Integrated pump laser, system and integrated pump laser device

Abstract

The present invention relates to the field of pump lasers, and specifically to an integrated pump laser, which includes an input end, an isolator, a pump laser source, a wavelength divider and an output end, wherein the input end, the isolator, the wavelength divider and the output end are arranged in sequence, the pump laser source emits a pump laser and is incident into the wavelength divider, the input end is connected to an external input optical fiber, and the output end is connected to an external output optical fiber. The present invention also relates to an integrated pump laser system and an integrated pump laser device. The invention integrates an isolator, a wavelength divider and a pump laser by designing an integrated pump laser, a system and an integrated pump laser device, and is mainly used in a fiber amplifier, which can realize the miniaturization of the amplifier, improve the integration and reduce the cost; at the same time, it improves the stability and installation convenience of the fiber amplifier based on the pump laser.

Description

Technical Field

[0001] The present invention relates to the field of pump lasers, and in particular to an integrated pump laser, a system and an integrated pump laser device. Background Art

[0002] In a laser, external energy is usually input into the gain medium that generates the laser in the form of light or electric current, which excites electrons in the ground state to a higher energy level (people use the word "pumping" to describe this process (like pumping water from a low place to a high place)). Physicists call this state an excited state.

[0003] Currently, 980-nanometer and 1480-nanometer pump lasers are mainly used in fiber amplifiers. Their function is to pump rare-earth-doped optical fibers to produce particle energy level inversion, ultimately amplifying the signal light.

[0004] When realizing the function of the optical fiber amplifier, it is necessary to combine the pump laser with the external lens structure to complete the amplification function. The input optical signal needs to pass through the external isolator and then pass into the external wavelength splitter. The pump laser emitted by the pump laser is combined with the optical signal on the external wavelength splitter and then emitted.

[0005] However, the above structure is complex and requires additional lenses to complete the overall light path transmission, which is not conducive to integrated design. Summary of the invention

[0006] The technical problem to be solved by the invention is to provide an integrated pump laser to achieve miniaturization, improve integration and reduce costs in view of the above-mentioned defects of the prior art.

[0007] The technical problem to be solved by the invention is to provide an integrated pump laser system to achieve miniaturization, improve integration and reduce costs in view of the above-mentioned defects of the prior art.

[0008] The technical problem to be solved by the invention is to provide an integrated pump laser device to achieve miniaturization, improve integration and reduce costs in view of the above-mentioned defects of the prior art.

[0009] The invention solves the technical problem by adopting a technical solution: providing an integrated pump laser, which includes an input end, an isolator, a pump laser source, a wavelength divider and an output end, wherein the input end, the isolator, the wavelength divider and the output end are arranged in sequence, the pump laser source emits a pump laser and is incident into the wavelength divider, the input end is connected to an external input optical fiber, and the output end is connected to an external output optical fiber; wherein,

[0010] The external optical signal is incident on the wavelength splitter through the input end and the isolator in sequence. The wavelength splitter couples the incident optical signal and the pump laser into a beam and then emits it from the output end.

[0011] Among them, a preferred solution is: the integrated pump laser also includes a reflector, and the reflector is arranged between the isolator and the wavelength divider, and the optical signal passes through the isolator and the reflector and is incident on the wavelength divider.

[0012] The technical solution adopted by the invention to solve the technical problem is: to provide an integrated pump laser system, the integrated pump laser system comprising:

[0013] The integrated pump laser as claimed in claim 1 or 2;

[0014] An input optical fiber, which is connected to an input end of the integrated pump laser and injects an optical signal from the input end into the integrated pump laser;

[0015] The output optical fiber is connected to the output end of the integrated pump laser, and the coupled optical signal and the pump laser emitted from the input end are incident on the output optical fiber.

[0016] The invention solves the technical problem by adopting a technical solution: providing an integrated pump laser device, which includes a housing, an isolator, a pump laser source and a wavelength splitter arranged in the housing, the housing including an input end and an output end, the input end is connected to an external input optical fiber, and the output end is connected to an external output optical fiber; wherein,

[0017] The external optical signal is incident into the wavelength splitter through the input end and the isolator in turn. The pump laser source emits pump laser and is incident into the wavelength splitter. The wavelength splitter couples the incident optical signal and the pump laser into a beam and emits it from the output end.

[0018] Among them, a preferred solution is that the input end and the output end are both arranged on one side of the shell, the integrated pump laser device also includes a reflector arranged between the isolator and the wavelength divider, and the optical signal is incident on the wavelength divider through the isolator and the reflector.

[0019] Among them, a preferred solution is: a protective cover is arranged outside the input end and the output end, and the input optical fiber and the output optical fiber are both arranged in the protective cover.

[0020] Among them, a preferred solution is: the integrated pump laser device also includes a pin pin, one end of the pin pin is extended out of the shell, and the other end of the pin pin is connected to the pump laser source.

[0021] Among them, a preferred solution is: the pin pin includes a power pin pin and a control transmission pin pin, the power pin pin supplies power to the pump laser source, and the control transmission pin pin controls the output of the pump laser source.

[0022] Among them, a preferred solution is: 7 pin pins extend outward from the top ends of two opposite sides of the shell respectively, and the pin pins are arranged in parallel.

[0023] Among them, a preferred solution is: the shell also includes a fixing plate arranged on the bottom surface, the fixing plate is extended to both sides along the bottom surface, and the fixing plate includes a fixing hole.

[0024] The beneficial effect of the invention is that, compared with the prior art, the invention integrates the isolator, the wavelength splitter and the pump laser by designing an integrated pump laser, a system and an integrated pump laser device, which are mainly used for optical fiber amplifiers, can realize the miniaturization of the amplifier, improve the integration level and reduce the cost; at the same time, the stability and installation convenience of the optical fiber amplifier based on the pump laser are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0026] Figure 1 It is a schematic diagram of the overall structure of the integrated pump laser of the present invention;

[0027] Figure 2 It is a schematic diagram of the specific structure of the integrated pump laser of the present invention;

[0028] Figure 3 It is a partial cross-sectional structural schematic diagram of an integrated pump laser device with a protective cover according to the present invention;

[0029] Figure 4 It is a partial cross-sectional structural schematic diagram of the integrated pump laser device of the present invention;

[0030] Figure 5 It is a schematic diagram of the side structure of the integrated pump laser device of the present invention. DETAILED DESCRIPTION

[0031] Now, in conjunction with the accompanying drawings, the preferred embodiments of the invention will be described in detail.

[0032] like Figure 1 and Figure 2 As shown, the present invention provides a preferred embodiment of an integrated pump laser.

[0033] An integrated pump laser 10 comprises an input end, an isolator 12, a pump laser source 11, a wavelength divider 13 and an output end, wherein the input end, the isolator 12, the wavelength divider 13 and the output end are arranged in sequence, the pump laser source 11 emits a pump laser and injects it into the wavelength divider 13, the input end is connected to an external input optical fiber 21, and the output end is connected to an external output optical fiber 22; wherein an external optical signal is injected into the wavelength divider 13 through the input end and the isolator 12 in sequence, and the wavelength divider 13 couples and combines the incident optical signal and the pump laser, and then emits them from the output end.

[0034] Specifically, the external optical signal is incident on the integrated pump laser 10 through the input optical fiber 21, and enters the wavelength divider 13 through the isolator 12. The isolator 12 prevents the reflected light in the optical path from interfering with the signal light; at the same time, the pump laser source 11 emits the pump laser and is incident on the wavelength divider 13. The wavelength divider 13 is also a wavelength division multiplexer, which is an optical device that combines a series of optical signals carrying information but with different wavelengths into a beam and transmits them along a single optical fiber; the wavelength divider 13 injects the combined optical signal and the pump laser from the input end into the output optical fiber 22 to achieve optical amplification, that is, optical power amplification.

[0035] The input optical fiber 21 and the output optical fiber 22 are both rare earth-doped optical fibers.

[0036] Furthermore, the integrated pump laser 10 further includes a reflector 14, which is disposed between the isolator 12 and the wavelength splitter 13. The optical signal passes through the isolator 12 and the reflector 14 and is incident into the wavelength splitter 13. The arrangement of the reflector 14 improves the overall compatibility and reduces the occupied space.

[0037] In the present embodiment, an integrated pump laser system is further provided, which includes an integrated pump laser 10, an input optical fiber 21 and an output optical fiber 22; wherein the input optical fiber 21 is connected to the input end of the integrated pump laser 10, and the optical signal is incident from the input end into the integrated pump laser 10; the output optical fiber 22 is connected to the output end of the integrated pump laser 10, and the coupled optical signal and the pump laser emitted from the input end are incident into the output optical fiber 22.

[0038] like Figures 1 to 5 As shown, the present invention provides a preferred embodiment of an integrated pump laser device.

[0039] An integrated pump laser device includes a housing 101, an isolator 12, a pump laser source 11 and a wavelength divider 13 arranged in the housing 101, the housing 101 includes an input end and an output end, the input end is connected to an external input optical fiber 21, and the output end is connected to an external output optical fiber 22; wherein an external optical signal is incident into the wavelength divider 13 through the input end and the isolator 12 in sequence, the pump laser source 11 emits a pump laser and is incident into the wavelength divider 13, and the wavelength divider 13 couples and combines the incident optical signal and the pump laser and emits them from the output end.

[0040] Specifically, the shell 101 includes a cavity, the isolator 12, the pump laser source 11 and the wavelength splitter 13 are all arranged in the cavity, and the shell 101 also includes an optical fiber interface connected to the cavity, and the shell 101 is connected to the external optical fiber through the optical fiber interface; the cavity includes a first cavity, a second cavity and a third cavity, the isolator 12 is arranged on the first cavity and fixed by gluing or clamping, and the first cavity is arranged at the optical fiber interface of the input optical fiber 21; the pump laser source 11 is arranged in the second cavity and faces the third cavity; the wavelength splitter 13 is arranged on the third cavity and fixed by gluing or clamping, and the third cavity is arranged at the optical fiber interface of the output optical fiber 22.

[0041] In this embodiment, the input end and the output end are both arranged on one side of the housing 101 . The integrated pump laser device further includes a reflector 14 arranged between the isolator 12 and the wavelength divider 13 . The optical signal passes through the isolator 12 and the reflector 14 and is incident on the wavelength divider 13 .

[0042] That is, the first cavity and the third cavity are arranged in parallel to improve the compactness of the overall space.

[0043] Among them, and refer to Figure 4 A protective cover 104 is disposed outside the input end and the output end, and the input optical fiber 21 and the output optical fiber 22 are both disposed inside the protective cover 104 .

[0044] In this embodiment, the integrated pump laser device further includes a pin pin 102, one end of the pin pin 102 extends out of the housing 101, and the other end of the pin pin 102 is connected to the pump laser source 11. Further, the pin pin 102 includes a power pin pin 102 and a control transmission pin pin 102, the power pin pin 102 supplies power to the pump laser source 11, and the control transmission pin pin 102 controls the output of the pump laser source 11. Preferably, 7 pin pins 102 extend outward from the top ends of the two opposite sides of the housing 101, and the pin pins 102 are arranged in parallel.

[0045] In this embodiment, the housing 101 further includes a fixing plate 103 disposed on the bottom surface. The fixing plate 103 extends toward both sides along the bottom surface. The fixing plate 103 includes fixing holes 1031 .

[0046] The integrated pump laser device is installed and fixed by the fixing plate 103 , thereby improving the optical path transmission stability of the overall integrated pump laser device.

[0047] The above is only the best embodiment of the invention and is not intended to limit the scope of the invention. All equivalent changes or modifications made within the scope of the invention patent application are covered by the invention.

Claims

1. An integrated pump laser, characterized in that: The integrated pump laser comprises an input end, an isolator, a pump laser source, a wavelength divider and an output end, wherein the input end, the isolator, the wavelength divider and the output end are arranged in sequence, the pump laser source emits a pump laser and injects it into the wavelength divider, the input end is connected to an external input optical fiber, and the output end is connected to an external output optical fiber; wherein, The external optical signal is incident into the wavelength splitter through the input end and the isolator in turn. The wavelength splitter couples the incident optical signal and the pump laser into a beam and then emits it from the output end. It also includes a reflector, which is arranged between the isolator and the wavelength splitter. The optical signal passes through the isolator and the reflector and is incident on the wavelength splitter.

2. An integrated pump laser system, characterized in that: The integrated pump laser system includes: The integrated pump laser as claimed in claim 1; An input optical fiber, which is connected to an input end of the integrated pump laser and injects an optical signal from the input end into the integrated pump laser; The output optical fiber is connected to the output end of the integrated pump laser, and the coupled optical signal and the pump laser emitted from the input end are incident on the output optical fiber.

3. An integrated pump laser device, characterized in that: The integrated pump laser device comprises a housing, and an isolator, a pump laser source and a wavelength splitter arranged in the housing. The housing comprises an input end and an output end. The input end is connected to an external input optical fiber, and the output end is connected to an external output optical fiber. The external optical signal is incident into the wavelength splitter through the input end and the isolator in sequence. The pump laser source emits the pump laser and is incident into the wavelength splitter. The wavelength splitter couples the incident optical signal and the pump laser into a beam and then emits it from the output end. The input end and the output end are both arranged on one side of the shell. The integrated pump laser device also includes a reflector arranged between the isolator and the wavelength divider. The optical signal passes through the isolator and the reflector and is incident into the wavelength divider.

4. The integrated pump laser device according to claim 3, characterized in that: A protective cover is arranged outside the input end and the output end, and the input optical fiber and the output optical fiber are both arranged inside the protective cover.

5. The integrated pump laser device according to claim 3, characterized in that: The integrated pump laser device also includes a pin pin, one end of which extends out of the housing, and the other end of which is connected to a pump laser source.

6. The integrated pump laser device according to claim 5, characterized in that: The pin pins include a power pin pin and a control transmission pin pin, the power pin pin supplies power to the pump laser source, and the control transmission pin pin controls the output of the pump laser source.

7. The integrated pump laser device according to claim 5, characterized in that: Seven pins extend outward from the top ends of two opposite sides of the housing, and the pins are arranged in parallel.

8. The integrated pump laser device according to claim 3, characterized in that: The housing also includes a fixing plate arranged on the bottom surface, the fixing plate is extended along the bottom surface to both sides, and the fixing plate includes a fixing hole.

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