Title

Second harmonic generation by femtosecond Yb-doped fiber laser source based on PPKTP waveguide fabricated by femtosecond laser direct writing

RIS ID

107961

Publication Details

Tu, C., Huang, Z., Zhang, S., Hu, M., Wang, Q., Wang, Q., Li, E., Li, Y. & Lu, F. (2011). Second harmonic generation by femtosecond Yb-doped fiber laser source based on PPKTP waveguide fabricated by femtosecond laser direct writing. Optics Communications, 284 455-459.

Abstract

The frequency doubling of femtosecond pulses from an Yb-doped fiber laser source was demonstrated in a PPKTP waveguide fabricated by femtosecond laser direct writing. The PPKTP waveguide contains a fixed period of 8.9 μm and the feomtosecond fundamental pulses have a central wavelength of 1044 nm. A maximum SHG power of 406 mW was produced, yielding a conversion efficiency of 5.6%. Numerical simulations were carried out to investigate the property of frequency doubling for femtosecond pulses. The results show that the SHG process proceeds even the quasi-phase-matching (QPM) condition is not well satisfied, which is significantly different from that of "long" pulses or CW light and is accorded with the experimental results.

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.optcom.2010.09.022