Over 400 W graded-index fiber Raman laser with brightness enhancement

Chenchen Fan, Yizhu Chen, Tianfu Yao, Hu Xiao, Jiangming Xu, Jinyong Leng, Pu Zhou, Alexey A. Wolf, Ilya N. Nemov, Alexey G. Kuznetsov, Sergey I. Kablukov, Sergey A. Babin

Research output: Contribution to journalArticlepeer-review


The power scaling on all-fiberized Raman fiber oscillator with brightness enhancement (BE) based on multimode graded-index (GRIN) fiber is demonstrated. Thanks to beam cleanup of GRIN fiber itself and single-mode selection properties of the fiber Bragg gratings inscribed in the center of GRIN fiber, the efficient BE is realized. For the laser cavity with single OC FBG, continuous-wave power of 334 W with an M2 value of 2.8 and BE value of 5.6 were obtained at a wavelength of 1120 nm with an optical-to-optical efficiency of 49.6%. Furthermore, the cavity reflectivity is increased by employing two OC FBGs to scale the output power up to 443 W, while the corresponding M2 is 3.5 with BE of 4.2. To our best knowledge, it is the highest power in Raman oscillator based on GRIN fiber.

Original languageEnglish
Pages (from-to)19441-19449
Number of pages9
JournalOptics Express
Issue number13
Publication statusPublished - 21 Jun 2021


  • 1.03.SY OPTICS


Dive into the research topics of 'Over 400 W graded-index fiber Raman laser with brightness enhancement'. Together they form a unique fingerprint.

Cite this