Title :
Cross-Phase Modulation Instability in Mode-Locked Laser Based on Reduced Graphene Oxide
Author :
Lei Gao ; Tao Zhu ; Min Liu ; Wei Huang
Author_Institution :
Key Lab. of Optoelectron. Technol. & Syst., Chongqing Univ., Chongqing, China
Abstract :
Cross-phase modulation instability (XPMI) is experimentally observed in a fiber ring cavity with net normal dispersion and mode-locked by long fiber taper. The taper is deposited with reduced graphene oxide, which can decrease the threshold of XPMI due to the enhanced nonlinearity realized by 8-mm evanescent field interaction length and strong mode confinement. Experimental results indicate that the phase matching conditions in two polarization directions are different, and sidebands with different intensities are generated. This phase matching condition can be satisfied even the polarization state of the laser varies greatly under different pump strengths.
Keywords :
fibre lasers; graphene; laser cavity resonators; laser mode locking; laser stability; nanophotonics; optical fibre polarisation; optical modulation; optical phase matching; optical pumping; phase modulation; ring lasers; CO; XPMI; cross-phase modulation instability; evanescent field interaction length; fiber ring cavity; long fiber taper; mode-locked laser; net normal dispersion; phase matching conditions; polarization directions; pump strengths; reduced graphene oxide; sideband generation; strong mode confinement; Amplitude modulation; Cavity resonators; Optical fiber dispersion; Optical fiber polarization; Pump lasers; Mode-locked fiber laser; cross phase modulation instability; reduced graphene oxide;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2361781
