3.1 W mid-infrared fiber laser at 4.16 µm based on HBr-filled hollow-core silica fibers

Author:

Zhou Zhiyue,Huang Wei,Cui Yulong,Li Hao,Pei Wenxi,Li Xuanxi,Li Ziyan1,Wang Meng1,Wang Zefeng1

Affiliation:

1. State Key Laboratory of Pulsed Power Laser Technology

Abstract

We present the characteristics of a continuous-wave (CW) mid-infrared fiber laser source based on HBr-filled hollow-core fibers (HCFs) made of silica. The laser source delivers a maximum output power of 3.1 W at 4.16 µm, showing a record value for any reported fiber laser beyond 4 µm. Both ends of the HCF are supported and sealed by especially designed gas cells with water cooling and inclined optical windows, withstanding higher pump power accompanied by accumulated heat. The mid-infrared laser exhibits a near-diffraction-limited beam quality with a measured M2 of 1.16. This work paves the way for powerful mid-infrared fiber lasers beyond 4 µm.

Funder

National Natural Science Foundation of China

Science and Technology Innovation Program of Hunan Province

Outstanding Youth Science Fund Project of Hunan Province Natural Science Foundation

Postgraduate Scientific Research Innovation Project of Hunan Province

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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