Эксперимент удвоения частоты нелинейного оптического кристалла

nonlinear-optical-crystal-frequency-doubling-experiment

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Nonlinear optical crystal frequency doubling experiment

Knowledge Introduction

In the nonlinear optics, the phase matching angle of nonlinear optical crystal has important influence on conversion efficiency and stability of frequency doubling light. This is the typical experiment to study the phase matching angle of nonlinear optical crystal. By analyzing the results of frequency doubling light power measurement for different incidence angles of KTP validates that the relation to frequency doubling efficiency along with the change of phase mismatching angle.

Experiment Device

Main points:

a) The concept of phase matching angle (θ，φ)

b) Three-wave interaction efficiency:η=η₀sinc²(ΔΚl/2)

c) External cavity frequency doubling

Factors that influence efficiency of frequency doubling

d) Characteristics of class I and II phase matching crystal

Experiment result

Related Courses

Principles of Laser, Non-linear Optics, Laser Optics, All Solid State Laser and Nonlinear Optical Frequency Conversion Technology

Basic Configuration

Name	Specifications
Laser	Q-switched laser, Wavelength:1064nm（Include current source）
Focusing lens	f=80mm (with high transmittance film of 1064nm)
Crystal	KTP, II phase matching (LBO, I phase matching, selectable)
Filter	With high-reflectivity film of 1064nm and high transmittance film of 532nm
Power meter	Detection wavelength coverage: 0.19-25um, Sensitivity: 10mW, Uncertainty<2%
Others	Slideway, lens and crystal base, adjusting bracket, optical universal stage (0-360°), Infrared display card, laser goggle etc.