CN219937587U - Laser light source and fiber laser - Google Patents

Abstract

The technical scheme of the utility model discloses a laser light source and an optical fiber laser. The laser light source includes: at least two seed light sources, a wave combining device and a collimator; the seed light source is used for emitting single-wavelength signal light; the wave combining device is used for changing the light path of the single-wavelength signal light emitted by the seed light source so as to combine the single-wavelength signal light into multi-wavelength signal light; the collimator is used for receiving the multi-wavelength signal light to output multi-wavelength collimated signal light. The laser light source adopts a simple light path structure to realize multi-wavelength light output, and is easy to integrate an ultra-compact structure; the fiber laser adopting the laser source can realize small volume and low cost, and has the advantages of low power consumption, high output power, high stability, reliability and the like.

Description

Laser light source and fiber laser

Technical Field

The utility model relates to the technical field of laser, in particular to a laser source and an optical fiber laser.

Background

Along with the rapid development of laser technology and the wide application of the laser technology in the fields of laser radar, optical fiber sensing, cable television, intelligent automobile automatic driving and the like, the application requirements of the laser pulse synchronization of different wavelengths are also increased, and the application requirements of a laser source capable of outputting multi-wavelength light and an optical fiber laser are also increased.

Taking a laser light source outputting dual-wavelength light as an example, a Wavelength Division Multiplexer (WDM) is generally used to couple signals output by two single-wavelength laser Seed source chips (Seed) into dual-wavelength signal light at present, but the cost and the volume of the wavelength division multiplexer are limited, and the problems of high cost, large volume, difficult integration and the like exist in the scheme at present.

On the other hand, with the development of laser technology, there is also an increasing demand for the volume, power consumption and cost of the fiber laser, which mainly includes a laser light source and an amplifying module for amplifying the signal light output from the laser light source. The problems of high cost, large volume and the like of the multi-wavelength laser source for outputting the signal light with different wavelengths also directly influence and limit the development and the application of the multi-wavelength fiber laser.

Disclosure of Invention

The technical scheme of the utility model aims to solve the problems that the existing multi-wavelength laser light source and fiber laser for outputting signal light with different wavelengths are high in cost, large in size, difficult to integrate and the like.

In order to solve the above technical problems, the present utility model provides a laser light source, including: at least two seed light sources, a wave combining device and a collimator; the seed light source is used for emitting single-wavelength signal light; the wave combining device is used for changing the light path of the single-wavelength signal light emitted by the seed light source so as to combine the single-wavelength signal light into multi-wavelength signal light; the collimator is used for receiving the multi-wavelength signal light to output multi-wavelength collimated signal light.

Optionally, the laser light source includes two seed light sources, the wave combining device includes a wave plate, wherein the single wavelength signal light emitted by one seed light source is transmitted through the wave plate, and the single wavelength signal light emitted by the other seed light source is reflected by the wave plate and then combined into the collimator.

Optionally, the laser light source comprises three seed light sources, and the wave synthesizing device comprises a prism, a wave plate arranged on one side surface of the prism and a high-reflection film arranged on the other side surface of the prism; the single-wavelength signal light emitted by one seed light source is transmitted through the wave plate to enter the prism, the single-wavelength signal light emitted by the other two seed light sources is transmitted through the wave plate to enter the prism and reflected by the high-reflection film, and then the single-wavelength signal light is combined and transmitted through the prism to enter the collimator.

Optionally, the laser light source further comprises a semiconductor refrigerator, and the seed light source and the wave combining device are arranged on the surface of the semiconductor refrigerator.

Optionally, the laser light source is packaged as an integrated structure.

In order to solve the above technical problems, the present utility model further provides an optical fiber laser, including: the laser light source, the active optical fiber, the pump light source and the beam combiner for receiving the pump light emitted by the pump light source are described above; the active optical fiber amplifies the multi-wavelength collimation signal light output by the laser light source based on the pump light output by the beam combiner.

Optionally, the fiber laser further includes a first isolator and a second isolator; the pump light source and the beam combiner are arranged in front of the active optical fiber, the first isolator is connected between the laser light source and the beam combiner through the optical fiber, and the second isolator is connected with the active optical fiber through the optical fiber.

Optionally, the fiber laser further includes a first isolator and a second isolator; the pump light source and the beam combiner are arranged behind the active optical fiber, the first isolator is connected between the laser light source and the active optical fiber through the optical fiber, and the second isolator is connected with the beam combiner through the optical fiber.

Optionally, the laser further includes a wavelength division multiplexer connected to the second isolator through an optical fiber.

Optionally, the active optical fiber is a rare earth doped optical fiber.

Compared with the prior art, the technical scheme of the utility model adopts the wave combining device to change the optical path of the single-wavelength signal light so as to combine multiple paths of single-wavelength signal light into one path of multi-wavelength signal light, and has simple optical path structure and easy realization, such as realizing the combination of the signal light by adopting few optical devices, thereby realizing low cost.

The multi-path single-wavelength signal light is combined, only one set of semiconductor refrigerator module is needed for heat dissipation, multiple sets of semiconductor refrigerator modules are not needed to be driven and controlled by a complex driving circuit, the components and the corresponding space of the driving circuit of the refrigerator are saved in actual use, the circuit cost and the design difficulty are effectively reduced, and the high integration of the light source module is facilitated.

The integrated laser light source packaging structure has the advantages of compact size, high reliability, high conversion efficiency and the like, and can realize multi-wavelength light output only by one set of driving circuit in the use process. Compared with the traditional optical fiber laser in which a plurality of seed light sources are driven by a driving circuit, the device of the driving circuit is reduced, the size and design difficulty of the driving circuit are reduced, the cost and the power consumption are effectively reduced, the reliability and the stability of the device are greatly improved, and the high integration of the pulse light source module is facilitated.

Drawings

Fig. 1 and fig. 2 are schematic structural diagrams of a laser light source according to an embodiment of the present utility model;

fig. 3 and 4 are schematic structural diagrams of a fiber laser according to an embodiment of the present utility model.

The following supplementary explanation is given to the accompanying drawings:

1a,1b,1 c-seed light source; a2, 21-wave plate; a 3-collimator; 4-semiconductor refrigerator;

22-prisms; 23-a highly reflective film;

a1 B1-a laser light source; a21 B21—a first separator; a22 B22—a second separator;

a3 B3-active optical fiber; a41 A42, B41, B42-pump light source;

a5 B5-beam combiner; a6 B6-wavelength division multiplexer.

Detailed Description

The laser light source provided by the technical scheme of the utility model comprises: at least two seed light sources, a wave combining device and a collimator; the seed light source is used for emitting single-wavelength signal light; the wave combining device is used for changing the light path of the single-wavelength signal light emitted by the seed light source so as to combine the single-wavelength signal light into multi-wavelength signal light; the collimator is used for receiving the multi-wavelength signal light to output multi-wavelength collimated signal light.

The specific implementation of the laser light source of the present utility model will be described in detail below with reference to the drawings by taking two seed light sources and three seed light sources as examples, and those skilled in the art will understand that, on the basis of this, the number of seed light sources is increased and suitable wave combining devices are selected to change the optical paths of part or all of the single wavelength signal lights, so as to realize the combination of multiple single wavelength signal lights, thereby realizing the output of signal lights with more wavelengths. The optical path is defined as a propagation path or a movement track of light.

Referring to fig. 1, the laser light source of the present embodiment includes two seed light sources 1a,1b, a wave combining device and a collimator 3.

The seed light sources 1a and 1b are configured to emit signal light of a single wavelength, for example, the seed light source 1a emits pulse laser light having a wavelength of 1540nm, and the seed light source 1b emits pulse laser light having a wavelength of 1560 nm. The seed light sources 1a,1b may be laser seed source chips having a small volume.

The wave combining device of the embodiment is used for changing the optical path of the single-wavelength signal light emitted by the seed light source so as to combine the single-wavelength signal light into the double-wavelength signal light. The wave combining device of the present embodiment includes a wave plate 2, and the positional relationship and arrangement angle of seed light sources 1a,1b and wave plate 2 are aimed at enabling the following optical paths (indicated as arrowed lines in fig. 1): the single-wavelength signal light emitted by one seed light source 1a is transmitted through the wave plate 2, and the single-wavelength signal light emitted by the other seed light source 1b is reflected by the wave plate 2 and then combined into the collimator 3. Specifically, the seed light source 1a and the seed light source 1b are respectively arranged on both sides of the wave plate 2, one side outer surface 2e and the other side inner surface 2i of the wave plate 2 have high transmittance (for example, transmittance is 99% or more), and the other side outer surface 2f of the wave plate 2 has high reflectance (for example, reflectance is 99% or more). The single wavelength signal light emitted from the seed light source 1a is incident on one side outer surface 2e and the other side inner surface 2i of the wave plate 2, that is, transmitted through the wave plate 2 to obtain transmitted light, the single wavelength signal light emitted from the seed light source 1b is incident on the other side outer surface 2f of the wave plate 2 to obtain reflected light, and then the reflected light and the transmitted light are combined and enter the collimator 3.

It should be noted that, in this embodiment, the wave plate may be used to combine two paths of single-wavelength signal light with a very simple optical path, but the wave plate 2 is not limited to a wave plate, and other applicable optical devices may be used to combine two paths of single-wavelength signal light.

The collimator 3 is for receiving the dual-wavelength signal light to output dual-wavelength collimated signal light. The collimator 3 converts the incoming dual-wavelength signal light into parallel light (gaussian beam), which functions to couple the light into a device externally connected to the laser light source with maximum efficiency or to receive the signal light with maximum efficiency.

Further, in consideration of the temperature change during the operation of the laser light source, the laser light source of the present embodiment further includes a semiconductor refrigerator (TEC) 4, and the seed light sources 1a,1b and the wave plate 2 are disposed on the surface of the semiconductor refrigerator 4. The semiconductor refrigerator 4 is driven and controlled by a refrigeration driving circuit, and can stabilize the seed light sources 1a and 1b at a specific temperature, namely, the seed light sources 1a and 1b are kept at a constant temperature, so that signal light with stable and unchanged wavelength can be output.

Since the seed light sources 1a and 1b can be laser seed source chips with small volumes, and the wave plate 2, the collimator 3 and the semiconductor refrigerator 4 can all be applicable to existing small-size devices, the laser light source of the embodiment can be packaged into an integrated structure, for example, the laser seed source chips, the wave plate, the collimator and the semiconductor refrigerator are packaged in a BOX-type metal shell by using a BOX packaging process, so that an ultra-compact integrated structure is realized.

Referring to fig. 2, the laser light source of the present embodiment includes three seed light sources 1a,1b,1c, a wave combining device and a collimator 3.

The seed light sources 1a,1b,1c are used to emit single wavelength signal light, for example, the seed light source 1a emits pulse laser light with a wavelength of 1520nm, the seed light source 1b emits pulse laser light with a wavelength of 1540nm, and the seed light source 1c emits pulse laser light with a wavelength of 1540 nm. The seed light sources 1a,1b,1c may be laser seed source chips having a small volume.

The wave combining device of the embodiment is used for changing the optical path of the single-wavelength signal light emitted by the seed light source so as to combine the single-wavelength signal light into the three-wavelength signal light. The wave combining device of the present embodiment may include a wave plate 21, a prism 22, and a high reflection film 23, the wave plate 21 being disposed on one side surface of the prism 22, and the high reflection film 23 being disposed on the other side surface of the prism 22. The reflectance of the highly reflective film 23 employed in this embodiment may be 99% or more.

The positional relationship and arrangement angle of the seed light sources 1a,1b,1c and the wave plate 21, the prism 22, the highly reflective film 23 are aimed at enabling the following optical paths (indicated as arrowed lines in fig. 2): the single-wavelength signal light emitted by one seed light source 1a is transmitted through the wave plate 21 into the prism 22, and the single-wavelength signal light emitted by the other two seed light sources 1b and 1c is transmitted through the wave plate 21 into the prism 22 and reflected by the high-reflection film 23, and then is combined and transmitted through the prism 22 into the collimator 3. Specifically, referring to fig. 1 in combination, similar to the wave plate 2, the one side outer surface 2e and the other side inner surface 2i of the wave plate 21 have high transmittance (e.g., transmittance of 99% or more), and the other side outer surface 2f of the wave plate 21 has high reflectance (e.g., reflectance of 99% or more). The single-wavelength signal light emitted by the seed light source 1a is transmitted through the wave plate 21 and enters the prism 22 to obtain transmitted light; the single-wavelength signal light emitted by the seed light source 1b is transmitted through the wave plate 21 and enters the prism 22, and is reflected by the high-reflection film 23 on the surface of the other side of the prism 22 to obtain primary reflected light; the single-wavelength signal light emitted by the seed light source 1c is transmitted through the wave plate 21 and enters the prism 22, and tertiary reflection light is obtained through tertiary reflection of the high reflection film 23 on the other side surface of the prism 22, the wave plate 21 on the one side surface of the prism 22 and the high reflection film 23 on the other side surface of the prism 22; the transmitted light, the primary reflected light, and the tertiary reflected light are then combined and transmitted through the prism 22 into the collimator 3.

It should be noted that, in this embodiment, the combination of the wave plate, the prism and the high reflection film may realize the combination of three paths of single wavelength signal light with a simple light path. In other embodiments, the wave plate 21, the prism 22 and the high reflection film 23 are not limited to the wave plate, and other applicable optical devices capable of combining three single-wavelength signal lights may be used. For example, with the structure shown in fig. 1 as a reference, the single-wavelength signal light output by two seed light sources is combined into the dual-wavelength signal light by using a wave plate, and then the dual-wavelength signal light and the single-wavelength signal light output by another seed light source are combined into the three-wavelength signal light by using a wave plate. In addition, in the structure shown in fig. 2, if the seed light source 1b or 1c is not provided, or the seed light source 1b or 1c is controlled to be not operated, the combination of two paths of single-wavelength signal light into one path of dual-wavelength signal light can be realized.

The collimator 3 is configured to receive the three-wavelength signal light to output three-wavelength collimated signal light. The collimator 3 converts the entered three-wavelength signal light into parallel light (gaussian beam), and its function is to couple the light into a device externally connected to the laser light source at maximum efficiency or to receive the signal light at maximum efficiency.

Further, in consideration of the temperature change during the operation of the laser light source, the laser light source of the present embodiment further includes a semiconductor refrigerator (TEC) 4, and the seed light sources 1a,1b,1c and the wave plate 21, the prism 22, and the high reflection film 23 are disposed on the surface of the semiconductor refrigerator 4. The semiconductor refrigerator 4 is driven and controlled by a refrigeration driving circuit, and can stabilize the seed light sources 1a,1b,1c at a specific temperature, namely, the seed light sources 1a,1b,1c are kept at a constant temperature, so that signal light with stable and unchanged wavelength can be output.

Since the seed light sources 1a,1b,1c can be laser seed source chips with small volumes, and the wave plate 21, the prism 22, the high reflection film 23, the collimator 3 and the semiconductor refrigerator 4 are all available in the existing small-sized devices, the laser light source of the embodiment can be packaged into an integrated structure, for example, the laser seed source chips, the wave plate, the prism, the high reflection film, the collimator and the semiconductor refrigerator are packaged in a BOX-type metal shell by using a BOX packaging process, thereby realizing an ultra-compact integrated structure.

The optical fiber laser provided by the technical scheme of the utility model comprises the following components: the device comprises a laser light source, an active optical fiber, a pump light source and a beam combiner.

The laser light source outputs multi-wavelength collimated signal light, such as dual-wavelength collimated signal light, three-wavelength collimated signal light, etc., and specific structures thereof may be described in detail with reference to fig. 1 and 2. The beam combiner is used for receiving the pump light emitted by the pump light source and transmitting the pump light to the active optical fiber. The active optical fiber amplifies the multi-wavelength collimated signal light based on the pump light output by the beam combiner. The following describes the specific implementation of the fiber laser according to the present utility model in detail with reference to the accompanying drawings.

Referring to fig. 3, the fiber laser of the present embodiment includes: a laser light source A1, an active optical fiber A3, pump light sources A41 and A42 and a beam combiner A5.

The laser light source A1 is used for outputting multi-wavelength collimated signal light, and its structure can be as shown in fig. 1 or fig. 2. The pump light sources A41 and A42 are used for emitting pump laser and providing energy for laser amplification. The Pump light sources a41, a42 may employ multimode Pump (Pump) laser chips. According to practical application requirements, the pump light sources a41 and a42 can realize multiple working modes by the control logic, and may include, for example: (1) Selecting a pump light source A41 or a pump light source A42 to work and outputting pump light; (2) When the pump light source A41 fails in operation, switching to the pump light source A42 for operation; or when the pump light source A42 fails in operation, switching to the pump light source A41 for operation; (3) The pump light source A41 and the pump light source A42 work together, and the output pump light is injected into the active optical fiber A3 after being combined by the beam combiner A5 to provide energy for the active optical fiber A3.

In this embodiment, the pump light sources a41 and a42 and the beam combiner A5 are disposed behind the active optical fiber A3, the pump light sources a41 and a42 are respectively connected with the beam combiner A5 through optical fibers, and the active optical fiber A3 is connected with the beam combiner A5 through optical fibers. The beam combiner A5 receives the pump light emitted by the pump light sources a41, a42 and transmits the pump light to the active optical fiber A3 through the optical fiber. The active optical fiber A3 is used as a gain medium of the optical fiber laser, receives the pump light transmitted by the beam combiner A5, absorbs energy provided by the pump light, and amplifies the input multi-wavelength collimation signal light. The amplified multi-wavelength collimated signal light output by the active optical fiber A3 is transmitted to the beam combiner A5 through the optical fiber, and the beam combiner A5 outputs the amplified multi-wavelength collimated signal light.

Further, the fiber laser of the present embodiment further includes a first isolator a21 and a second isolator a22. The first isolator a21 is connected between the laser light source A1 and the active optical fiber A3 through an optical fiber, and the second isolator a22 is connected with the beam combiner A5 through an optical fiber. The multi-wavelength collimation signal light output by the laser light source A1 is input into the active optical fiber A3 through the first isolator A21, the multi-wavelength collimation signal light is amplified by the active optical fiber A3, and the amplified multi-wavelength collimation signal light is output through the active optical fiber A3, the beam combiner A5 and the second isolator A22.

The isolator allows only unidirectional laser light to pass through as indicated by the direction of the arrows in the isolators a21, a22 in fig. 3. The first isolator a21 is used for protecting the laser light source A1, so that the influence or even damage of the reverse laser entering the laser light source A1 can be avoided. The second isolator a22 is used for protecting the active optical fiber A3, the beam combiner A5 and other devices, and can avoid the influence and even the damage of the devices in the optical fiber laser caused by the reverse laser entering the optical fiber laser.

According to practical application requirements, the fiber laser of the present embodiment may further include a wavelength division multiplexer A6, where the wavelength division multiplexer A6 is connected to the second isolator a22 through an optical fiber, and is configured to divide the amplified multi-wavelength collimated signal light output by the second isolator a22 into multiple amplified single-wavelength signal lights. In other embodiments, other devices with a splitting effect may be used to split the amplified multi-wavelength collimated signal light into multiple amplified single-wavelength signal lights.

Referring to fig. 4, the fiber laser of the present embodiment includes: a laser light source B1, an active optical fiber B3, pump light sources B41 and B42 and a beam combiner B5.

The laser light source B1 is used for outputting multi-wavelength collimated signal light, and its structure can be as shown in fig. 1 or fig. 2. The pump light sources B41 and B42 are used for emitting pump laser and providing energy for laser amplification. The Pump light sources B41, B42 may employ multimode Pump (Pump) laser chips. According to practical application requirements, the pump light sources B41 and B42 can realize multiple working modes by the control logic, and may include, for example: (1) Selecting a pump light source B41 or a pump light source B42 to work and outputting pump light; (2) When the pump light source B41 fails in operation, switching to the pump light source B42 for operation; or when the pump light source B42 fails in operation, switching to the pump light source B41 for operation; (3) The pump light source B41 and the pump light source B42 work together, and the output pump light is injected into the active optical fiber B3 after being combined by the beam combiner B5, so as to provide energy for the active optical fiber B3.

In this embodiment, the pump light sources B41 and B42 and the beam combiner B5 are disposed in front of the active optical fiber B3, the pump light sources B41 and B42 are respectively connected with the beam combiner B5 through optical fibers, and the active optical fiber B3 is connected with the beam combiner B5 through optical fibers. The beam combiner B5 receives the pump light emitted by the pump light sources B41 and B42 and transmits the pump light to the active optical fiber B3 through the optical fibers, and the beam combiner B5 also receives the multi-wavelength collimated signal light output by the laser light source B1 and transmits the multi-wavelength collimated signal light to the active optical fiber B3 through the optical fibers. The active optical fiber B3 is used as a gain medium of the optical fiber laser, receives the pump light transmitted by the beam combiner B5, absorbs energy provided by the pump light, and amplifies the input multi-wavelength collimation signal light. The active optical fiber B3 outputs the amplified multi-wavelength collimated signal light.

Further, the fiber laser of the present embodiment further includes a first isolator B21 and a second isolator B22. The first isolator B21 is connected between the laser light source B1 and the beam combiner B5 by an optical fiber, and the second isolator B22 is connected with the active optical fiber B3 by an optical fiber. The multi-wavelength collimation signal light output by the laser light source B1 is input into the active optical fiber B3 through the first isolator B21 and the beam combiner B5, the multi-wavelength collimation signal light is amplified by the active optical fiber B3, and the amplified multi-wavelength collimation signal light is output through the active optical fiber B3 and the second isolator B22.

The isolator allows only unidirectional laser light to pass through as indicated by the direction of the arrows in the isolators B21, B22 in fig. 4. The first isolator B21 is used for protecting the laser light source B1, so that the influence or even damage of the reverse laser entering the laser light source B1 can be avoided. The second isolator B22 is used for protecting the active optical fiber B3, the beam combiner B5 and other devices, and can avoid the influence and even the damage of the devices in the optical fiber laser caused by the reverse laser entering the optical fiber laser.

According to practical application requirements, the fiber laser of the present embodiment may further include a wavelength division multiplexer B6, where the wavelength division multiplexer B6 is connected to the second isolator B22 through an optical fiber, and is configured to divide the amplified multi-wavelength collimated signal light output by the second isolator B22 into multiple amplified single-wavelength signal lights. In other embodiments, other devices with a splitting effect may be used to split the amplified multi-wavelength collimated signal light into multiple amplified single-wavelength signal lights.

In the above embodiment, the active optical fiber is a rare earth doped optical fiber. The rare earth doped optical fiber utilizes the doped rare earth elements in the optical fiber, such as erbium elements with the greatest application, and utilizes the current to drive pumping light to excite the doped elements so as to enable the doped elements to generate upward energy level transition, and when signal light is input, the disturbance energy level is in downward transition, and light with the same frequency, wavelength and polarization as the input light is emitted, so that amplified output light is formed.

In the above embodiment, the pump light source and the rare-earth doped fiber of the amplifying portion are selected according to the wavelength of the signal light output by the laser light source, for example, the wavelength range of the signal light is 1520 nm-1560 nm, for example, the wavelength of the signal light is 1540nm, the erbium-ytterbium co-doped fiber is selected, the wavelength range of the pump light output by the pump light source is 900 nm-980 nm, for example, the wavelength of the pump light is 960nm; the wavelength range of the signal light is 1044 nm-1084 nm, for example, the wavelength of the signal light is 1064nm, ytterbium-doped optical fibers are selected, the wavelength range of the pump light output by the pump light source is 900 nm-980 nm, for example, the wavelength of the pump light is 960nm; the wavelength range of the signal light is 1880 nm-2020 nm, for example, the wavelength of the signal light is 2000nm, the thulium doped optical fiber is selected, the wavelength range of the pump light output by the pump light source is 900 nm-980 nm, for example, the wavelength of the pump light is 960nm.

It should be noted that, the fiber laser of the above embodiment includes a pump light source, a beam combiner and a primary amplification formed by an active fiber, and in other embodiments, two-stage, three-stage or more-stage amplification may be performed according to practical application requirements. In the above embodiment, two pumping light sources are provided, and it will be understood by those skilled in the art that, according to practical applications, only one or more than two pumping light sources may be provided, and if two or more pumping light sources are provided, the amplifying portion structure is adaptively changed, so that the amplifying of the multi-wavelength laser can be achieved. In addition, in other embodiments, the first isolator and/or the second isolator may not be required if the requirements for the return light influencing device are not high.

In summary, the technical scheme of the utility model has the following advantages: the simple light path structure is easy to realize and has low cost; the multi-wavelength laser light source is easy to integrate into an ultra-compact structure; the optical fiber laser adopting the ultra-compact laser light source can realize small volume and low cost; the multi-wavelength output fiber laser has low power consumption, high output power, high stability and reliability.

Although the present utility model has been described with respect to the preferred embodiments, it is not intended to limit the utility model thereto, and any person skilled in the art may make any possible variations and modifications to the technical solution of the present utility model using the methods and techniques disclosed herein without departing from the spirit and scope of the present utility model, and therefore any simple modifications, equivalent variations and modifications to the above embodiments according to the technical substance of the present utility model fall within the scope of the technical solution of the present utility model.

Claims (10)

1. A laser light source, comprising: at least two seed light sources, a wave combining device and a collimator; wherein,,

the seed light source is used for emitting single-wavelength signal light;

the wave combining device is used for changing the light path of the single-wavelength signal light emitted by the seed light source so as to combine the single-wavelength signal light into multi-wavelength signal light;

the collimator is used for receiving the multi-wavelength signal light to output multi-wavelength collimated signal light.

2. The laser light source of claim 1, comprising two seed light sources, wherein the wave combining device comprises a wave plate, wherein the single wavelength signal light emitted by one seed light source is transmitted through the wave plate, and the single wavelength signal light emitted by the other seed light source is reflected by the wave plate and then combined into the collimator.

3. The laser light source according to claim 1, comprising three seed light sources, wherein the wave combining device comprises a prism, a wave plate arranged on one side surface of the prism, and a highly reflective film arranged on the other side surface of the prism; the single-wavelength signal light emitted by one seed light source is transmitted through the wave plate to enter the prism, the single-wavelength signal light emitted by the other two seed light sources is transmitted through the wave plate to enter the prism and reflected by the high-reflection film, and then the single-wavelength signal light is combined and transmitted through the prism to enter the collimator.

4. The laser light source of claim 1, further comprising a semiconductor refrigerator, wherein the seed light source, the wave combining device are disposed on a surface of the semiconductor refrigerator.

5. The laser light source of any one of claims 1 to 4, wherein the laser light source is packaged as a unitary structure.

6. A fiber laser, comprising: the laser light source of any one of claims 1 to 5, an active optical fiber, a pump light source and a combiner for receiving pump light emitted by the pump light source; wherein,,

the beam combiner is connected with the active optical fiber through an optical fiber, and the active optical fiber amplifies multi-wavelength collimation signal light output by the laser light source based on pump light output by the beam combiner.

7. The fiber laser of claim 6, further comprising a first isolator and a second isolator; the pump light source and the beam combiner are arranged in front of the active optical fiber, the first isolator is connected between the laser light source and the beam combiner through the optical fiber, and the second isolator is connected with the active optical fiber through the optical fiber.

8. The fiber laser of claim 6, further comprising a first isolator and a second isolator; the pump light source and the beam combiner are arranged behind the active optical fiber, the first isolator is connected between the laser light source and the active optical fiber through the optical fiber, and the second isolator is connected with the beam combiner through the optical fiber.

9. The fiber laser of claim 7 or 8, further comprising a wavelength division multiplexer connected to the second isolator by an optical fiber.

10. The fiber laser of claim 6, wherein said active fiber is a rare earth doped fiber.