Title :
Coherent combining of two pulsed fibre lasers in phase modulated mutually coupled fibre laser array
Author :
Zhou, Peng ; Wang, Xiongfei ; Chen, Zhe ; Li, Xin ; Liu, Zhe ; Xu, Xin
Author_Institution :
Coll. of Opt.-Electr. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha
Abstract :
A scalable architecture for coherent combining of pulsed fibre lasers is reported. Stable synchronous and phase-locked pulsed fibre laser beams are generated in a phase modulated mutually coupled fibre laser array. The mechanism for generating a pulsed laser is different from previous Q-switching, modelocking or pump modulation methods. Two pulsed fibre lasers are coherently combined with 0.48 J pulse energy at the repetition rate of 115 kHz. The repetition rate can be controlled by adjusting the pump current. The combining efficiency of the two pulsed fibre lasers reaches 90 and the fringe contrast is larger than 40 .
Keywords :
fibre lasers; laser arrays; laser beams; laser stability; optical modulation; optical pulse generation; optical pumping; phase modulation; coherent combining; efficiency 90 percent; energy 0.48 muJ; fringe contrast; mutually coupled fibre laser array; phase modulation; phase-locked pulsed fibre laser beams; pulsed fibre laser generation; pump current; stable synchronous laser beam;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20082057
