Effect of Rayleigh-scattering distributed feedback on multiwavelength Raman fiber laser generation.
We experimentally demonstrate a Raman fiber laser based on multiple point-action fiber Bragg grating reflectors and distributed feedback via Rayleigh scattering in an ~22-km-long optical fiber. Twenty-two lasing lines with spacing of ~100 GHz (close to International Telecommunication Union grid) in the C band are generated at the watt level. In contrast to the normal cavity with competition between laser lines, the random distributed feedback cavity exhibits highly stable multiwavelength generation with a power-equalized uniform distribution, which is almost independent on power.
Photonics Research Group, Aston University, Birmingham, B4 7ET, UK. eltaheae@aston.ac.uk
A E
AE
El-Taher
P
P
Harper
S A
SA
Babin
D V
DV
Churkin
E V
EV
Podivilov
J D
JD
Ania-Castanon
S K
SK
Turitsyn