CN216869962U - Optical fiber coupler test fixture - Google Patents
Optical fiber coupler test fixture Download PDFInfo
- Publication number
- CN216869962U CN216869962U CN202122880238.6U CN202122880238U CN216869962U CN 216869962 U CN216869962 U CN 216869962U CN 202122880238 U CN202122880238 U CN 202122880238U CN 216869962 U CN216869962 U CN 216869962U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- substrate
- coupler
- output
- fiber coupler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Lasers (AREA)
Abstract
The utility model belongs to the technical field of optical fibers, and discloses an optical fiber coupler test tool which comprises a first substrate, a second substrate, a third substrate, an output optical isolator and a gain optical fiber, wherein the first substrate is provided with an optical fiber coupler and an online optical isolator; the second substrate is provided with a laser seed source and two pumping light sources, an output optical fiber of the laser seed source is welded to an input tail fiber of the online optical isolator, an output tail fiber of the online optical isolator is welded to a first signal input optical fiber of the optical fiber coupler, and pumping output tail fibers of the two pumping light sources are respectively welded to two coupler input tail fibers of the optical fiber coupler; the third substrate is provided with a mounting position for mounting the optical fiber coupler to be tested; one end of the gain fiber is welded to the coupler output tail fiber of the fiber coupler, and the other end of the gain fiber can be welded to the isolator tail fiber of the output optical isolator or the second signal input fiber of the fiber coupler to be tested. The performance of the optical fiber coupler to be detected can be detected, and the yield is improved.
Description
Technical Field
The utility model belongs to the technical field of optical fibers, and particularly relates to an optical fiber coupler testing tool.
Background
With the rapid development and maturation of optical fiber technology, the characteristics and advantages of fiber lasers are gradually recognized, fiber lasers are increasingly widely applied in the fields of national defense, industrial processing, medical treatment and the like, the market demand and the application are increased year by year, and the requirements on the quality and the reliability of the fiber lasers are gradually increased.
The optical fiber coupler is one of core devices of an optical fiber laser, is one of the most effective optical fiber coupling devices at present, can efficiently couple the light energy of the laser into one optical fiber for transmission, and has a wide range of power use. Therefore, the performance of the optical fiber coupler needs to be detected, but at present, the performance of the optical fiber coupler lacks a necessary detection tool, so that the yield of the optical fiber coupler is low.
Therefore, a testing tool for an optical fiber coupler is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide an optical fiber coupler testing tool to realize the detection of the performance of an optical fiber coupler and improve the yield. In order to achieve the above object, the present application provides an optical fiber coupler testing tool, including:
a first substrate on which a fiber coupler and an in-line optical isolator are disposed;
the second substrate is provided with a laser seed source and two pumping light sources, an output optical fiber of the laser seed source is welded to an input tail fiber of the online optical isolator, an output tail fiber of the online optical isolator is welded to a first signal input optical fiber of the optical fiber coupler, and pumping output tail fibers of the two pumping light sources are respectively welded to two coupler input tail fibers of the optical fiber coupler;
the third substrate is provided with a mounting position for mounting the optical fiber coupler to be tested;
an output optical isolator;
gain fiber, one end butt fusion in fiber coupler output tail fiber, the other end can be welded in output optical isolator's isolator tail fiber or the fiber coupler's that awaits measuring second signal input fiber, work as gain fiber welded in during the second signal input fiber, the fiber coupler's that awaits measuring signal output fiber can be welded in the isolator tail fiber.
As an optimal technical scheme of the optical fiber coupler testing tool, a first through hole for the seed source output optical fiber and the pumping output tail fiber to pass through is formed in the first substrate, and a second through hole for the seed source output optical fiber and the pumping output tail fiber to pass through is formed in the second substrate.
As an optimal technical scheme of the optical fiber coupler testing tool, a notch for the gain optical fiber to pass through is formed in the third substrate.
As a preferred technical solution of the fiber coupler testing tool, the first substrate is located between the second substrate and the third substrate.
As an optimal technical scheme of the optical fiber coupler testing tool, the laser seed source and the pumping light source are both located on one side, away from the first substrate, of the second substrate.
As an optimal technical scheme of the optical fiber coupler testing tool, the optical fiber coupler and the on-line optical isolator are both located on one side, away from the second substrate, of the first substrate.
As an optimal technical scheme of the optical fiber coupler testing tool, the gain optical fiber is wound by multiple circles, and the multiple circles of the gain optical fiber are attached to the first substrate.
As an optimal technical scheme of the optical fiber coupler testing tool, a fusion joint of an output tail fiber of the online optical isolator and the first signal input optical fiber, a fusion joint of a pump output tail fiber and the coupler input tail fiber and a fusion joint of the gain optical fiber and the coupler output tail fiber are fixedly arranged on the first substrate.
As an optimal technical scheme of the optical fiber coupler test tool, the first substrate, the second substrate and the third substrate are detachably connected.
As an optimal technical scheme of the optical fiber coupler test tool, the optical fiber coupler test tool further comprises a seed source control circuit board, a pumping control circuit board and a logic control circuit board which are all arranged on the second substrate, wherein the seed source control circuit board is connected to the laser seed source, the pumping control circuit board is connected to the two pumping light sources, and the logic control circuit board is connected to the seed source control circuit board and the pumping control circuit board.
Compared with the prior art, the utility model has the following beneficial effects:
when the optical fiber coupler to be tested needs to be detected, the testing tool for the optical fiber coupler to be tested fuses the second signal input optical fiber of the optical fiber coupler to be tested with the gain optical fiber, fuses the signal output optical fiber with the tail fiber of the isolator, starts the laser seed source and the two pump light sources, and obtains output power and beam quality M2Factor value, and output power and beam quality M measured when the gain fiber and the isolator pigtail are fusion spliced2And comparing the factor values to judge whether the optical fiber coupler to be detected is qualified or not, so that the performance of the optical fiber coupler to be detected can be detected, and the yield is improved.
Drawings
Fig. 1 is a schematic top view of a first substrate provided in this embodiment;
fig. 2 is a schematic top view of a second substrate provided in this embodiment;
fig. 3 is a first schematic top view of a third substrate provided in this embodiment;
fig. 4 is a second schematic top view of the third substrate provided in this embodiment.
Wherein:
1. a first substrate; 11. a fiber coupler; 111. a first signal input fiber; 112. a coupler input pigtail; 113. coupler output pigtails; 12. an in-line optical isolator; 121. inputting tail fibers; 122. outputting tail fibers; 13. a gain fiber; 101. a first through hole;
2. a second substrate; 21. a laser seed source; 211. an output optical fiber; 22. a pump light source; 221. pumping output pigtails; 23. a seed source control circuit board; 24. a pump control circuit board; 25. a logic control circuit board; 201. a second through hole;
3. a third substrate; 301. a notch; 302. an installation position;
4. an output optical isolator; 41. an isolator pigtail;
5. an optical fiber coupler to be tested; 51. a second signal input fiber; 52. a signal output fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1 to 4, the present embodiment provides an optical fiber coupler testing tool, which is mainly used for testing an optical fiber coupler to detect whether the performance of the optical fiber coupler is qualified. The optical fiber coupler test tool comprises a first substrate 1, a second substrate 2, a third substrate 3, an output optical isolator 4 and a gain optical fiber 13. The first substrate 1 is provided with a fiber coupler 11 and an in-line optical isolator 12. The second substrate 2 is provided with a laser seed source 21 and two pump light sources 22, an output fiber 211 of the laser seed source 21 is fused to an input pigtail 121 of the on-line optical isolator 12, an output pigtail 122 of the on-line optical isolator 12 is fused to a first signal input fiber 111 of the optical fiber coupler 11, and pump output pigtails 221 of the two pump light sources 22 are respectively fused to two coupler input pigtails 112 of the optical fiber coupler 11. The third substrate 3 is provided with a mounting position 302 for mounting the optical fiber coupler 5 to be tested. One end of the gain fiber 13 is welded to the coupler output pigtail 113 of the fiber coupler 11, and the other end of the gain fiber 13 can be welded to the isolator pigtail 41 of the output optical isolator 4 or the second signal input fiber 51 of the fiber coupler 5 to be tested, and when the gain fiber 13 is welded to the second signal input fiber 51, the signal output fiber 52 of the fiber coupler 5 to be tested can be welded to the isolator pigtail 41.
It will be appreciated that the performance of the fiber coupler 11 described above is certified. Through the fiber coupler testing tool, when the fiber coupler 5 to be tested needs to be detected, the fiber coupler 5 to be tested is installed at the installation position 302, the second signal input fiber 51 of the fiber coupler 5 to be tested is welded with the gain fiber 13, the signal output fiber 52 is welded with the isolator tail fiber 41 (as shown in fig. 4), the laser seed source 21 and the two pump light sources 22 are started, and the output power and the beam quality M are obtained2Factor value, and output power and beam quality M measured when gain fiber 13 is fused to isolator pigtail 41 (as shown in FIG. 3)2And comparing the factor values to judge whether the optical fiber coupler 5 to be tested is qualified or not, so that the performance of the optical fiber coupler 5 to be tested can be detected, the yield is improved, and the test difficulty is small. Moreover, the structure can be installed once and used for many times, is convenient to operate, and can avoid the dirt of each part caused by repeated assembly and disassembly.
Further, in this embodiment, the laser seed source 21 is a MOPA scheme pulsed laser seed source, and includes a laser output fiber, the central wavelength is 1064 ± 5nm, the output power is 0.2W-5W, the pulse width is 10 ns-500 ns, and the repetition frequency is not lower than 20 kHz. Further, the center wavelength of the pumping light source 22 is 915 nm. In addition, in this embodiment, the gain fiber 13 is an ytterbium-doped fiber.
Therefore, in the present embodiment, when the gain fiber 13 is fusion spliced with the isolator pigtail 41, the measured output power is 50W at the maximum, and the beam quality M2The factor value is 1-1.16. When the second signal input fiber 51 of the fiber coupler 5 to be tested is welded with the gain fiber 13 and the signal output fiber 52 is welded with the isolator pigtail 41, if the output power is not lower than 49.5W and the beam quality M is not lower than2If the factor value is not higher than 1.28, the fiber coupler 5 to be tested is qualified, otherwise, the fiber coupler is not qualified.
Of course, in other embodiments, the pump light source 22 may be a semiconductor pump source with a center wavelength of 915nm, and the laser seed source 21 may be a seed source of a Q-switching scheme. The pump light source 22 is a semiconductor pump source with a central wavelength of 975nm, and the laser seed source 21 is a seed source of a Q-switching scheme. Or the pump light source 22 is a semiconductor pump source with a central wavelength of 975nm, and the laser seed source 21 is a seed source of the MOPA scheme. Or the pump light source 22 is a semiconductor pump source with a central wavelength of 975nm, and the laser seed source 21 is a seed source of the MOPA scheme. Specifically, the seed source of the Q-switched scheme pumps the resonant cavity by adopting 915nm or 975nm pumping, and stable 1064nm pulse laser is generated when a certain condition is reached in the cavity due to a positive feedback mechanism in the cavity. The seed source of the MOPA scheme provides an electric pulse with an editable shape and adjustable repetition frequency for the 1064nm semiconductor laser through the FPGA control circuit, so that the 1064nm semiconductor laser can generate a pulse laser with the same shape as the electric pulse, the repetition frequency follows the ground frequency of the electric pulse, and the tuning can be flexible. Both the above Q-switched scheme and MOPA scheme are mature prior art and will not be described in detail here.
In the present embodiment, the fusion-splicing point between the output pigtail 122 of the line optical isolator 12 and the first signal input fiber 111, the fusion-splicing point between the pump output pigtail 221 and the coupler input pigtail 112, and the fusion-splicing point between the gain fiber 13 and the coupler output pigtail 113 are all fixed to the first substrate 1. Specifically, the fusion-splicing point of the output pigtail 122 of the line optical isolator 12 and the first signal input fiber 111 and the fusion-splicing point of the pump output pigtail 221 and the coupler input pigtail 112 are fixed on the first substrate 1 by high-refractive-index glue, and the fusion-splicing point of the gain fiber 13 and the coupler output pigtail 113 is fixed on the first substrate 1 by low-refractive-index glue. The fusion point of the gain optical fiber 13 and the isolator pigtail 41 is not fixed by glue, so that the gain optical fiber 13 and the isolator pigtail 41 can be conveniently disconnected. Similarly, the fusion point of the gain fiber 13 and the second signal input fiber 51 is not fixed by glue, so that the gain fiber 13 and the second signal input fiber 51 can be conveniently disconnected.
The first substrate 1 is positioned between the second substrate 2 and the third substrate 3. Further, the laser seed source 21 and the pump light source 22 are both located on a side of the second substrate 2 facing away from the first substrate 1. The fiber coupler 11 and the in-line optical isolator 12 are both located on the side of the first substrate 1 facing away from the second substrate 2.
Referring to fig. 1, in the present embodiment, the gain fiber 13 is wound with a plurality of turns, and the gain fiber 13 is attached to the first substrate 1. Specifically, the multi-turn gain fiber 13 is attached to the first substrate 1 by tinfoil. It will be appreciated that the turns of gain fiber 13 are located on the side of the first substrate 1 facing away from the second substrate 2.
Referring to fig. 2, the optical fiber coupler test fixture further includes a seed source control circuit board 23, a pumping source control circuit board 24 and a logic control circuit board 25, all of which are disposed on the second substrate 2, the seed source control circuit board 23 is connected to the laser seed source 21, the pumping control circuit board 24 is connected to the two pumping light sources 22, and the logic control circuit board 25 is connected to the seed source control circuit board 23 and the pumping control circuit board 24. The seed source control circuit board 23 performs drive control of pulse laser on the laser seed source 21, the pumping control circuit board 24 performs light emitting control on the two pumping light sources 22, and the logic control circuit board 25 realizes synchronous control on the pumping control circuit board 24 and the seed source control circuit board 23.
It should be noted that the logic control circuit board 25, the pumping control circuit board 24, and the seed source control circuit board 23 may be centralized or distributed controllers, for example, the controller may be a single-chip microcomputer or may be formed by a plurality of distributed single-chip microcomputers, and the single-chip microcomputers may run control programs.
Referring to fig. 1 to 3, the first substrate 1 is provided with a first through hole 101 through which the output fiber 211 and the pump output pigtail 221 pass, and the second substrate 2 is provided with a second through hole 201 through which the output fiber 211 and the pump output pigtail 221 pass. It will be appreciated that the output fiber 211 is fused to the input pigtail 121 of the in-line optical isolator 12 through the first and second vias 101 and 201, and the pump output pigtail 221 is fused to the coupler input pigtail 112 of the fiber coupler 11 through the first and second vias 101 and 201.
Further, the third substrate 3 is formed with a notch 301 through which the gain fiber 13 passes.
In order to facilitate the transportation of the optical fiber coupling test tool, the first substrate 1, the second substrate 2 and the third substrate 3 are detachably connected. Specifically, in this embodiment, the first substrate 1, the second substrate 2, and the third substrate 3 are fixed by bolts, so that the first substrate 1, the second substrate 2, and the third substrate 3 can be mounted and dismounted conveniently, and in other embodiments, the first substrate 1, the second substrate 2, and the third substrate 3 can be detachably connected by clamping or the like.
Further, in this embodiment, the first substrate 1, the second substrate 2, and the third substrate 3 are made of aluminum, but in other embodiments, the first substrate 1, the second substrate 2, and the third substrate 3 may be made of other metal materials.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an optical fiber coupler test fixture which characterized in that includes:
the optical fiber coupler comprises a first substrate (1) on which an optical fiber coupler (11) and an online optical isolator (12) are arranged;
the second substrate (2) is provided with a laser seed source (21) and two pumping light sources (22), an output optical fiber (211) of the laser seed source (21) is welded to an input tail fiber (121) of the online optical isolator (12), an output tail fiber (122) of the online optical isolator (12) is welded to a first signal input optical fiber (111) of the optical fiber coupler (11), and pumping output tail fibers (221) of the two pumping light sources (22) are respectively welded to two coupler input tail fibers (112) of the optical fiber coupler (11);
the third substrate (3) is provided with a mounting position (302) for mounting the optical fiber coupler (5) to be tested;
an output light isolator (4);
and the gain optical fiber (13) has one end welded to the coupler output tail fiber (113) of the optical fiber coupler (11) and the other end welded to the isolator tail fiber (41) of the output optical isolator (4) or the second signal input optical fiber (51) of the optical fiber coupler (5) to be tested, and when the gain optical fiber (13) is welded to the second signal input optical fiber (51), the signal output optical fiber (52) of the optical fiber coupler (5) to be tested can be welded to the isolator tail fiber (41).
2. The optical fiber coupler testing tool according to claim 1, wherein the first substrate (1) is provided with a first through hole (101) for the output optical fiber (211) and the pump output pigtail (221) to pass through, and the second substrate (2) is provided with a second through hole (201) for the output optical fiber (211) and the pump output pigtail (221) to pass through.
3. The optical fiber coupler testing tool according to claim 2, wherein a notch (301) for the gain optical fiber (13) to pass through is formed in the third substrate (3).
4. The fiber coupler test tool of claim 1, wherein the first substrate (1) is located between the second substrate (2) and the third substrate (3).
5. The fiber coupler testing tool according to claim 4, wherein the laser seed source (21) and the pump light source (22) are both located on a side of the second substrate (2) facing away from the first substrate (1).
6. The fiber coupler test tool of claim 5, wherein the fiber coupler (11) and the in-line optical isolator (12) are both located on a side of the first substrate (1) facing away from the second substrate (2).
7. The optical fiber coupler testing tool according to claim 1, wherein the gain optical fiber (13) is wound with a plurality of turns, and the gain optical fiber (13) is attached to the first substrate (1) with the plurality of turns.
8. The tool for testing the optical fiber coupler according to claim 1, wherein a fusion point of the output pigtail (122) of the in-line optical isolator (12) and the first signal input optical fiber (111), a fusion point of the pump output pigtail (221) and the coupler input pigtail (112), and a fusion point of the gain optical fiber (13) and the coupler output pigtail (113) are all fixedly arranged on the first substrate (1).
9. The fiber coupler test tool of claim 1, wherein the first substrate (1), the second substrate (2) and the third substrate (3) are detachably connected.
10. The optical fiber coupler test tool according to claim 1, further comprising a seed source control circuit board (23), a pumping control circuit board (24) and a logic control circuit board (25) which are all disposed on the second substrate (2), wherein the seed source control circuit board (23) is connected to the laser seed source (21), the pumping control circuit board (24) is connected to the two pumping light sources (22), and the logic control circuit board (25) is connected to the seed source control circuit board (23) and the pumping control circuit board (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122880238.6U CN216869962U (en) | 2021-11-23 | 2021-11-23 | Optical fiber coupler test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122880238.6U CN216869962U (en) | 2021-11-23 | 2021-11-23 | Optical fiber coupler test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216869962U true CN216869962U (en) | 2022-07-01 |
Family
ID=82127031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122880238.6U Active CN216869962U (en) | 2021-11-23 | 2021-11-23 | Optical fiber coupler test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216869962U (en) |
-
2021
- 2021-11-23 CN CN202122880238.6U patent/CN216869962U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101025539B (en) | Fiber laser beam processing apparatus | |
| US9190802B2 (en) | Optical fiber laser equipment | |
| JP5043316B2 (en) | Laser processing monitoring device | |
| WO2006041620A1 (en) | Stabilized frequency-converted laser system | |
| EP2616209A1 (en) | Industrial high power fiber laser system with optical monitoring assembly | |
| WO2014138399A1 (en) | Ultra high power single mode fiber laser system with non-uniformly configured fiber-to fiber rod multimode amplifier | |
| CN216869962U (en) | Optical fiber coupler test fixture | |
| CN107991061A (en) | High-capacity optical fiber laser QBH optical cable beam quality detecting systems and its detection method | |
| CN108225745A (en) | A kind of Double Cladding Ytterbium Doped Fiber laser slope efficiency test system and test method | |
| CN110190495A (en) | The high power single fiber of closed-loop control exports continuous full-optical-fiber laser system | |
| JP2012079966A (en) | Fiber laser processing device and laser diode power supply unit for excitation | |
| CN103794981A (en) | High energy hybrid thulium-doped pulse laser single-frequency amplifier | |
| KR102078144B1 (en) | Ultra high power single mode fiber laser system | |
| CN103438916B (en) | Based on the optical fiber grating wavelength demodulating equipment of saturable absorption optical fiber | |
| CN112713490A (en) | Intermediate infrared band continuous all-fiber oscillator | |
| JP6436963B2 (en) | Detection equipment, fiber laser, fiber laser system | |
| CN214040591U (en) | Fiber laser component burnout monitoring system | |
| CN212807565U (en) | Fiber laser and monitoring system thereof | |
| JP2010135687A (en) | Optical module | |
| CN112393879B (en) | Long-distance optical fiber detection system based on optical fiber random laser | |
| CN212875034U (en) | Optical fiber laser | |
| CN112051143B (en) | Multi-parameter automatic testing device for optical fiber end caps | |
| CN105305218A (en) | All solid state laser | |
| CN116539279B (en) | Measuring system and measuring method for absorption coefficient of cladding pumping light | |
| CN114122878B (en) | Laser, optical device and production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |