All fiber passively Q-switched laser

DWPI Title: All fiber passively Q-switched laser, has single laser cavity that is formed between first and second reflectors and output light beam of passes through first reflector that is positioned adjacent to large core doped gain fiber
Abstract: Embodiments relate to an all fiber passively Q-switched laser. The laser includes a large core doped gain fiber having a first end. The large core doped gain fiber has a first core diameter. The laser includes a doped single mode fiber (saturable absorber) having a second core diameter that is smaller than the first core diameter. The laser includes a mode transformer positioned between a second end of the large core doped gain fiber and a first end of the single mode fiber. The mode transformer has a core diameter that transitions from the first core diameter to the second core diameter and filters out light modes not supported by the doped single mode fiber. The laser includes a laser cavity formed between a first reflector positioned adjacent the large core doped gain fiber and a second reflector positioned adjacent the doped single mode fiber.
Use: All fiber passively Q-switched laser.
Advantage: The beam quality is enhanced when implementing a large core medium for a large output energy.
Novelty: The laser has a large core doped gain fiber (110) with two opposite ends. A mode transformer (120) is directly coupled to second end of large core doped gain fiber and to first end of a doped single mode fiber (130). A single laser cavity is formed between a first reflector (150) positioned adjacent to large core doped gain fiber and a second reflector (160) positioned adjacent to doped single mode fiber. An output light beam of all fiber passively Q-switched laser passes through first reflector.
Filed: 7/18/2012
Application Number: US13551762A
Tech ID: SD 11997.1
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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