Study of Short Cavity Optical Parametric Oscillator and Blue Lasers
Date Issued
2008
Date
2008
Author(s)
Hu, I-Ning
Abstract
This thesis is organized into three parts : (a) a theory of quasi-phase matching and quasi-phase matched optical parametric oscillator(QPM OPO), (b) a design of one-dimensional periodically poled congruent grown LiTaO3 (1D-PPCLT) for constructing a 532nm laser pumped optical parametric oscillator (OPO) and the optical parametric blue light generators by two methods, (c) an implementation of two-dimensional second harmonic generation(2D SHG) experiment, a quasi-phase matched optical parametric oscillator system and two types of optical parametric blue light generators.irst, the theory of quasi-phase matching and optical parametric oscillation will be introduced in the second chapter. In the second part, the designed periods of periodically poled lithium tantalate will be introduced. The period for 532nm nano-second laser pumped optical parametric oscillator is 7.76micro-meter, the period of the self-doubling optical parametric blue light generator is 7.90micro-meter, and the period of the cascade optical parametric blue light generator is 7.76micro-meter and 4.99micro-meter.e finally implemented two types of singly resonant oscillators (SRO) at the wavelength of 930nm and 1260nm respectively. The output spectrum of the 930nm SRO ranges from 896nm to 1032nm, with a lasing threshold of 6.0MW/cm2 and slope efficiency of 22.8%. The output spectrum of the 1260nm SRO ranges from 1098nm to 1310nm, with a lasing threshold of 4.4MW/cm2 and slope efficiency of 13.9%. s for the optical parametric blue light generators, the cascading laser has 16.9% conversion efficiency for one side output coupling and 6.1nm acceptance bandwidth, and the self-doubling case has 4.8% conversion efficiency for one side output coupling and 1.3nm acceptance bandwidth.
Subjects
PPCLT
OPO
cascade
SHG
Type
thesis
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