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CN-122000775-A - Self-injection locking distributed feedback single-frequency optical fiber laser

CN122000775ACN 122000775 ACN122000775 ACN 122000775ACN-122000775-A

Abstract

The invention discloses a self-injection locking distributed feedback single-frequency optical fiber laser, which belongs to the technical field of single-frequency optical fiber lasers and comprises a laser body and an optical fiber jumper, wherein an interface is arranged on the side wall of the laser body, the optical fiber jumper is matched with the interface, a cleaning box is arranged outside the interface, a cleaning cavity is arranged in the cleaning box, two ends of the cleaning cavity are respectively arranged in an open mode, the optical fiber jumper and the interface respectively extend into the cleaning cavity, a moving hole is formed in the side wall of the cleaning box, a moving block is connected in the moving hole in a sliding mode, a working cavity is formed in the moving block, and a handle is arranged on the side wall of the moving block. According to the invention, the cleaning box is arranged at the interface position of the laser body, so that the interface of the laser body and the optical fiber jumper can be cleaned at the same time, the cleaning efficiency is improved, and the performance of the self-injection locking distributed feedback single-frequency optical fiber laser is improved.

Inventors

  • JIANG LIYUAN
  • LIU JIA
  • LIU MINZHE
  • ZHAO KUN
  • ZHAI RUIZHAN
  • MA XINQIANG
  • ZHANG ZHENZHEN

Assignees

  • 山东省科学院激光研究所

Dates

Publication Date
20260508
Application Date
20260212

Claims (10)

  1. 1. The self-injection locking distributed feedback single-frequency optical fiber laser comprises a laser body (1) and an optical fiber jumper wire (2), wherein an interface (3) is arranged on the side wall of the laser body (1), the optical fiber jumper wire (2) is matched with the interface (3), the self-injection locking distributed feedback single-frequency optical fiber laser is characterized in that a cleaning box (4) is arranged outside the interface (3), a cleaning cavity is formed in the cleaning box (4), two ends of the cleaning cavity are both open, the optical fiber jumper wire (2) and the interface (3) respectively extend into the cleaning cavity, a motion hole (5) is formed in the side wall of the cleaning box (4), a motion block (6) is connected in a sliding manner in the motion hole (5), a working cavity is formed in the motion block (6), a grip (7) is arranged on the side wall of the motion block (6), a rotating shaft (8) is fixedly connected with a main bevel gear (9) through the side wall of the motion block (6), two bevel gears (10) are further arranged in the working cavity, two bevel gears (10) are respectively meshed with the two bevel gears (10) and the two bevel gears (11) are respectively meshed with the middle bevel gears (12) and the two bevel gears (11) are respectively meshed with the middle part of the threaded rod (12), a top block (14) is fixedly arranged at the other end of the middle rod (13), and opposite inner assemblies and opposite outer assemblies are respectively arranged on the side walls of the two top blocks (14); Corresponding cleaning openings (15) are respectively formed in the side walls of two sides of the moving block (6), the sizes of the cleaning openings (15) are inconsistent, shielding pieces (16) are respectively arranged outside the cleaning openings (15), the shielding pieces (16) are provided with moving magnetic pieces (17) facing the side walls of one side of the moving block (6), and shielding magnetic pieces (18) and vertical magnetic pieces (19) are respectively arranged on the side walls of two sides of the moving block (6).
  2. 2. The self-injection locking distributed feedback single-frequency fiber laser according to claim 1, wherein a telescopic groove (20) is formed in the top of the cleaning cavity, a pressing plate (21) is arranged in the telescopic groove (20), the bottom of the pressing plate (21) abuts against the top of the moving block (6), and a telescopic piece (22) is arranged between the pressing plate (21) and the telescopic groove (20).
  3. 3. The self-injection locking distributed feedback single-frequency fiber laser according to claim 1, wherein blocking blocks (23) are respectively arranged on side walls of two sides of the cleaning cavity, the blocking blocks (23) and the shielding pieces (16) are positioned on the same horizontal plane, one end of each shielding piece (16) facing each blocking block (23) is arc-shaped, and the blocking blocks (23) are obliquely arranged.
  4. 4. The self-injection locking distributed feedback single-frequency fiber laser according to claim 1, wherein the pair of inner components comprises a push cylinder (24) and a fixed rod (25), one end of the push cylinder (24) is rotationally connected with the side wall of the top block (14), a cleaning groove (26) is formed in the other end of the push cylinder (24), a first arc-shaped groove (27) is formed in the side wall of the push cylinder (24), the fixed rod (25) is fixedly arranged in the working cavity, the fixed rod (25) is slidably connected with the inner wall of the first arc-shaped groove (27), and one end, far away from the top block (14), of the push cylinder (24) is aligned with the corresponding cleaning opening (15).
  5. 5. The self-injection locking distributed feedback single-frequency optical fiber laser according to claim 1, wherein the external component comprises a push pin (28), a driving rod (29) and a fixed cylinder (30), the fixed cylinder (30) is fixedly arranged in the working cavity, the longitudinal section of the fixed cylinder (30) is in a downward opening arc shape, the push pin (28), the driving rod (29) and the top block (14) are all located in the fixed cylinder (30), the push pin (28) is rotationally connected with the side wall of the top block (14), one end of the push pin (28) is aligned with the cleaning port (15), the driving rod (29) is fixedly connected with one end of the push pin (28) away from the cleaning port (15), a second arc-shaped groove (31) is formed in the inner wall of the fixed cylinder (30), and the driving rod (29) is slidingly connected with the inner wall of the second arc-shaped groove (31).
  6. 6. The self-injection locking distributed feedback single-frequency fiber laser according to claim 3, wherein a sliding rod (32) is fixedly connected to the side wall of the blocking block (23), a sliding groove (33) is formed in the side wall of the cleaning cavity, and the sliding rod (32) is slidably connected with the inner wall of the sliding groove (33).
  7. 7. The self-injection locking distributed feedback single-frequency fiber laser according to claim 1, wherein a rotating rod (34) is fixedly arranged on the side wall of the shielding piece (16), the rotating rod (34) penetrates through the side wall of the working cavity, two vertical blocks (35) are arranged at the bottom of the working cavity, the rotating rod (34) is rotationally connected with the side wall of the vertical blocks (35), a one-way bearing (36) is arranged in the vertical blocks (35), and a connecting rod (37) is arranged at the other end of the one-way bearing (36).
  8. 8. The self-injection locking distributed feedback single-frequency fiber laser according to claim 7, wherein a worm (38) is arranged at one end of the connecting rod (37) far away from the one-way bearing (36), a worm wheel (40) is rotationally connected to the working cavity, a bottom gear (41) is fixedly connected to the side wall of the worm wheel (40), the worm wheel (40) is meshed with the worm (38), two rotary drums (42) are rotationally connected to the side wall of the working cavity, top gears (43) are fixedly connected to the side walls of the two rotary drums (42), the bottom gear (41) is meshed with the two top gears (43), superfine cleaning cloth (44) is jointly wound between the two rotary drums (42), a rotary cavity (45) is formed in the side wall of the moving block (6), the superfine cleaning cloth (44) is wound to the side wall of the other rotary drum (42) from the side wall of the rotary drum (42) through the rotary cavity (45), and the rotary cavity (45) is communicated with the two cleaning ports (15).
  9. 9. The self-injection locked distributed feedback single frequency fiber laser of claim 8, wherein two of said drums (42) are at the same height, said inner pair of modules are also at the same height as the outer pair of modules, and the height of said drums (42) is greater than the height of the inner pair of modules.
  10. 10. The self-injection locking distributed feedback single frequency fiber laser according to claim 7, wherein the shielding magnetic sheet (18) is located at one side of the cleaning opening (15), the height of the shielding magnetic sheet (18) is consistent with that of the cleaning opening (15), and the vertical magnetic sheet (19) is located right above the rotating rod (34).

Description

Self-injection locking distributed feedback single-frequency optical fiber laser Technical Field The invention belongs to the technical field of single-frequency fiber lasers, and particularly relates to a self-injection locking distributed feedback single-frequency fiber laser. Background The self-injection locking distributed feedback single-frequency optical fiber laser is a high-performance optical fiber laser combining a Distributed Feedback (DFB) structure and a self-injection locking technology. The core aim is to realize single-frequency laser output with ultra-narrow linewidth, high frequency stability and low phase noise, and the method is suitable for the fields of precision measurement, optical communication, spectroscopy and the like. The self-injection locking design avoids the complexity of introducing an additional coupler at the output end in the traditional method, improves the system efficiency, and the Distributed Feedback (DFB) realizes the 'distributivity' and 'selectivity' of optical feedback by introducing a periodic structure into a gain medium, thereby stably outputting single longitudinal mode laser. In the use process of the self-injection locking Distributed Feedback (DFB) single-frequency optical fiber laser, the DFB single-frequency optical fiber laser needs to be installed on a stable platform, then the laser is connected with application equipment through an optical fiber jumper, in order to ensure the transmission performance of the laser, an output port of the laser and an optical fiber end face of the laser are preferably cleaned respectively before the optical fiber jumper is connected, but the output port and the optical fiber end face are cleaned separately, so that when one place is cleaned and the other place is cleaned, the cleaned place is required to be sealed by a dust plug, the dust plug is removed when the other place is cleaned, and then the dust plug is connected. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a self-injection locking distributed feedback single-frequency optical fiber laser. The technical scheme adopted for solving the technical problems is as follows: The utility model provides a self-injection locking distributed feedback single-frequency fiber laser, includes laser body and fiber jumper, laser body lateral wall is provided with the interface, fiber jumper and interface phase-match, the interface external mounting has the cleaning box, set up clean chamber in the cleaning box, clean chamber both ends are open setting, fiber jumper and interface stretch into in the clean chamber respectively, the motion hole has been seted up to the cleaning box lateral wall, sliding connection has the motion piece in the motion hole, set up the working chamber in the motion piece, the motion piece lateral wall is provided with the handle, handle lateral wall fixedly connected with pivot, the pivot passes motion piece lateral wall and fixedly connected with main bevel gear, still install two side bevel gears in the working chamber, two side bevel gears all mesh with main bevel gear, two side bevel gears lateral wall all fixedly provided with threaded rod, threaded connection has the motion ring on the threaded rod, the motion ring top is provided with the intermediate lever, the intermediate lever other end fixedly provided with top piece, two top piece lateral wall are provided with the handle, two top piece lateral wall are provided with the opposite inner subassembly and outer subassembly respectively; Corresponding cleaning openings are respectively formed in the side walls of two sides of the moving block, the sizes of the two cleaning openings are inconsistent, shielding sheets are arranged outside the cleaning openings, moving magnetic sheets are arranged on the side walls of one side of the shielding sheets facing the moving block, and shielding magnetic sheets and vertical magnetic sheets are respectively arranged on the side walls of two sides of the moving block. Through above-mentioned technical scheme, through setting up clean box in the interface position department of laser instrument body, can clean the interface and the optical fiber jumper wire of laser instrument body simultaneously, improved clean efficiency to improve the performance of self-injection locking distributed feedback single frequency fiber laser. Further, the cleaning cavity top is provided with the expansion tank, be provided with the clamp plate in the expansion tank, clamp plate bottom and motion piece top are supported and are propped, be provided with the extensible member between clamp plate and the expansion tank. Through the technical scheme, the telescopic piece in the telescopic groove can ensure that the pressing plate always keeps against the state of the moving block, and the telescopic piece can be set into a spring or other accessories with telescopic capacity, such as a telescopic rod, and the like, and can be