Highly efficient femtosecond pulse stretching by tailoring cavity dispersion in erbium fiber lasers with an intracavity short-pass edge filter

Nan Kuang Chen, Feng Zhou Liu, Hsiu Po Chuang, Yinchieh Lai, Shang Da Yang, Jim Wein Lin, Shien Kuei Liaw, Yu Chung Chang, Chen Bin Huang, Sien Chi

研究成果: Article同行評審

摘要

We demonstrate highly efficient pulse stretching in Er3+-doped femtosecond mode-locked fiber lasers by tailoring cavity dispersion using an intracavity short-pass edge filter. The cavity dispersion is preset at around zero to obtain the shortest pulsewidth. When the cutoff wavelength of the short-pass edge filter is thermo-optically tuned to overlap the constituting spectral components of mode-locked pulses, large negative waveguide dispersion is introduced by the steep cutoff slope and the total cavity dispersion is moved to normal dispersion regime to broaden the pulsewidth. The time-bandwidth product of the mode-locked pulse increases with the decreasing temperature at the optical liquid surrounding the short-pass edge filter. Pulse stretch ratio of 3.53 (623.8fs/176.8fs) can be efficiently achieved under a temperature variation of 4°C.

原文English
頁(從 - 到)15879-15884
頁數6
期刊Optics Express
19
發行號17
DOIs
出版狀態Published - 2011 八月 15

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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