Title :
Characteristics of dispersion-tuning in harmonically mode-locked fiber laser
Author :
Shu, C. ; Zhao, Y.
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
Abstract :
We investigate the characteristics of dispersion-tuning in an actively mode-locked fiber ring laser. A continuous tuning range over 20 nm at about 1-GHz operation is realized. The range can be extended by optimizing the polarization to attain a flattened spectral gain in the Er-doped fiber. The influence of the harmonic order of operation together with the amount of dispersion in the fiber ring have been experimentally studied. Rational harmonic mode-locking is first demonstrated in the dispersion-tuned laser to increase the output repetition rate. Our results agree well with theory, showing that dispersion-tuning is a reliable, economic, and effective way to generate widely tunable pulses.
Keywords :
erbium; fibre lasers; laser mode locking; laser reliability; laser tuning; optical fibre dispersion; optical fibre polarisation; ring lasers; 1 GHz; Er-doped fiber; GHz operation; actively mode-locked fiber ring laser; continuous tuning range; economic; flattened spectral gain; harmonic order; harmonically mode-locked fiber laser; laser dispersion-tuning; output repetition rate; rational harmonic mode-locking; reliable; widely tunable laser pulse generation; Dispersion; Fiber lasers; Laser mode locking; Laser theory; Laser tuning; Optical fiber polarization; Optical fiber theory; Optical pulse generation; Reliability theory; Ring lasers;
Journal_Title :
Photonics Technology Letters, IEEE
