CN114678759A - Optical fiber coupling crystal structure and gain device - Google Patents

Optical fiber coupling crystal structure and gain device Download PDF

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Publication number
CN114678759A
CN114678759A CN202210287263.XA CN202210287263A CN114678759A CN 114678759 A CN114678759 A CN 114678759A CN 202210287263 A CN202210287263 A CN 202210287263A CN 114678759 A CN114678759 A CN 114678759A
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China
Prior art keywords
fiber
end cap
signal
pump
crystal
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CN202210287263.XA
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Chinese (zh)
Inventor
李凯
李成宽
岳嵚
岳超瑜
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Shenzhen Lightcomm Technology Co ltd
Shenzhen Ouling Laser Technology Co ltd
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Shenzhen Lightcomm Technology Co ltd
Shenzhen Ouling Laser Technology Co ltd
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Priority to CN202210287263.XA priority Critical patent/CN114678759A/en
Publication of CN114678759A publication Critical patent/CN114678759A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details
    • H01S3/04—Arrangements for thermal management
    • H01S3/042—Arrangements for thermal management for solid state lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/163—Solid materials characterised by a crystal matrix

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Lasers (AREA)

Abstract

The application is suitable for the technical field of laser gain, and provides an optical fiber coupling crystal structure which comprises a first tail fiber, a first end cap, a laser medium, a second end cap and a second tail fiber; the first end cap and the second end cap are respectively arranged at two opposite sides of the laser medium, one end of the first tail fiber is connected to one side of the first end cap, which is far away from the laser medium, and one end of the second tail fiber is connected to one side of the second end cap, which is far away from the laser medium; the first end cap and the second end cap are made of glass materials; the application also provides a gain device, which comprises a first beam combiner, a second beam combiner, a first signal optical fiber, a second signal optical fiber, a first pump optical fiber, a second pump optical fiber and an optical fiber coupling crystal structure; this application structure is succinct, utilizes the end cap as intermediate medium, has realized utilizing optic fibre to laser crystal transmission signal light in solid laser, has improved the transmission efficiency of signal light, has reduced the complexity of exporting light simultaneously, and the practicality is strong.

Description

Optical fiber coupling crystal structure and gain device
Technical Field
The present disclosure relates to laser gain technologies, and in particular, to an optical fiber coupled crystal structure and a gain device.
Background
The traditional solid laser usually adopts a space optical path, and pumping light and signal light are incident into a laser crystal through a dichroic mirror to realize the amplification of the signal light. In recent years, besides the conventional laser crystal, there are also new crystal materials such as single crystal optical fiber, which are still single crystal materials in nature and are herein collectively referred to as laser crystals.
The space light path has the defects of large volume, complex installation and the like. Moreover, the output light is space light, and is more complex to use than the flexible output of the optical fiber; however, the melting points of the optical fiber and the laser crystal are different, so that the welding of the optical fiber and the laser crystal is difficult in processing, and the optical fiber transmission of the solid laser is difficult to realize.
Content of application
In order to solve the problems, the application provides an optical fiber coupling crystal structure, gain equipment and positive pump and negative pump gain methods, and solves the problems that in the prior art, a space optical path is large in size, complex to install and output light, and an optical fiber and a laser crystal are difficult to directly weld.
The embodiment of the application provides an optical fiber coupling crystal structure, which comprises a first tail fiber, a first end cap, a laser medium, a second end cap and a second tail fiber;
the first end cap and the second end cap are respectively connected to two opposite sides of the laser medium, one end of the first tail fiber is connected to one side, far away from the laser medium, of the first end cap, and one end of the second tail fiber is connected to one side, far away from the laser medium, of the second end cap.
In one embodiment, the laser medium is a laser crystal, a laser ceramic, or a single crystal fiber.
In one embodiment, the host crystal of the laser medium is one of a yttrium vanadate crystal, a yttrium aluminum garnet crystal, a KGW crystal, a KYW crystal, a calcium fluoride crystal and a quartz crystal;
the yttrium vanadate crystal is doped with Nd3+、Yb3+、Er3+、Tm3+、Ho3+At least one of (a).
In an embodiment, the first end cap and the second end cap are made of a glass material which is the same as the material of the host crystal of the laser medium.
In one embodiment, the first end cap and the second end cap are both connected to the end face of the laser medium through a diffusion bonding process by means of optical cement phenomenon.
In an embodiment, the fiber-coupled crystal structure further comprises a cladding layer and a heat sink;
the cladding layer is wrapped outside the first end cap, the laser medium and the second end cap and is contained in the heat sink.
In one embodiment, the cladding layer is an indium foil.
An embodiment of the present application further provides a gain device, where the gain device includes: the optical fiber coupling device comprises a first beam combiner, a second beam combiner, a first signal optical fiber, a second signal optical fiber, a first pumping optical fiber, a second pumping optical fiber and the optical fiber coupling crystal structure;
the first combiner and the second combiner are respectively connected with the first tail fiber and the second tail fiber;
the first signal fiber and the first pump fiber are both connected with the first beam combiner;
and the second signal optical fiber and the second pump optical fiber are both connected with the second beam combiner.
In an embodiment, the first beam combiner and the second beam combiner are micro-optical beam combiners or tapered beam combiners.
In an embodiment, the first beam combiner is configured to combine the signal light transmitted by the first signal fiber and the pump light transmitted by the first pump fiber and transmit the combined light to the fiber coupling crystal structure, the fiber coupling crystal structure is configured to gain the signal light, the gained signal light is output by the second signal fiber through the second beam combiner, and the remaining pump light is output by the second pump fiber through the second beam combiner.
In an embodiment, the first beam combiner is configured to transmit the signal light transmitted by the first signal fiber to the fiber-coupled crystal structure, the second beam combiner is configured to transmit the pump light transmitted by the second pump fiber to the fiber-coupled crystal structure, the signal light is gained by the pump light in the fiber-coupled crystal structure, the gained signal light is output by the second signal fiber via the second beam combiner, and the remaining pump light is output by the first pump fiber via the first beam combiner.
This application is to space light path among the prior art bulky, the installation is complicated and output light is complicated, and optic fibre and laser crystal are difficult to the problem of direct butt fusion and make the improved design, have following beneficial effect:
1. the optical fiber is welded to the end cap through the end cap, the end cap is connected to the laser medium, and the connection between the optical fiber and the laser medium is realized through the end cap as an intermediate medium;
2. the output of signal light is realized by using the optical fiber in the solid laser, and the output light is simpler;
this application structure is succinct, utilizes the end cap as intermediate medium, has realized utilizing optic fibre to laser crystal transmission signal light in solid laser, has improved the transmission efficiency of signal light, has reduced the complexity of exporting light simultaneously, and the practicality is strong.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a transmission structure of spatial light in a solid-state laser in the prior art.
Fig. 2 is a schematic structural diagram of a fiber-coupled crystal structure according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a gain device according to an embodiment of the present application.
The designations in the figures mean:
11. a first pigtail; 12. a first end cap; 13. a laser medium; 14. a second end cap; 15. a second pigtail; 16. a heat sink;
2. a first signal fiber; 3. a first pump fiber; 4. a first combiner; 5. a second signal fiber; 6. a second pump fiber; 7. and a second combiner.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings, which are examples. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the patent. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.
To explain the technical solutions of the present application, the following description is made with reference to specific drawings and examples.
The embodiment of the application provides an optical fiber coupling crystal structure, utilizes the end cap as the intermediate medium between tail optical fiber and the laser medium for signal light can pass through optic fibre input laser medium, and can make the signal light that the laser medium jetted out export through the tail optical fiber, has reduced the complexity of output signal light.
Example one
Referring to fig. 1 and fig. 2, a fiber-coupled crystal structure according to an embodiment of the present invention includes a first pigtail 11, a first end cap 12, a laser medium 13, a second end cap 14, and a second pigtail 15.
One end of the first end cap 12 is connected with a first tail fiber 11, and the other end is connected with a laser medium 13; one end of the second end cap 14 is connected with a second tail fiber 15, and the other end is connected with the laser medium 13; first and second end caps 12 and 14 are located at opposite ends of the laser medium 13, respectively.
The signal light at the front stage enters the first end cap 12 through the first pigtail 11, sequentially passes through the first end cap 12, the laser medium 13 and the second end cap 14, then enters the second pigtail 15 and is output through the second pigtail 15.
Referring to fig. 1, in the prior art, signal light in a solid-state laser is transmitted in air, that is, spatial light, and in the process of transmitting the spatial light, conditions such as attenuation of an optical signal and optical signal drift are likely to occur, and an additional device is required to maintain the intensity and stability of the optical signal.
Compared with the spatial light transmission in the prior art, the embodiment has the advantages that: set up first end cap 12 and second end cap 14 at laser medium 13 both ends to connect first pigtail 11 and second pigtail 15 respectively at the other end of first end cap 12 and second end cap 14, make laser medium 13 can link to each other with optic fibre through first end cap 12, second end cap 14, realize the flexible optical fiber transmission of signal light, the decay of signal light has been reduced, the stability of signal light transmission has been guaranteed, simultaneously convenient and other optical fiber device flexonics, space occupation has been reduced.
Optionally, the fiber-coupled crystal structure provided in this embodiment is used in a solid-state laser, so the laser medium 13 may be a laser crystal, laser ceramic, or a single-crystal fiber.
Further, the host crystal of the laser medium 13 may be a yttrium vanadate crystal, and at least Nd is doped in the yttrium vanadate crystal3+、Yb3+、Er3+、Tm3+、Ho3+One kind of (1).
The laser medium 13 may be one of an yttrium aluminum garnet crystal, a KGW crystal, a KYW crystal, a calcium fluoride crystal, and a quartz crystal.
In one embodiment, the material of the first end cap 12 is the same glass material as the material of the host crystal of the laser medium 13, and since the glass is made of a plurality of inorganic minerals as the main raw material, the material of the first end cap 12 is glass and the main raw material of the glass is the same as the material of the host crystal of the laser medium 13.
The second end cap 14 is made of the same material as the first end cap 12.
Because the arrangement of the first end cap 12 and the second end cap 14 is mainly used as the intermediate medium between the first pigtail 11, the second pigtail 15 and the laser medium 13, so that the first pigtail 11 and the second pigtail 15 can be connected with the laser medium 13, and the transmission of the optical signal is realized, the first end cap 12 and the second end cap 14 are arranged to be glass, the optical signal cannot drift or other changes in the first end cap 12 and the second end cap 14, and the influence of the first end cap 12 and the second end cap 14 on the optical signal in the optical signal transmission process is reduced.
The first tail fiber 11 is welded to the first end cap 12, the second tail fiber 15 is welded to the second end cap 14, the first end cap 12 and the second end cap 14 are made of glass, the optical fiber is convenient to weld to the glass, and the glass cannot be damaged in the welding process.
The beneficial effect of this embodiment lies in: specific materials of the first end cap 12 and the second end cap 14 are provided, so that the first tail fiber 11 and the second tail fiber 15 can be respectively welded to the first end cap 12 and the second end cap 14, and the first end cap 12 and the second end cap 14 cannot be damaged.
Alternatively, the material of the first end cap 12 may be selected from other glass materials with a low melting point close to the host crystal thermal conductivity of the laser medium 13.
Optionally, the first end cap 12 and the second end cap 14 are both connected to the laser medium 13 through a diffusion bonding process by a photo-glue phenomenon, wherein the photo-glue phenomenon means that the two surfaces are tightly attached together after surface treatment such as polishing, and form a tight attachment connection at room temperature; then, the first end cap 12, the second end cap 14 and the laser medium 13 are subjected to heat treatment, and stable bonding is realized through a thermal diffusion bonding technology, and permanent bonding is formed without other adhesives, so that the mode has little influence on optical signal transmission, and the bonding is stable.
Referring to FIG. 2, in one embodiment, the fiber-coupled crystal structure further includes a cladding layer and a heat sink 16.
The first end cap 12, the laser medium 13 and the second end cap 14 are coated into a whole by the coating layer and are arranged in the heat sink 16; the first pigtail 11 and the second pigtail 15 extend out of the heat sink 16 through the cladding and the heat sink 16, and the heat sink 16 is used for assisting heat dissipation and preventing the laser medium 13 from overheating.
Optionally, the material of the cladding layer is made of indium foil.
The beneficial effects of the first embodiment of the application are that:
1. by arranging the end cap, the optical fiber is welded on the end cap, the end cap is connected to the laser medium 13, and the connection between the optical fiber and the laser medium 13 is realized by taking the end cap as an intermediate medium;
2. the output of signal light is realized by using the optical fiber in the solid laser, and the output of light is simpler;
3. a cladding and mounting scheme for the end cap and laser medium 13 is provided to place the fiber coupled crystal structure within the heat sink 16 to facilitate heat dissipation.
Example two
Referring to fig. 3, on the basis of the first embodiment, a second embodiment of the present application provides a gain device, which is applied to the fiber-coupled crystal structure of the first embodiment, and includes a first beam combiner 4, a second beam combiner 7, a first signal fiber 2, a second signal fiber 5, a first pump fiber 3, a second pump fiber 6, and a fiber-coupled crystal structure.
The first signal fiber 2 is used for inputting the signal light of the front stage to the first beam combiner 4, the first pump fiber 3 is used for inputting the first pump light to the first beam combiner 4, and the signal light and the first pump light enter the laser medium 13 after being combined by the first beam combiner 4.
The signal light gained by the laser medium 13 is output from the second signal fiber 5 after passing through the second beam combiner 7, and the remaining pump light is output from the second pump fiber 6 after entering the second beam combiner 7 from the laser medium 13.
The first combiner 4 and the second combiner 7 are respectively connected with the first tail fiber 11 and the second tail fiber 15; the first signal fiber 2 and the first pump fiber 3 are both connected with a first beam combiner 4; the second signal fiber 5 and the second pump fiber 6 are both connected with a second beam combiner 7.
The beneficial effect of this embodiment lies in: the specific structure of the laser gain equipment is provided, the beam combiner is used for replacing a dichroic mirror and a pumping lens, the space occupation of the gain equipment is reduced, the installation is simple, and the output signal light is flexibly output by the optical fiber.
Optionally, the first beam combiner 4 and the second beam combiner 7 are micro-optical beam combiners or tapered beam combiners.
EXAMPLE III
The present embodiment provides a propagation optical path of a signal light in a gain device, where a first beam combiner 4 is configured to combine the signal light transmitted by a first signal fiber 2 and a pump light transmitted by a first pump fiber 3, and transmit the combined light to a fiber coupling crystal structure.
The fiber coupled crystal structure is used for gaining signal light.
The signal light after gain is output by the second signal fiber 5 through the second beam combiner 7, and the remaining pumping light is output by the second pumping fiber 6 through the second beam combiner 7.
The optical path of the signal light in the gain device is as follows:
the signal light is input from the first signal optical fiber 2, sequentially transmitted to the first beam combiner 4, the laser medium 13 and the second beam combiner 7, and output through the second signal optical fiber 5.
The optical path of the pump light in the gain device is as follows:
the pump light is input from the first pump optical fiber 3, is sequentially transmitted to the first beam combiner 4, the laser medium 13 and the second beam combiner 7, and is output through the second pump optical fiber 6;
the signal light is gained by the pump light in the laser medium 13, and the gained signal light is output from the second signal optical fiber 5 after passing through the second beam combiner 7; the remaining pump light after the signal light gain is output from the second pump fiber 6 through the second beam combiner 7.
That is, in this embodiment, the first beam combiner 4 plays a role of combining the signal light and the pump light, and the second beam combiner 7 plays a role of splitting the gained signal light and the remaining pump light.
The present embodiment provides a positive pump gain scheme for pump light versus signal light.
Alternatively, the pump light remaining after the signal light gain may be directly output as the spatial light without being output through the second pump fiber 6.
Example four
The present embodiment provides a propagation optical path of signal light in a gain device, wherein a first beam combiner 4 is used for transmitting the signal light transmitted by a first signal fiber 2 to a fiber coupling crystal structure.
The second beam combiner 7 is used for transmitting the pump light transmitted by the second pump fiber 6 to the fiber-coupled crystal structure.
The signal light is gained by the pump light in the optical fiber coupling crystal structure, the gained signal light is output by the second signal optical fiber 5 through the second beam combiner 7, and the rest pump light is output by the first pump optical fiber 3 through the first beam combiner 4.
The optical path of the signal light in the gain device is as follows:
the signal light is input from the first signal optical fiber 2, sequentially transmitted to the first beam combiner 4, the laser medium 13 and the second beam combiner 7, and output through the second signal optical fiber 5.
The optical path of the pump light in the gain device is as follows:
the pump light is input from the second pump optical fiber 6, sequentially transmitted to the second beam combiner 7, the laser medium 13 and the first beam combiner 4, and output through the first pump optical fiber 3.
The signal light is gained by the pump light in the laser medium 13, and the gained signal light is output from the second signal optical fiber 5 after passing through the second beam combiner 7; the pumping light left after the signal light gain is output from the first pumping optical fiber 3 after passing through the first beam combiner 4.
The present embodiment provides an anti-pump gain scheme for pump light to signal light.
Alternatively, the pump light remaining after the signal light gain may be directly output as the spatial light without being output through the first pump fiber 3.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. An optical fiber coupling crystal structure is characterized by comprising a first tail fiber (11), a first end cap (12), a laser medium (13), a second end cap (14) and a second tail fiber (15);
the first end cap (12) and the second end cap (14) are respectively connected to two opposite sides of the laser medium (13), one end of the first tail fiber (11) is connected to one side, away from the laser medium (13), of the first end cap (12), and one end of the second tail fiber (15) is connected to one side, away from the laser medium (13), of the second end cap (14).
2. The fiber-coupled crystal structure of claim 1, wherein the lasing medium (13) is a laser crystal, a laser ceramic, or a single crystal fiber.
3. The fiber-coupled crystal structure of claim 2, wherein the host crystal of the laser medium (13) is one of a yttrium vanadate crystal, an yttrium aluminum garnet crystal, a KGW crystal, a KYW crystal, a calcium fluoride crystal, and a quartz crystal;
the yttrium vanadate crystal is doped with Nd3+、Yb3+、Er3+、Tm3+、Ho3+At least one of (1).
4. The fiber-coupled crystal structure of claim 3, wherein the first end cap (12) and the second end cap (14) are made of a glass material that is the same as the material of the host crystal of the laser medium (13).
5. The fiber-coupled crystal structure according to any of claims 1-4, wherein the first end cap (12), the second end cap (14) are each connected to the end face of the laser medium (13) by a diffusion bonding process by optical glue phenomenon.
6. The fiber coupling crystal structure according to any of claims 1-4, further comprising a cladding layer and a heat sink (16);
the cladding layer is coated outside the first end cap (12), the laser medium (13) and the second end cap (14) and is contained in the heat sink (16).
7. A gain apparatus, comprising: -a first combiner (4), -a second combiner (7), -a first signal fiber (2), -a second signal fiber (5), -a first pump fiber (3), -a second pump fiber (6) and-a fiber coupled crystal structure according to any of claims 1-6;
the first combiner (4) and the second combiner (7) are respectively connected with the first tail fiber (11) and the second tail fiber (15);
the first signal fiber (2) and the first pump fiber (3) are both connected with the first beam combiner (4);
and the second signal fiber (5) and the second pump fiber (6) are both connected with the second beam combiner (7).
8. The gain device according to claim 7, wherein the first (4) and second (7) beam combiners are micro-optical or tapered beam combiners.
9. The gain apparatus according to claim 7 or 8, wherein the first beam combiner (4) is configured to combine the signal light transmitted by the first signal fiber (2) and the pump light transmitted by the first pump fiber (3) and transmit the combined light to the fiber coupling crystal structure, the fiber coupling crystal structure is configured to gain the signal light, the gained signal light is output from the second signal fiber (5) through the second beam combiner (7), and the remaining pump light is output from the second pump fiber (6) through the second beam combiner (7).
10. The gain apparatus according to claim 7 or 8, wherein the first beam combiner (4) is configured to transmit the signal light transmitted by the first signal fiber (2) to the fiber-coupled crystal structure, the second beam combiner (7) is configured to transmit the pump light transmitted by the second pump fiber (6) to the fiber-coupled crystal structure, the signal light is gained by the pump light in the fiber-coupled crystal structure, the gained signal light is output from the second signal fiber (5) through the second beam combiner (7), and the rest of the pump light is output from the first pump fiber (3) through the first beam combiner (4).
CN202210287263.XA 2022-03-23 2022-03-23 Optical fiber coupling crystal structure and gain device Pending CN114678759A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210287263.XA CN114678759A (en) 2022-03-23 2022-03-23 Optical fiber coupling crystal structure and gain device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210287263.XA CN114678759A (en) 2022-03-23 2022-03-23 Optical fiber coupling crystal structure and gain device

Publications (1)

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CN114678759A true CN114678759A (en) 2022-06-28

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CN202210287263.XA Pending CN114678759A (en) 2022-03-23 2022-03-23 Optical fiber coupling crystal structure and gain device

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