Open AccessSingle-longitudinal-mode Ho:YVO4 MOPA system with a passively Q-switched unidirectional ring oscillator
Author(s) -
Ruixue Wang,
Baoquan Yao,
Ben Zhao,
Yi Chen,
Gaoyou Liu,
Dai Taguchi,
Xiaoming Duan
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.034618
Subject(s) - optics , materials science , longitudinal mode , isolator , amplifier , laser , pulse repetition frequency , ring laser , continuous wave , pulse (music) , optoelectronics , physics , electrical engineering , telecommunications , radar , cmos , detector , computer science , engineering
A 2052.96 nm single-longitudinal-mode pulsed Ho:YVO 4 MOPA system was demonstrated for the first time. The pulsed Ho:YVO 4 MOPA system consisted of a unidirectional ring passively Q-switched oscillator and a single-pass amplifier. By inserting an isolator, a half-wave plate and a Cr 2+ :ZnS plate into the ring Ho:YVO 4 oscillator cavity, the single-longitudinal-mode pulsed laser was achieved with an average output power of 1.02 W with pulse width of 910 ns and pulse repetition frequency (PRF) of 67 kHz. Using the residual (non-absorbed) pump power of the oscillator as pump, the single-pass pulsed Ho:YVO 4 amplifier obtained an average output power of 1.67 W. The total optical-to-optical efficiency of the pulsed Ho:YVO 4 MOPA system was 14.3%. Single-longitudinal-mode pulsed MOPA system based on isolator and Cr 2+ :ZnS around 2 µm has not been reported yet to the best of our knowledge.