Open AccessCW dual-frequency MOPA laser with frequency separation of 45 GHz
Author(s) -
Miao Hu,
Yaoyuan Zheng,
Jun Cai,
Guiju Zhang,
Qiliang Li,
Xuefang Zhou,
Yizhen Wei,
Yang Lü
Publication year - 2015
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.23.009881
Subject(s) - laser , materials science , optics , amplifier , laser power scaling , laser beam quality , continuous wave , optoelectronics , physics , laser beams , cmos
A CW dual-frequency master oscillator power amplifier (MOPA) laser system with dozens of gigahertz (GHz) frequency separation is presented. The MOPA system consists of a monolithic microchip seed laser and a double-end pumped traveling wave power amplifier. The short length of seed laser cavity guarantees the seed signal with a large frequency separation (above 53 GHz) but low output power (below 247.8 mW). By adding a long and low-doped active medium laser amplifier stage, a significant increase in laser power and an improvement in beam quality are obtained. After fine temperature tuning of seed laser cavity for "spectra matching", a 2.40 W dual-frequency laser signal with 45 GHz frequency separation is achieved.