Femtosecond second-harmonic generation in periodically poled lithium niobate waveguides written by femtosecond laser pulses

Authors

Zhangchao Huang, Nankai University
Chenghou Tu, Nankai University
Shuanggen Zhang, Tianjin University of Technology
Yongnan Li, Nankai University
Fuyun Lu, Nankai University
Yaxian Fan, Nanjing University
Enbang Li, University of WollongongFollow

RIS ID

93622

Publication Details

Huang, Z., Tu, C., Zhang, S., Li, Y., Lu, F., Fan, Y. & Li, E. (2010). Femtosecond second-harmonic generation in periodically poled lithium niobate waveguides written by femtosecond laser pulses. Optics Letters, 355 (11), 1752-1754.

Abstract

We present in this Letter the second-harmonic generation of femtosecond pulses in double-line-written waveguides fabricated in periodically poled lithium niobate (PPLN) with femtosecond laser pulses. In a 10-mm-long sample, a normalized conversion efficiency of 12.6% W−1 cm−2 has been achieved for 40 fs pump pulses with the wavelengths centered at 1550 nm. Simulation results show that in PPLN waveguides the FWHM of wavelength tuning curve for 40 fs pump pulses is 42 nm, which is 15 times of that for 40 ps pump pulses.