Share Email Print
cover

Proceedings Paper

Characteristics of femtosecond second-harmonic generation in periodically poled lithium niobate
Author(s): Jiatong Luo; Yong Wang; Wanguo Liang; Jorge Fonseca-Campos; Chang-Qing Xu
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The temporal and spectral characteristics of femtosecond second-harmonic-generation (SHG) in quasi-phase-matched (QPM) periodically poled lithium niobate (PPLN) are investigated experimentally and theoretically. In the experiments, we studied SHG in PPLN waveguides with different device design and fabrication conditions by adopting ~100-fs optical pulses with different peak powers in the 1.55-μm band. Large phase modulation and spectral broadening of the fundamental wave, and a shift of the centre frequency of the second-harmonic wave were observed when the peak power of the fundamental wave was high enough. Saturation of the conversion efficiency was also observed, which depends on fundamental pulse width and peak power. These phenomena could be attributed to nonlinear phase accumulation under large group-velocity mismatch. In the theory, evolutions of pulse waveforms and optical spectra were studied for both the fundamental and second-harmonic pulses by solving the coupled-mode equations. The simulation results are in good agreement with the experimental data.

Paper Details

Date Published: 8 September 2006
PDF: 9 pages
Proc. SPIE 6343, Photonics North 2006, 634349 (8 September 2006); doi: 10.1117/12.707961
Show Author Affiliations
Jiatong Luo, McMaster Univ. (Canada)
Yong Wang, McMaster Univ. (Canada)
Wanguo Liang, McMaster Univ. (Canada)
Jorge Fonseca-Campos, McMaster Univ. (Canada)
Chang-Qing Xu, McMaster Univ. (Canada)


Published in SPIE Proceedings Vol. 6343:
Photonics North 2006
Pierre Mathieu, Editor(s)

© SPIE. Terms of Use
Back to Top