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Proceedings Paper

Efficient cascade Raman source in methane-filled hollow-core fibers operating at 2.8 um
Author(s): Zhixian Li; Wei Huang; Yulong Cui; Zefeng Wang
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Paper Abstract

We report here a novel two-stage approach Raman cascade laser source operating at 2.8 μm. In the first stage, a pulsed pump laser at 1064.6 nm is coupled into a methane-filled hollow-core fiber and efficiently transfer to 1st Stokes wave at 1543.9 nm. The quantum efficiency is ~ 87%, which is achieved in 2 bar methane pressure and 2 m fiber length. In the second stage, the 1st Stokes wave is coupled into another methane-filled hollow-core fiber as the pump source, 2nd Stokes wave at 2.8 μm is obtained with a high quantum efficiency of ~75%, which is achieved in 11 bar methane and 2.2 m fiber length. The record total quantum efficiency (from the 1064 nm pump laser to Stokes wave at 2.8 μm) of ~ 65% is achieved, which is 1.6 times the previous reported value. This kind of gas filled hollow-core cascade Raman laser source provides a potential method to obtain high efficiency mid-infrared laser sources with low threshold in various applications.

Paper Details

Date Published: 5 November 2018
PDF: 6 pages
Proc. SPIE 10811, High-Power Lasers and Applications IX, 108110P (5 November 2018); doi: 10.1117/12.2500868
Show Author Affiliations
Zhixian Li, National Univ. of Defense Technology (China)
Wei Huang, National Univ. of Defense Technology (China)
Yulong Cui, National Univ. of Defense Technology (China)
Zefeng Wang, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 10811:
High-Power Lasers and Applications IX
Ruxin Li; Upendra N. Singh, Editor(s)

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