90.4-W all-fiber single-frequency polarization-maintained 1083-nm MOPA laser employing ring-cavity single-frequency seed oscillator |
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Authors: | Jiangming Xu Rongtao Su Hu Xiao Pu Zhou and Jing Hou |
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Affiliation: | College of Optoelectronic Science and Engineering,National University of Defense Technology,Changsha 410073,China |
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Abstract: | A high-power all-fiber single-frequency polarization-maintained(PM)laser operating at 1 083 nm is demonstrated using a master oscillator power amplifier(MOPA)structure.The seed source of this MOPA laser system is an in-house-built ring-cavity fiber oscillator.Four-stage amplification configuration is employed, in which the maximal output power of the main amplifier is 90.4 W,corresponding to a conversion efficiency of 72.5%.The polarization extinction ratio of the output light is 13 dB.The amplified spontaneous emission is suppressed by a factor of over 25 dB,and no stimulated Brillouin scattering effect is observed when a large-mode-area and high absorption coefficient PM gain fiber is employed. |
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