Upconversion blue laser by intracavity frequency self-doubling of periodically poled lithium tantalate parametric oscillator

C-M Lai; I-N Hu; Y-Y Lai; Z-X Huang; L-H Peng; A Boudrioua; A-H Kung

doi:10.1364/OL.35.000160

Upconversion blue laser by intracavity frequency self-doubling of periodically poled lithium tantalate parametric oscillator

Opt Lett. 2010 Jan 15;35(2):160-2. doi: 10.1364/OL.35.000160.

Authors

C-M Lai¹, I-N Hu, Y-Y Lai, Z-X Huang, L-H Peng, A Boudrioua, A-H Kung

Affiliation

¹ Department of Electronic Engineering, Ming Chuan University, Taoyuan, Taiwan.

PMID: 20081954
DOI: 10.1364/OL.35.000160

Abstract

We report a design for upconversion 435 nm blue lasers based on simultaneously fulfilling the nonlinear processes of optical parametric oscillation (OPO) and second-harmonic generation (SHG) in a 7.9 mum periodically poled lithium tantalate (PPLT). The uncoated 15-mm-long PPLT device exhibits a low threshold of 150 mW and a differential slope efficiency of 22.6%, rendering 56 mW blue generation when pumped by a pulsed 532 nm green laser with an average power rating of 400 mW. These observations were attributed to a quasi-phase-matching (QPM) structural design with a 75% domain duty cycle to ensure the concurrence of frequency doubling with the first-order QPM-OPO PPLT device via the second-order QPM-SHG process.