Title :
Random Distributed Feedback Raman Fiber Laser With Short Cavity and Its Temporal Properties
Author :
Hanwei Zhang ; Hu Xiao ; Pu Zhou ; Xiaolin Wang ; Xiaojun Xu
Author_Institution :
Coll. of Optoelectron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
We demonstrate a random distributed feedback Raman fiber laser with relatively short cavity in a half open cavity scheme. A record output power of 4 W in 1173 nm is obtained and the slope efficiency is more than 90%. Second-order Stokes wave at 1237 nm is also achieved with powers in two output ends of 4.1 and 0.8 W, respectively. The linewidth of the Stokes waves are recorded and discussed. We observed self-oscillation at the pump power a little above the second-order Stokes wave generation threshold, and a temporal-spatial-coupled numerical model is proposed. Numerical simulations have good agreement to the experiment results.
Keywords :
Raman lasers; distributed feedback lasers; fibre lasers; laser cavity resonators; numerical analysis; optical pumping; random processes; spatiotemporal phenomena; open cavity scheme; power 0.8 W; power 4 W; power 4.1 W; random distributed feedback Raman fiber laser; relatively short cavity; second-order Stokes wave generation threshold; second-order Stokes wave linewidth; self-oscillation; temporal-spatial-coupled numerical model; wavelength 1173 nm; wavelength 1237 nm; Cavity resonators; Distributed feedback devices; Fiber lasers; Laser feedback; Optical fibers; Pump lasers; Scattering; Raman fiber laser; distributed feedback; random laser;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2328995
