CN217281616U - Semiconductor optical fiber coupling module, optical fiber laser amplification system and pulse optical fiber laser - Google Patents

Abstract

The utility model relates to an integrate the fiber device field, provide a semiconductor fiber coupling module, optic fibre laser amplification system and fiber laser, wherein, semiconductor fiber coupling module includes: the device comprises a shell, an input optical fiber and an output optical fiber which are arranged on two opposite sides of the shell, and a first collimating lens, a first dichroic mirror, a second dichroic mirror and a second collimating lens which are contained in the shell and are sequentially arranged along an incident optical axis of the signal light of the previous stage; the pump module is fixed on the mounting table on the bottom plate of the shell, and is accommodated in the shell, at least one reverse pumping module and at least one forward pumping module are arranged in the shell, the reverse pumping module and the forward pumping module are fixed on the back of the mounting table away from the side face of the bottom plate, the reverse pumping module transmits pumping light to pass through the first collimating lens after passing through the first dichroic mirror and then output from the input optical fiber, the forward pumping module transmits pumping light to pass through the second dichroic mirror and then output from the output optical fiber, and the integration of the pumping modules is realized through spatial coupling, so that a beam combiner is omitted, welding points are reduced, and the quality of light beams is improved.

Description

Semiconductor optical fiber coupling module, optical fiber laser amplification system and pulse optical fiber laser

Technical Field

The utility model relates to an optical fiber device integrates, concretely relates to semiconductor fiber coupling module, optic fibre laser amplification system and pulse fiber laser ware.

Background

The fiber laser has the characteristics of good heat dissipation, compact system structure, high beam quality and the like, and is widely applied to the fields of industrial processing, medical treatment and health, scientific research and the like in recent years. The most space light path structures that adopt of early fiber laser, there are coupling light path complicacy, the poor stability problem, when realizing fiber amplifier's function, need make up pump laser with outside lens structure, accomplish the amplification function, this kind of laser amplification structure is complicated, need additionally to increase the transmission that whole light path was accomplished to the lens, be unfavorable for integrating the design, and because these fiber laser amplification device integrated level is low, at the whole light path of fiber laser build-up in-process, need carry out the butt fusion with a plurality of independent optical devices, the splice point is more, be unfavorable for the improvement of beam quality.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a collect pumping source, close beam ware function in semiconductor fiber coupling module of an organic whole realizes small-size integrating, promotes advantages such as compact structure nature, the stability of performance, convenient to use of optic fibre laser amplification system and pulse fiber laser and guarantees the beam quality of output laser.

In order to solve the above technical problem, in a first aspect, the utility model provides a semiconductor fiber coupling module, include: the device comprises a shell, an input optical fiber and an output optical fiber which are arranged on two opposite sides of the shell, and a first collimating lens, a first dichroic mirror, a second dichroic mirror and a second collimating lens which are contained in the shell and are sequentially arranged along an incident optical axis of the signal light of the previous stage; the device comprises a mounting table fixed on a bottom plate of the shell, and at least one reverse pumping module and at least one forward pumping module contained in the shell, wherein the reverse pumping module and the forward pumping module are fixed on the side surface of the mounting table away from the bottom plate, the reverse pumping module emits pumping light which passes through a first dichroic mirror and then passes through a first collimating lens to be output from the input optical fiber, and the forward pumping module emits pumping light which passes through a second dichroic mirror and then passes through a second collimating lens to be output from the output optical fiber.

In some embodiments, the backward pumping module and the forward pumping module are respectively disposed at two sides along the incident optical axis of the previous-stage signal light, or the backward pumping module and the forward pumping module are both disposed at the same side along the incident optical axis of the previous-stage signal light.

In some embodiments, the housing is provided with one reverse pumping module and three forward pumping modules, the mounting platform is stepped, so that the three forward pumping modules are sequentially arranged on the mounting platform in a height difference manner, and the stepped mounting platform is the lowest in height on the side close to the incident optical axis of the previous-stage signal light.

In some embodiments, the backward pumping module comprises a first pumping laser chip, a first shaping lens and a first reflector, the forward pumping module comprises a second pumping laser chip, a second shaping lens and a second reflector, the pumping light emitted by the first pumping laser chip sequentially passes through the first shaping lens, the first reflector, the first dichroic mirror, the first collimating lens and the input optical fiber, and the pumping light emitted by the second pumping laser chip sequentially passes through the second shaping lens, the second reflector, the second dichroic mirror, the second collimating lens and the output optical fiber.

In some embodiments, a heat sink is attached between each of the first and second pump laser chips and the mounting stage.

In some embodiments, the first shaping lens and the first collimating lens are each plated with a high-transmittance film layer matching the wavelength of the pump light emitted by the first pump laser chip, and the first mirror and the first dichroic mirror are each plated with a high-reflectance film layer matching the wavelength of the pump light emitted by the first pump laser chip; the second shaping lens and the second collimating lens are plated with high-transmittance film layers matched with the wavelength of the pump light emitted by the second pump laser chip, and the second reflector and the second dichroic mirror are plated with high-reflection film layers matched with the wavelength of the pump light emitted by the second pump laser chip; and the first collimating lens, the second collimating lens, the first dichroic mirror and the second dichroic mirror are all plated with high-transmittance film layers matched with the wavelength of the last-stage signal light emitted from the input optical fiber.

In some embodiments, the first pump laser chip emits pump light with a wavelength of 915nm or 976nm, the second pump laser chip emits pump light with a wavelength of 915nm or 976nm, and the wavelength of the last-stage signal light incident from the input optical fiber is 1064 nm.

In some embodiments, a first protective sheath and a second protective sheath are respectively disposed on two opposite sides of the housing, one end of the input optical fiber is accommodated in the first protective sheath, and one end of the output optical fiber is accommodated in the second protective sheath; at least one group of power supply pins are arranged on the shell, and the power supply pins are respectively and electrically connected with the forward pumping module and the backward pumping module; the input optical fiber and the output optical fiber are respectively any one of a single-clad optical fiber, a multi-clad optical fiber, a polarization maintaining optical fiber, a tapered optical fiber, an active optical fiber or a photonic crystal optical fiber.

In addition, in order to solve the above problem, in a second aspect, the present invention provides an optical fiber laser amplifying system, including the above semiconductor optical fiber coupling module.

Furthermore, for solving the above problem, the third aspect provides a pulse fiber laser, including above-mentioned semiconductor fiber coupling module.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a semiconductor fiber coupling module, include: the device comprises a shell, an input optical fiber and an output optical fiber which are arranged on two opposite sides of the shell, and a first collimating lens, a first dichroic mirror, a second dichroic mirror and a second collimating lens which are contained in the shell and are sequentially arranged along an incident optical axis of the signal light of the previous stage; the pump module is fixed on a mounting table on a bottom plate of the shell, and is accommodated in the shell, at least one reverse pumping module and at least one forward pumping module are arranged in the shell, the reverse pumping module and the forward pumping module are fixed on the side face of the mounting table, which is away from the bottom plate, the reverse pumping module transmits pumping light to pass through the first dichroic mirror and then pass through the first collimating lens to be output from the input optical fiber, the forward pumping module transmits pumping light to pass through the second dichroic mirror and then pass through the second collimating lens to be output from the output optical fiber, and the integration of the pumping modules is realized through space coupling, so that a beam combiner is omitted, welding points are reduced, and the quality of light beams is improved.

Heat sinks are attached between the first pump laser chip and the mounting platform and between the second pump laser chip and the mounting platform, so that the heat dissipation efficiency of the forward pump module and the reverse pump module is improved, and the use safety of the semiconductor optical fiber coupling module is further guaranteed.

The semiconductor optical fiber coupling module is characterized in that a first protective sleeve and a second protective sleeve are respectively arranged on two opposite sides of the shell, one end of the input optical fiber is contained in the first protective sleeve, and one end of the output optical fiber is contained in the second protective sleeve, so that the semiconductor optical fiber coupling module is beneficial to plugging and unplugging of the output optical fiber and the output optical fiber when being applied to an optical fiber laser amplification system and an optical fiber laser, and manual operation is facilitated.

Furthermore, because will the utility model provides a semiconductor fiber coupling module uses in optic fibre laser amplification system and pulse fiber laser, only needs to be connected with input fiber and output fiber respectively, and the installation is simpler, does benefit to the equipment of fiber laser high integration.

Drawings

One or more embodiments are illustrated in respective figures that are not intended to be limiting, in which like reference numerals refer to similar elements, unless otherwise specified, and in which the figures are not intended to be limiting in scale.

FIG. 1 is a schematic diagram of a prior art amplification system for fiber laser optical path architecture;

fig. 2 is a schematic diagram of optical path transmission of a semiconductor fiber coupling module provided in this embodiment;

fig. 3 is a perspective structural view of a semiconductor optical fiber coupling module provided in this embodiment;

fig. 4 is a schematic diagram of a specific optical path transmission of the semiconductor fiber coupling module provided in this embodiment.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "disposed on"/"secured to"/"disposed on" another element, it can be directly on the other element or intervening elements may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In addition, in this specification, the words "first" and "second" do not limit data and execution order, and are used to distinguish between substantially the same or similar items in function and action, and are not limited in the embodiments of the present invention. The output and input ends of the present invention refer to both the input and output of signal light (laser), unless otherwise specified, such as input fiber/output fiber. For the convenience of optical device position restriction, the utility model discloses use signal light (laser) incident direction to be forward direction or forward light, and use this incident direction to carry out the position of part for the reference and prescribe a limit to, the utility model discloses use signal light's transmission path as the main light path.

First, referring to fig. 1, fig. 1 is a schematic diagram of a fiber laser amplifier in the prior art, where the fiber laser amplifier includes: a gain fiber P1 for previous stage amplification, a gain fiber P2 for next stage amplification, a reverse beam combiner 1, a first pump source 4/5, a forward beam combiner 3, a second pump source 6/7, wherein an output end of the gain fiber P1 for previous stage amplification is connected with an input end of the reverse beam combiner 1, an output end of the first pump source 4/5 is connected with a pump input end of the reverse beam combiner 1, an output end of the reverse beam combiner 1 is connected with an input end of the forward beam combiner 3, an output end of the forward beam combiner 3 is connected with the gain fiber P2 for next stage amplification, an output end of the second pump source 6/7 is connected with a pump input end of the forward beam combiner 3, wherein pump light L2 emitted by the first pump source 4/5 is injected into the gain fiber P1 for previous stage amplification through the reverse beam combiner 1, the power gain amplification of the previous-stage fiber laser amplification system is realized, and finally, the signal light L1 is output from the gain fiber P1, and the pump light L3 emitted by the second pump source 6/7 is injected into the gain fiber P2 together with the signal light L1 through the forward beam combiner 3 to perform the power gain amplification of the next-stage fiber laser amplification system. Referring to fig. 1, in the prior art, the gain fiber P1 for the previous stage amplification, the gain fiber P2 for the next stage amplification, the backward beam combiner 1, the first pump source 4/5, the forward beam combiner 3, and the second pump source 6/7 in the fiber laser amplification system all perform transmission of the pump light and the signal light through fiber connection, and the welding points are increased during the process of connecting the independent optical devices through the fiber connection, which all result in increased loss of the signal light and the pump light and poor beam quality.

To solve the defects of the prior art, referring to fig. 2 in combination with fig. 3, the present embodiment provides a semiconductor fiber coupling module 20, which can realize the function of the dashed box portion 10 in fig. 1, i.e. the integration of the beam combiner and the pump source function, further integrate the spatial coupling of the pump light and the signal light, reduce the welding points, and improve the beam quality. The semiconductor optical fiber coupling module 20 provided in the present embodiment includes: the device comprises a shell H, an input optical fiber F1 and an output optical fiber F2 which are arranged on two opposite sides of the shell H, and a first collimating lens 11, a first dichroic mirror 12, a second dichroic mirror 13 and a second collimating lens 14 which are contained in the shell H and are sequentially arranged along the incident optical axis of the upper-stage signal light L1; the optical fiber coupling device comprises a mounting table Q fixed on a bottom plate of the shell, and at least one reverse pumping module 15 and at least one forward pumping module 16 contained in the shell H, wherein the reverse pumping module 15 and the forward pumping module 16 are fixed on the side surface of the mounting table Q away from the bottom plate, the reverse pumping module 15 emits pumping light L2 which passes through the first dichroic mirror 12 and then is output from the input optical fiber F1 through the first collimating lens 11, and the forward pumping module 16 emits pumping light L3 which passes through the second dichroic mirror 13 and then is output from the output optical fiber F2 through the second collimating lens 14.

In an embodiment, the backward pump module 15 and the forward pump module 16 are respectively disposed at two sides along the incident optical axis of the previous-stage signal light L1, and in order to reduce the volume of the semiconductor fiber coupling module 20, in this embodiment, it is preferable that both the backward pump module 15 and the forward pump module 16 are disposed at the same side along the incident optical axis of the previous-stage signal light L1.

In some embodiments, referring to fig. 3 and 4, the semiconductor fiber coupling module 20 may integrate different numbers of the backward pumping modules 15 and the forward pumping modules 16, in this embodiment, the semiconductor fiber coupling module 20 includes one backward pumping module 15 and three forward pumping modules 16, the mounting stage Q is stepped, so that the three forward pumping modules 16 are arranged on the mounting stage Q in a height difference manner, and the height of the stepped mounting stage Q is the lowest on the side close to the incident optical axis of the previous-stage signal light L1, so that the pump light emitted by any one of the forward pumping modules 16 is not blocked by the other forward pumping modules 16.

Meanwhile, it should be noted that, if the semiconductor fiber coupling module 20 in this embodiment is applied to a pulse fiber laser including a Q-switch, the Q-switch is generally disposed in a power amplification optical path structure at a previous stage (or a previous stage) of an optical path system in the pulse fiber laser to avoid burning of the Q-switch, because the Q-switch generally has a smaller power of a signal light, in this embodiment, the number of the reverse pumping modules 15 is one, and according to a laser processing requirement, the power output by the pulse fiber laser cannot be too low, the number of the forward pumping modules 16 is generally selected to be increased, and the semiconductor fiber coupling module 20 in this embodiment, preferably, is applied to a laser-marked pulse fiber laser to meet the laser marking requirement, the addition of too many forward pumping modules 16 not only increases the volume of the housing H, but also increases the difficulty of the process for manufacturing the semiconductor fiber coupling module 20, so that the semiconductor fiber coupling module 20 in this embodiment includes three forward pumping modules 16.

Further, in this embodiment, the backward pumping module 15 includes a first pumping laser chip 151, a first shaping lens 152 and a first reflector 153, the forward pumping module 16 includes a second pumping laser chip 161, a second shaping lens 162 and a second reflector 163, the pumping light L2 emitted by the first pumping laser chip 151 passes through the first shaping lens 152, the first reflector 153, the first dichroic mirror 12, the first collimating lens 11 and the input fiber F1 in sequence, the pumping light L3 emitted by the second pumping laser chip 161 passes through the second shaping lens 162, the second reflector 163, the second dichroic mirror 13, the second collimating lens 14 and the output fiber F2 in sequence, wherein the first shaping lens 152 includes: the first fast axis collimating lens 1521 and the first slow axis collimating lens 1522, the first fast axis collimating lens 1521 is disposed at one end of the first pump laser chip 151, where the pump light L2 is emitted, and the pump light L2 sequentially passes through the first fast axis collimating lens 1521 and the first slow axis collimating lens 1522, so as to optimize the beam quality; the second shaping lens 162 includes a second fast axis collimating lens 1621 and a second slow axis collimating lens 1622, the second fast axis collimating lens 1621 is disposed at one end of the second pump laser chip 161, where the pump light L3 is emitted, and the pump light L3 sequentially passes through the second fast axis collimating lens 1621 and the second slow axis collimating lens 1622.

Since the semiconductor fiber coupling module 20 integrates the backward pumping module 15 and the forward pumping module 16, a large amount of heat is generated during the process of emitting the pumping light, if the heat is not conducted out in time, the semiconductor fiber coupling module 20 is burned under severe conditions, and in order to ensure that the semiconductor fiber coupling module 20 can be used normally, specifically, heat sinks (not shown) are attached between the first pumping laser chip 151 and the mounting platform Q, and between the second pumping laser chip 161 and the mounting platform Q. In this embodiment, the heat sink (not shown) is a material with large thermal conductivity, such as red copper, and preferably a ceramic sheet plated with a copper-gold material.

In order to reduce the loss of the signal light and the pumping light, in this embodiment, the first shaping lens 152 and the first collimating lens 11 are plated with a high-transmittance film layer matching the wavelength of the pumping light L2 emitted by the first pump laser chip 151, and the first reflector 153 and the first dichroic mirror 12 are plated with a high-reflection film layer matching the wavelength of the pumping light L2 emitted by the first pump laser chip 151; the second shaping lens 162 and the second collimating lens 14 are both plated with high-transmittance film layers matched with the wavelength of the pump light L3 emitted by the second pump laser chip 161, and the second reflecting mirror 163 and the second dichroic mirror 13 are both plated with high-reflection film layers matched with the wavelength of the pump light L3 emitted by the second pump laser chip 161; the first collimating lens 11, the second collimating lens 14, the first dichroic mirror 12 and the second dichroic mirror 13 are all plated with high-transmittance film layers with the wavelength matching with the last-stage signal light L1 incident from the input optical fiber F1.

According to the application scenario of laser processing, in this embodiment, the wavelength of the pump light L2 emitted by the first pump laser chip 151 is 915nm or 976nm, the wavelength of the pump light L3 emitted by the second pump laser chip 161 is 915nm or 976nm, and the wavelength of the previous-stage signal light incident from the input optical fiber F1 is 1064nm, so as to reduce the loss of the signal light and the pump light, in this embodiment, specifically, when the wavelength of the pump light L2 emitted by the first pump laser chip 151 is 915nm, the first shaping lens 152 and the first collimating lens 11 are both plated with a high-transmission film layer of 915nm, and the first reflector 153 and the first dichroic mirror 12 are both plated with a high-reflection film layer of 915 nm; when the wavelength of the pump light L2 emitted by the first pump laser chip 151 is 976nm, the first shaping lens 152 and the first collimating lens 11 are both plated with a 976nm high-transmittance film layer, and the first reflecting mirror 153 and the first dichroic mirror 12 are both plated with a 976nm high-reflectance film layer; when the wavelength of the pump light L3 emitted by the second pump laser chip 161 is 915nm, the second shaping lens 162 and the second collimating lens 14 are both plated with a 915nm high-transmittance film layer, and the second reflecting mirror 163 and the second dichroic mirror 13 are both plated with a 915nm high-reflectance film layer; when the wavelength of the pump light L3 emitted by the second pump laser chip 161 is 976nm, the second shaping lens 162 and the second collimating lens 14 are both coated with a 976nm high-transmittance film layer, and the second reflecting mirror 163 and the second dichroic mirror 13 are both coated with a 976nm high-reflectance film layer. In this embodiment, the first collimating lens 11, the second collimating lens 14, the first dichroic mirror 12, and the second dichroic mirror 13 are all plated with a high-transmittance film layer of 1064 nm.

In the present embodiment, the 915nm high transmittance film layer means that the transmittance of 915nm pump light is 97% to 99.8%; the 976nm high-transmittance film layer means that the 976nm pump light transmittance is 97-99.8%; the 915nm high-reflection film layer means that the reflectivity of 915nm pump light is 97-99.8%; the 976nm high-reflection film layer means that the reflectivity of 976nm pump light is 97-99.8%; the high-transmittance film layer with the wavelength of 1064nm means that the transmittance of 1064nm signal light is 97-99.8%. It can be derived from these transmittances and reflectivities, when the semiconductor fiber coupling module 20 is applied to a fiber laser amplification system or a fiber laser, the pump light L2/L3 and the signal light L1 will still remain in the housing H, and therefore, in this embodiment, the housing H is made of a metal material with good thermal conductivity, such as an aluminum alloy, a copper alloy, and the like, so as to quickly convert the residual pump light L2/L3 and the signal light L1 into heat and quickly guide the heat out of the housing H.

In some embodiments, the input fiber F1 and the output fiber F2 are each any one of a single clad fiber, a multi-clad fiber, a polarization maintaining fiber, a tapered fiber, an active fiber, or a photonic crystal fiber. In this embodiment, the input fiber F1 and the output fiber F2 are preferably multi-clad fibers, so that the semiconductor fiber coupling module 20 is applied to a fiber laser amplification system or a pulse fiber laser to output a better beam quality.

In some embodiments, please continue to refer to fig. 3 and 4, a first protective sleeve 17 and a second protective sleeve 18 are respectively disposed on two opposite sides of the housing H, one end of the input optical fiber F1 is accommodated in the first protective sleeve 17, and one end of the output optical fiber F2 is accommodated in the second protective sleeve 18, so that the input optical fiber F1 and the output optical fiber F2 can be accurately connected to the optical path in the housing H in a plug-in manner, and manual operation is facilitated.

In some embodiments, at least one set of power pins 19 is installed on the housing H, and the backward pumping module 15 and the forward pumping module 16 are respectively connected to one set of power pins, that is, one set of power pins is electrically connected to the positive electrode and the negative electrode of the backward pumping module 15 to supply power to the first pumping laser chip 151; and the other group of power supply pin pins are electrically connected with the positive electrode and the negative electrode of the forward pumping module 16 to supply power to the second pumping laser chip 161 so as to obtain better output power and reduce power consumption. Preferably, this embodiment, install a set of power pin 19 on the casing H, including first power pin 191 and second power pin 192, first power pin 191 in proper order with forward pumping module 16, reverse pumping module 15 and second power pin 192 electricity are connected, even if in forward pumping module 16, the reverse pumping module 15 first pump laser chip 151 and second pump laser chip 161 series connection make first pump laser chip 151 launches pump light L2, second pump laser chip 161 launches pump light L3, has simplified the connected mode of circuit.

In addition, the present embodiment also provides a fiber laser amplification system, which includes the semiconductor fiber coupling module 20 in the above embodiments.

In addition, the present embodiment further provides a pulse fiber laser, which includes the semiconductor fiber coupling module 20 in the above embodiments, and the pulse fiber laser can be applied to laser welding and laser cutting, and preferably, applied to laser marking.

Compared with the prior art, (1) the present embodiment provides a semiconductor fiber coupling module 20, including: the device comprises a shell H, an input optical fiber F1 and an output optical fiber F2 which are arranged on two opposite sides of the shell H, and a first collimating lens 11, a first dichroic mirror 12, a second dichroic mirror 13 and a second collimating lens 14 which are contained in the shell H and are sequentially arranged along the incident optical axis of the upper-stage signal light L1; the installation platform Q is fixed on the bottom plate of the casing, and the installation platform Q and the forward pumping module 16 are accommodated in the casing H, wherein at least one backward pumping module 15 and at least one forward pumping module 16 are arranged in the casing H, the backward pumping module 15 and the forward pumping module 16 are fixed on the side surface of the installation platform Q, which is away from the bottom plate, the backward pumping module 15 emits pumping light L2, the pumping light L2 passes through the first dichroic mirror 12 and then is output from the input optical fiber F1 through the first collimating lens 11, the forward pumping module 16 emits pumping light L3, the pumping light L3 passes through the second dichroic mirror 13 and then is output from the output optical fiber F2 through the second collimating lens 14, and through spatial coupling, the integration of the forward pumping module 15 and the backward pumping module 16 is realized, a beam combiner is omitted, the welding point is reduced, and the deterioration of the light beam quality is reduced; (2) heat sinks are respectively attached between the first pump laser chip 151 and the second pump laser chip 161 and the mounting platform Q, so that the heat dissipation efficiency of the forward pump module 16 and the backward pump module 15 is improved, and further, the use safety of the semiconductor optical fiber coupling module 20 is ensured; (3) casing H's the relative both sides are provided with first protection 17 cover and second protective sheath 18 respectively, input fiber F1 one end accept in the first protective sheath 17, output fiber F2's one end accept in the second protective sheath 18, can realize input fiber F1, output fiber F2 through the mode of plug with the accurate connection of transmission of the light path in the casing H, the manual operation of being convenient for.

Furthermore, because will the utility model provides a semiconductor fiber coupling module 20 uses in optic fibre laser amplification system and pulse fiber laser, only need respectively with input fiber F1 with output fiber F2 connects, and the installation is simpler, is favorable to the high integrated equipment of fiber laser.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. A semiconductor fiber coupling module, comprising: the device comprises a shell, an input optical fiber and an output optical fiber which are arranged on two opposite sides of the shell, and a first collimating lens, a first dichroic mirror, a second dichroic mirror and a second collimating lens which are contained in the shell and are sequentially arranged along an incident optical axis of the signal light of the previous stage; the device comprises a mounting table fixed on a bottom plate of the shell, and at least one backward pumping module and at least one forward pumping module contained in the shell, wherein the backward pumping module and the forward pumping module are fixed on the side surface of the mounting table back to the bottom plate, the backward pumping module emits pumping light to pass through a first dichroic mirror and then output from the input optical fiber through a first collimating lens, and the forward pumping module emits pumping light to pass through a second dichroic mirror and then output from the output optical fiber through a second collimating lens.

2. The semiconductor fiber coupling module according to claim 1, wherein the backward pumping module and the forward pumping module are respectively disposed at both sides along an incident optical axis of the previous-stage signal light, or the backward pumping module and the forward pumping module are both disposed at the same side along an incident optical axis of the previous-stage signal light.

3. The semiconductor fiber coupling module according to claim 2, wherein one backward pumping module and three forward pumping modules are disposed in the housing, the mounting stage is stepped, so that the three forward pumping modules are sequentially arranged on the mounting stage in a height difference manner, and the stepped mounting stage has the lowest height at a side close to the incident optical axis of the previous-stage signal light.

4. The semiconductor fiber coupling module according to any one of claims 1 to 3, wherein the backward pumping module comprises a first pumping laser chip, a first shaping lens and a first reflector, the forward pumping module comprises a second pumping laser chip, a second shaping lens and a second reflector, the pumping light emitted by the first pumping laser chip passes through the first shaping lens, the first reflector, the first dichroic mirror, the first collimating lens and the input fiber in sequence, and the pumping light emitted by the second pumping laser chip passes through the second shaping lens, the second reflector, the second collimating lens and the output fiber in sequence.

5. The semiconductor fiber coupling module of claim 4, wherein heat sinks are attached between the first pump laser chip and the mounting stage and between the second pump laser chip and the mounting stage.

6. The semiconductor fiber coupling module of claim 4, wherein the first shaping lens and the first collimating lens are plated with high-transmittance film layers matching the wavelength of the pump light emitted by the first pump laser chip, and the first mirror and the first dichroic mirror are plated with high-reflection film layers matching the wavelength of the pump light emitted by the first pump laser chip; the second shaping lens and the second collimating lens are both plated with high-transmittance film layers matched with the wavelength of the pump light emitted by the second pump laser chip, and the second reflecting mirror and the second dichroic mirror are both plated with high-reflection film layers matched with the wavelength of the pump light emitted by the second pump laser chip; and the first collimating lens, the second collimating lens, the first dichroic mirror and the second dichroic mirror are all plated with high-transmittance film layers matched with the wavelength of the last-stage signal light emitted from the input optical fiber.

7. The semiconductor fiber coupling module of claim 5, wherein the first pump laser chip emits pump light with a wavelength of 915nm or 976nm, the second pump laser chip emits pump light with a wavelength of 915nm or 976nm, and the wavelength of the previous-stage signal light incident from the input fiber is 1064 nm.

8. The semiconductor fiber coupling module according to claim 4, wherein a first protective sheath and a second protective sheath are respectively disposed on opposite sides of the housing, one end of the input optical fiber being received in the first protective sheath, and one end of the output optical fiber being received in the second protective sheath; the shell is provided with at least one group of power supply pin, and the power supply pin is respectively and electrically connected with the forward pumping module and the reverse pumping module; the input optical fiber and the output optical fiber are respectively any one of a single-clad optical fiber, a multi-clad optical fiber, a polarization maintaining optical fiber, a tapered optical fiber, an active optical fiber or a photonic crystal optical fiber.

9. A fiber laser amplification system, comprising: the semiconductor fiber coupling module according to any one of claims 1-8.

10. A pulsed fiber laser, comprising: the semiconductor fiber coupling module according to any one of claims 1-8.

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