Open AccessBidirectional pumped high power Raman fiber laser
Author(s) -
Qirong Xiao,
Ping Yan,
Deyu Li,
Jie Sun,
X. Wang,
Yusheng Huang,
Mali Gong
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.006758
Subject(s) - materials science , optics , fiber laser , laser , raman laser , raman spectroscopy , laser power scaling , optoelectronics , laser pumping , laser diode , dispersion shifted fiber , optical fiber , optical amplifier , wavelength , fiber optic sensor , raman scattering , diode , physics
This paper presents a 3.89 kW 1123 nm Raman all-fiber laser with an overall optical-to-optical efficiency of 70.9%. The system consists of a single-wavelength (1070nm) seed and one-stage bidirectional 976 nm non-wavelength-stabilized laser diodes (LDs) pumped Yb-doped fiber amplifier. The unique part of this system is the application of non-wavelength-stabilized LDs in high power bidirectional pumping configuration fiber amplifier via refractive index valley fiber combiners. This approach not only increases the pump power, but also shortens the length of fiber by avoiding the usage of multi-stage amplifier. Through both theoretical research and experiment, the bidirectional pumping configuration presented in this paper proves to be able to convert 976 nm pump laser to 1070 nm laser via Yb 3+ transfer, which is then converted into 1123 nm Raman laser via the first-order Raman effect without the appearance of any higher-order Raman laser.