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

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)15879-15884
Number of pages6
JournalOptics Express
Volume19
Issue number17
DOIs
Publication statusPublished - 2011 Aug 15

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Chen, N. K., Liu, F. Z., Chuang, H. P., Lai, Y., Yang, S. D., Lin, J. W., Liaw, S. K., Chang, Y. C., Huang, C. B., & Chi, S. (2011). Highly efficient femtosecond pulse stretching by tailoring cavity dispersion in erbium fiber lasers with an intracavity short-pass edge filter. Optics Express, 19(17), 15879-15884. https://doi.org/10.1364/OE.19.015879