Scaling of an Asynchronous Harmonic Mode-locked Er-doped Fiber Laser up to 40 GHz Repetition Rate

• Main Authors: Wen, Chih-Chieh, 温智傑
• Other Authors: Lai, Yin-Chieh
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/c7ds2q

碩士 === 國立交通大學 === 光電工程研究所 === 106 === In this thesis, we successfully scale an asynchronous harmonic mode-locked Er-doped fiber laser up to 40 GHz repetition rate. The numerical modeling and simulation for the present fiber laser are also demonstrated. The theoretically predicted tendencies of the existence region of the asynchronous state as well as the pulsewidth, optical bandwidth and time-bandwidth product under different repetition rates agree well with the experimental results. At 40 GHz, we further investigate the trend of the existence region of the asynchronous state under different modulation depths. By using the feedback control system, we are able to control the variations of the deviation frequency and the repetition rate within 2 kHz range by utilizing only low frequency electronics, which reduces the cost for long-term laser stabilization.