Title :
Experimental research on kW single mode MOPA fiber laser
Author :
Zhang, Liming ; Zhou, Shouhuan ; Zhao, Hong ; Zhu, Chen ; Li, Yao ; Zhang, Kun ; Wang, Xiongfei ; Zhang, Dayong
Author_Institution :
Sci. & Technol. on Solid-state Laser Lab., North China Res. Inst. of Electro-Opt., Beijing, China
Abstract :
The home and abroad status of kW-class fiber laser is investigated. And the achievable method of kW all fiber laser and manner of controlling mode are analyzed. The ways of master-oscillator power amplifier which includes a master oscillator stage and a booster amplifier stage were used. The continuous laser of 1.08μm, biggest output power of 1.05kW is achieved respectively. And the optical-optical conversion efficiency is 77%. The beam quality is Mx2 =1.43 and My2 =1.42. The reason that beam quality is deteriorative is analyzed. In high power, part of laser which is transmitted in the fiber core originally, is leaked to inner cladding by fiber bending. Then, the beam quality is worsened by laser which was transmitted in inner cladding. For some special use, the stabilization of center wavelength is researched. Through measurement, there is no obvious variation in center wavelength with the output power increasing.
Keywords :
fibre lasers; laser beams; laser frequency stability; laser modes; optical fibre cladding; waveguide discontinuities; MOPA fiber laser; beam quality; center wavelength stabilization; fiber bending; fiber core; inner cladding; master-oscillator power amplifier; optical-optical conversion efficiency; power 1.05 kW; wavelength 1.08 mum; Fiber lasers; Laser beams; Laser excitation; Measurement by laser beam; Optical fiber amplifiers; Optical fiber devices; Power lasers; MOPA; kilowatt fiber laser; pump source; single mode;
Conference_Titel :
Optoelectronics and Microelectronics (ICOM), 2012 International Conference on
Conference_Location :
Changchun, Jilin
Print_ISBN :
978-1-4673-2638-4
DOI :
10.1109/ICoOM.2012.6316249