Ultra-long and high-stability random laser based on EDF gain-media and Rayleigh scattering distributed mirror

Abstract

An ultra-long, low-threshold and high-stability Random distributed feedback fiber laser (RDF-FL) based on Erbium-doped fiber (EDF) to provide the gain medium, and single mode fiber (SMF) as a distributed mirror in combination with fiber-brag grating (FBG) to form the cavity is proposed in this paper. Typical random laser radiation for a SMF length of 50 km with a low-threshold of 10 dBm and high-stability (~0.1 dB) is achieved, thanks to the design of the cavity and the high-gain from the pumped erbium-doped fiber. Besides, 200 km quasi-losses random laser due to the distributed mirror and the FBG reflector is demonstrated.

Multiwavelength based on nonlinear optics of intensity and phase modulators

“…12 In the same year, a different configuration was implemented to report an ultralong, low threshold, and high-stability random distributed feedback fiber laser based on EDF and SMF as a distributed mirror in combination with FBG. 13 Unfortunately, most of the multiwavelength lasing techniques based on EDF failed to achieve stable output with small wavelength spacing at room temperature due to the homogeneous line broadening of the EDF at room temperature, which leads to strong competition among the generated wavelengths.…”