3.96 kW All-Fiberized Linearly Polarized and Narrow Linewidth Fiber Laser with Near-Diffraction-Limited Beam Quality

Shuai Ren; Pengfei Ma; Wei Li; Guangjian Wang; Yisha Chen; Jiaxin Song; Wei Liu; Pu Zhou

doi:10.3390/nano12152541

3.96 kW All-Fiberized Linearly Polarized and Narrow Linewidth Fiber Laser with Near-Diffraction-Limited Beam Quality

Nanomaterials (Basel). 2022 Jul 24;12(15):2541. doi: 10.3390/nano12152541.

Authors

Shuai Ren¹, Pengfei Ma¹, Wei Li¹, Guangjian Wang¹, Yisha Chen¹, Jiaxin Song¹, Wei Liu¹, Pu Zhou¹

Affiliation

¹ College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.

Abstract

In this paper, we realize a 3.96 kW all-fiberized and polarization-maintained (PM) amplifier with narrow linewidth and near-diffraction-limited beam quality. Based on a master oscillator power amplifier (MOPA) configuration seeded with phase-modulated single-frequency laser, a 3.96 kW signal laser is achieved with a 3 dB linewidth of 0.62 nm at the pump power of 5.02 kW. At the maximum output power, the polarization extinction ratio (PER) is ~13.9 dB, and the beam quality (M² factor) is M²_x = 1.31, M²_y = 1.41. As far as we know, this is the maximum output power of PM narrow linewidth fiber laser with near-diffraction-limited beam quality and all-fiber format.

Keywords: fiber laser; high power; linearly polarized; narrow linewidth.

Abstract

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