High Power Random Fiber Laser With Short Cavity Length: Theoretical and Experimental Investigations

Author

Zinan Wang ; Han Wu ; Mengqiu Fan ; Li Zhang ; Yunjiang Rao ; Weili Zhang ; Xinhong Jia

Author_Institution

Key Lab. of Opt. Fiber Sensing & Commun. (Educ. Minist. of China), Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

21

Issue

1

fYear

2015

fDate

Jan.-Feb. 2015

Firstpage

10

Lastpage

15

Abstract

In this paper, we make a comprehensive study on a highly efficient half-open cavity design for high power random fiber laser (RFL). With the theoretical analysis, we optimize the cavity´s fiber length for getting higher output power within the scheme, i.e., shorter fiber length is preferred for efficiently harvesting the first order random lasing at the open end of the cavity. As the verification of the theory, we experimentally demonstrate a high output power (7 W), highly efficient (70% optical conversion efficiency) RFL working at 1140 nm, using 10 W 1090 nm laser as the pump source and only 1 km standard single-mode fiber as the distributed cavity.

Keywords

fibre lasers; laser cavity resonators; optical pumping; cavity fiber length; distributed cavity; efficiency 70 percent; first order random lasing; high power random fiber laser; highly efficient half-open cavity design; optical conversion efficiency; output power; power 10 W; power 7 W; pump source; size 1 km; standard single-mode fiber; wavelength 1090 nm; wavelength 1140 nm; Distributed feedback devices; Fiber lasers; Laser feedback; Optical fibers; Optical pumping; Distributed feedback lasers; Raman scattering; Random media; Rayleigh scattering; optical fiber lasers;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/JSTQE.2014.2344293

Filename

6868231