Research status of large mode area single polarization active fiber

Chun Xiao; Ge Zhang; Bin-hua Yang; Wei-feng Cheng; Shao-yi Gu

doi:10.1117/12.2317536

5 March 2018 Research status of large mode area single polarization active fiber

Chun Xiao, Ge Zhang, Bin-hua Yang, Wei-feng Cheng, Shao-yi Gu

Proceedings Volume 10710, Young Scientists Forum 2017; 107103R (2018) https://doi.org/10.1117/12.2317536
Event: Young Scientists Forum 2017, 2017, Shanghai, China

Abstract

As high power fiber laser used more and more widely, to increase the output power of fiber laser and beam quality improvement have become an important goal for the development of high power fiber lasers. The use of large mode fiber is the most direct and effective way to solve the nonlinear effect and fiber damage in the fiber laser power lifting process. In order to reduce the effect of polarization of the fiber laser system, the study found that when introduces a birefringence in the single-mode fiber, the polarization state changes caused by the birefringence is far greater than the random polarization state changes, then the external disturbance is completely submerged, finally the polarization can be controlled and stabilized. Through the fine design of the fiber structure, if the birefringence is high enough to achieve the separation of the two polarization states, the fiber will have a different cut-off mechanism to eliminate polarization which is not need, which will realize single mode single polarization transmission in a band. In this paper, different types of single polarization fiber design are presented and the application of these fibers are also discussed.

Citation Download Citation

Chun Xiao, Ge Zhang, Bin-hua Yang, Wei-feng Cheng, and Shao-yi Gu "Research status of large mode area single polarization active fiber", Proc. SPIE 10710, Young Scientists Forum 2017, 107103R (5 March 2018); https://doi.org/10.1117/12.2317536

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KEYWORDS

Polarization

Birefringence

Cladding

Fiber lasers

Refractive index

Doping

Optical fibers

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