Title :
Rational harmonic mode locking of an optically triggered fiber laser incorporating a nonlinear optical loop modulator
Author :
Tang, W.W. ; Shu, C. ; Lee, K.L.
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
Rational harmonic mode locking is first demonstrated in an erbium-doped fiber laser using an all-optical approach. Both bright and dark pulse trains up to 4.58 GHz are obtained at 1.55 μm by adjusting the initial reflection state of the intracavity loop mirror. The nonlinear loop modulator serves as a mode locker and an adjustable end reflector in the laser. The setup is useful for optional bit-rate multiplication while providing a means for the conversion of wavelength, as well as the conversion between bright and dark pulses. The output wavelength is also tunable upon the adjustment of a cavity fiber Fabry-Perot filter.
Keywords :
Fabry-Perot resonators; erbium; fibre lasers; laser cavity resonators; laser mirrors; laser mode locking; laser tuning; optical fibre filters; optical modulation; optical pulse generation; optical wavelength conversion; 1.55 mum; 4.58 GHz; Er-doped fiber laser; adjustable end reflector; all-optical approach; bright and dark pulse trains; bright pulses; cavity fiber Fabry-Perot filter; dark pulse trains; dark pulses; harmonic mode locking; initial reflection state; intracavity loop mirror; mode locker; nonlinear loop modulator; nonlinear optical loop modulator; optically triggered fiber laser; optional bit-rate multiplication; output wavelength; rational harmonic mode locking; wavelength conversion; Erbium-doped fiber lasers; Fiber nonlinear optics; Laser mode locking; Optical fibers; Optical filters; Optical modulation; Optical pulses; Optical reflection; Power harmonic filters; Wavelength conversion;
Journal_Title :
Photonics Technology Letters, IEEE
