High energy pulse generation in large negative-dispersion mode-locked Er-doped fiber laser with long cavity length

• Main Authors: Kan, Li-Hsing, 甘力行
• Other Authors: Lai, Yinchieh
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/63481228711128143870

碩士 === 國立交通大學 === 顯示科技研究所 === 99 === In this thesis, we experimentally demonstrate a passive mode-locked Erbium-doped fiber laser with large net round trip anomalous dispersion and nonlinearity through about 400m cavity length. The laser can output optical pulse trains at the low repetition rate around 500kHz and with the high pulse energy larger than 120nJ directly from the laser output. By adjusting the polarization controllers (PCs) and the pump power level, high energy pulses with square profile and nanosecond pulse-width without pulse breaking can be observed. Finally, we study the characteristic parameters of our pulses for further compressing the pulse-width to attain the short pulse-width and high peak power.