Laser dynamics of asynchronous rational harmonic mode-locked Er-doped fiber soliton laser

• Main Author: 江國豪
• Other Authors: 賴暎杰
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/75376094689953239943

碩士 === 國立交通大學 === 顯示科技研究所 === 100 === The thesis is focused on the laser dynamics studies of asynchronous rational harmonic mode-locked Er-doped fiber soliton lasers. The rational harmonic mode-locking can provide higher repetition rates and the asynchronous mode-locking can help achieve good mode-locking performance. We stabilize the laser cavity length by locking the deviation frequency of asynchronous mode-locking to help measure the laser dynamics of the laser system. Base on the information of the RF spectra, we estimate the timing and center frequency variation of the asynchronous rational harmonic mode-locked pulse trains. We verify that the effective modulation strength is mainly from the higher order signals of the RF amplifier in asynchronous rational harmonic mode-locked lasers with only phase modulation. We also experimentally find a new operation state of synchronous harmonic mode-locking. Stable 40 GHz mode-locking operation can be achieved with RF spectral sidebands quite similar to the asynchronous mode-locking. A series of experiments have been performed to investigate the characteristics of this interesting new operation state.