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1.57μm eye-safe optical parametric oscillator studies

Author: HeYuan
Tutor: HouXueYuan
School: Shandong University
Course: Optical Engineering
Keywords: Optical Parametric Oscillator Noncritical phase matching KTP crystal Cr ~ 4: YAG passively Q-
CLC: TN752
Type: Master's thesis
Year: 2005
Downloads: 205
Quote: 1
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Abstract


In the modern large-scale use of optical instruments easy to give 1.06μm laser eye damage caused, so people competing to develop eye-safe wavelength lasers. Wavelength of 1.57μm wavelength of the laser near the relative safety of the human eye, and thus there is a wide range of laser ranging applications. Using technology 1.57μm OPO OPO laser eye safety, eye-safe laser to achieve the main technical ways. Optical parametric oscillator (Optical Parametric Oscillator) as a tunable, highly coherent laser light, its unique excellent properties, has been attracting interest of many researchers. In recent years, with the nonlinear frequency conversion crystal and solid-state laser technology rapid development, making this very active area of ??research. Research output eye-safe laser wavelength KTP-OPO system is one of the hot spots. With 1.06μm wavelength Nd: YAG laser pumped KTP-OPO system that uses Class Ⅱ noncritical phase matching (θ = 90 °, φ = 0 °), the parameters obtained 1.57μm signal light output. In this thesis, to Nd: YAG-KTP intracavity posed optical parametric oscillator (IOPO) conducted a more comprehensive theoretical and experimental studies, he finally completed a small integrated 1.57μm eye-safe laser light source device. Paper mainly includes the following aspects: 1. Introduces the basic principles of optical parametric oscillator, research profiles as well as in the application of frequency conversion technology. 2 From the three-wave interaction of coupled wave equations, the optical parametric oscillator theory analyzes and research on parametric oscillation threshold pump conversion efficiency operating parameters for a comprehensive analysis, summed up the OPO design aspects of the basic principles. Three experimental studies xenon lamp-pumped, Cr 4 : YAG passively Q-switched 1.06μm Nd: YAG laser output characteristics of the static and dynamic analyzes 1.06μm explored the outer chamber pumped OPO system required single pulse output conditions. 4 In the xenon lamp-pumped, Cr 4 : YAG passively Q-switched Nd: YAG laser cavity to achieve a cavity KTP-OPO system operation, the measurement of different Cr 4 : YAG crystal small-signal transmission, the output coupling mirror transmittance of different conditions, cavity OPO system output condition. And studied the use of different sizes as the nonlinear crystal KTP crystal 1.57μm parametric signal light output performance. Observed single pulse and a multi-pulse signal light generation, analysis of the multi-pulse causes and summarizes the conditions necessary for a single pulse is generated. 5 existing fire control system 1.06μm Nd: YAG laser distance to the original source cavity structure to achieve a folded cavity distance 1.57μm KTP-OPO single pulse operation of the laser, the laser through the temperature, high temperature, low

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Oscillation technique,the oscillator > Oscillator
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