths of the pump light include, but are not limited to, 915 nm, 940 nm, 976 nm, and 980 nm.

[0026] The first collimation component 4, the first reflector 5, and the second collimation component 6 are arranged in sequence on the optical path of the pump light. A first light-transmitting film is provided on the side of the first reflector 5 facing the pump light, and the first light-transmitting film is adapted to the wavelength of the pump light. In this embodiment, the first collimation component 4 includes a fast-axis collimating mirror (FAC) and a slow-axis collimating mirror (SAC) arranged in sequence along the optical path of the pump light. The first light-transmitting film has high transmittance for the pump light, and the transmittance is ≥99.5%. The second collimation component 6 is an aspheric mirror.

[0027] Specifically, in this amplification integrated device, the pump source chip 3 outputs pump light. The first collimation component 4 adjusts the collimation degree of the pump light output by the pump source chip 3. The first reflector 5 transmits the collimated pump light by the first collimation component 4. The second collimation component 6 collimates the pump light transmitted by the first reflector 5 and couples it to the external input optical fiber 7. The external input optical fiber 7 is connected to the amplification system, and after the pump light is amplified, it returns to the input optical fiber 7.

[0028] The indicating light chip 8 is electrically connected to the circuit control board 2, and the circuit control board 2 is also used to control the output of the indicating light chip 8. The output light of the indicating light chip 8 is indicating light. In this embodiment, the indicating light includes red light, green light, and yellow light, and the wavelength of the indicating light includes 650 nm.

[0029] The third collimation component 9, the second reflector 11, and the fourth collimation component 12 are arranged in sequence on the optical path of the indicating light. A second light-transmitting film is provided on the side of the second reflector 11 facing the indicating light, and the second light-transmitting film is adapted to the wavelength of the indicating light. In this embodiment, both the third collimation component 9 and the fourth collimation component 12 are aspheric mirrors. The second light-transmitting film has high transmittance for the indicating light, and the transmittance is ≥99.5%.

[0030] Specifically, in this amplification integrated device, the indicating light chip 8 outputs indicating light. The third collimation component 9 adjusts the collimation degree of the indicating light output by the indicating light chip 8. The second reflector 11 transmits the collimated indicating light by the third collimation component 9. The fourth collimation component 12 collimates the indicating light transmitted by the second reflector 11 and couples it to the external output optical fiber 13.

[0031] The return light of the input optical fiber 7 is signal light. In this embodiment, the wavelengths of the signal light include 1064 nm and 1550 nm.

[0032] On the side of the first reflector 5 facing away from the pump light, a first reflective film is provided, and the first reflective film is adapted to the wavelength of the signal light. On the side of the second reflector 11 facing away from the indication light, a second reflective film is provided, and the second reflective film is adapted to the wavelength of the signal light. In this embodiment, both the first reflective film and the second reflective film have high reflectivity for the signal light, and the reflectivity ≥ 99.5%.

[0033] Specifically, in this amplification integrated device, the second collimation component 6 collimates the signal light. The first reflector 5 reflects the signal light collimated by the second collimation component 6 to the second reflector 11, and the first reflector is arranged at 45° with respect to the signal light. The second reflector 11 reflects the signal light reflected by the first reflector 5 to the fourth collimation component 12, and the second reflector 11 is arranged at 45° with respect to the signal light. The fourth collimation component 12 collimates the signal light reflected by the second reflector 11 and couples it to the external output optical fiber 13.

[0034] In the above technical solution, the following is the preferred design:

[0035] An isolator 15 is provided on the optical path of the signal light between the first reflector 5 and the second reflector 11. The isolator 15 is fixed to the bottom plate 1 in the form of a patch, and it is adapted to the wavelength of the signal light. The isolator 15 is used to isolate non-signal light;

[0036] A first filter 14 is provided on the optical path of the signal light between the isolator 15 and the first reflector 5. The first filter 14 is fixed to the bottom plate 1 in the form of a patch, and it is adapted to the wavelength of the signal light. The first filter 14 is used to filter non-signal light;

[0037] A second filter 10 is provided on the optical path of the indication light between the second reflector 11 and the third collimation component 9. The second filter 10 is fixed to the bottom plate 1 in the form of a patch, and it is adapted to the wavelength of the indication light. The second filter 10 is used to filter non-indication light.

[0038] In addition, please refer to Figures 1 to 3 As shown, on the basis of the above technical solution, there are three different layout modes in this amplification integrated device:

[0039] In one layout mode, the bottom plate 1 is of a rectangular structure, and the external input optical fiber 7 and output optical fiber 13 are spatially optically coupled to this amplification integrated device from the same side of the bottom plate 1;

[0040] In another layout mode, the bottom plate 1 is of a rectangular structure, and the external input optical fiber 7 and output optical fiber 13 are spatially optically coupled to this amplification integrated device from the opposite sides of the bottom plate 1, and the external input optical fiber 7 and output optical fiber 13 are aligned;

[0041] In another layout mode, the bottom plate 1 is of a rectangular structure, and the external input optical fiber 7 and output optical fiber 13 are spatially optically coupled to the amplification integrated device from the same side of the bottom plate 1, and the external input optical fiber 7 and output optical fiber 13 are misaligned.

[0042] Generally speaking, the utility model integrates the driving and transmission devices of the pump light and the indicating light on the bottom plate 1, and designs the optical paths of the two in an associated manner to form a MOPA optical amplification device. Thus, the signal light formed by the reverse amplification of the pump light and the indicating light are coupled and output through the mode of spatial light, which has the advantages of small volume, high integration degree, low process difficulty, etc.

[0043] The utility model is not limited to the above specific embodiments. Those of ordinary skill in the art can implement the utility model in many other specific embodiments according to the content disclosed in the utility model. Therefore, any design that adopts the design structure and idea of the utility model and makes some simple changes or modifications falls within the protection scope of the utility model.

Claims

1. An integrated amplifier device for reverse pumping, characterized in that: It includes a base plate and a circuit control board fixed on the base plate in the form of a patch, a pump source chip, a first collimation component, a first reflector, a second collimation component, an indicator light chip, a third collimation component, a second reflector, and a fourth collimation component; The pump source chip is electrically connected to the circuit control board. The circuit control board is used to control the output of the pump source chip. The output light of the pump source chip is the pump light. The first collimating component, the first reflector, and the second collimating component are sequentially arranged on the optical path of the pump light. A first light-transmitting film is provided on the side of the first reflector facing the pump light, and the first light-transmitting film is adapted to the wavelength of the pump light. The first collimating component is used to adjust the collimation of the pump light output by the pump source chip. The first reflector is used to transmit the pump light collimated by the first collimating component. The second collimating component is used to collimate the pump light transmitted by the first reflector and couple it to an external input optical fiber. The indicator light chip is electrically connected to the circuit control board, and the circuit control board is also used to control the output of the indicator light chip. The output light of the indicator light chip is the indicator light. The third collimating component, the second reflector and the fourth collimating component are sequentially arranged on the optical path of the indicator light. A second light-transmitting film is provided on the side of the second reflector facing the indicator light, and the second light-transmitting film is adapted to the wavelength of the indicator light. The third collimating component is used to adjust the collimation of the indicator light output by the indicator light chip. The second reflector is used to transmit the indicator light collimated by the third collimating component. The fourth collimating component is used to collimate the indicator light transmitted by the second reflector and couple it to an external output optical fiber. The return light of the input optical fiber is the signal light. A first reflective film is provided on the side of the first reflector facing away from the pump light, and the first reflective film is adapted to the wavelength of the signal light. A second reflective film is provided on the side of the second reflector facing away from the indicator light, and the second reflective film is adapted to the wavelength of the signal light. The second collimating component is also used to collimate the signal light. The first reflector is also used to reflect the signal light collimated by the second collimating component to the second reflector, and the first reflector is arranged at 45° to the signal light. The second reflector is also used to reflect the signal light reflected by the first reflector to the fourth collimating component, and the second reflector is arranged at 45° to the signal light. The fourth collimating component is also used to collimate the signal light reflected by the second reflector and couple it to the external output optical fiber.

2. The reverse pumping integrated amplifier device according to claim 1, characterized in that: An isolator is provided on the optical path of the signal light between the first reflector and the second reflector. The isolator is fixed on the bottom plate in the form of a patch and is adapted to the wavelength of the signal light. The isolator is used to isolate non-signal light.

3. The reverse pumping integrated amplifier device according to claim 2, characterized in that: A first filter is provided on the optical path of the signal light between the isolator and the first reflector. The first filter is fixed on the bottom plate in the form of a patch and is adapted to the wavelength of the signal light. The first filter is used to filter out non-signal light.

4. The reverse pumping integrated amplifier device according to claim 1, characterized in that: A second filter is provided on the optical path of the indicator light between the second reflector and the third collimating assembly. The second filter is fixed on the bottom plate in the form of a patch and is adapted to the wavelength of the indicator light. The second filter is used to filter out non-indicator light.

5. The reverse pumping integrated amplifier device according to claim 1, characterized in that: The first collimating component comprises a fast-axis collimating mirror and a slow-axis collimating mirror which are sequentially arranged along the optical path of the pump light.

6. The reverse pumping integrated amplifier device according to claim 1, characterized in that: The second collimating component, the third collimating component and the fourth collimating component are all aspherical lenses.

7. The reverse pumping integrated amplifier device according to claim 1, characterized in that: The wavelengths of the pump light include 915 nm, 940 nm, 976 nm, and 980 nm.

8. The reverse pumping integrated amplifier device according to claim 1, characterized in that: The indicator light includes red light, green light and yellow light.

9. The integrated amplifier device for reverse pumping according to claim 8, characterized in that: The wavelength of the indicator light includes 650 nm.

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