Title :
Subharmonic Generation in a Bandwidth Clamped Actively Mode-Locked Fiber Laser
Author :
Yang Jiang ; Guangfu Bai ; Lin Hu ; Chuang Ma ; Yuanyuan Shan ; Jianhui Liang ; Hongxia Li
Author_Institution :
Lab. for Photoelectric Technol. & Applic., Guizhou Univ., Guiyang, China
Abstract :
We propose and demonstrate a new photonic subharmonic generation mechanism through an injection locking process in an actively mode-locked fiber ring laser, whose gain bandwidth is narrower than the frequency of the injection signal. Through the recursion equation, the operation principle and subharmonic injection locking condition are theoretically analyzed. In the experiment demonstration, a 10-GHz subharmonic signal locked by a 20-GHz injection signal is obtained. The measured phase noise at 10 kHz frequency offset is -109 dBc/Hz. The results agree with the theoretical predication well and show a great potential to operate at a very high frequency and large frequency dividing ratio.
Keywords :
fibre lasers; laser mode locking; laser noise; optical harmonic generation; phase noise; actively mode-locked fiber ring laser; bandwidth clamped actively mode-locked fiber laser; frequency 10 GHz; frequency 10 kHz; frequency 20 GHz; gain bandwidth; injection signal; phase noise; photonic subharmonic generation; recursion equation; subharmonic injection locking condition; subharmonic signal; Bandwidth; Cavity resonators; Clocks; Frequency modulation; Laser mode locking; Optical fibers; Mode-locked lasers; microwave frequency conversion; subharmonic generation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2286172
