EFFICIENT GENERATION AND HETERODYNE-DETECTION OF 4.75-MU-M LIGHT WITH 2ND-HARMONIC GENERATION

被引：27

作者：

RUSSELL, DA

EBERT, R

机构：

[1] Forschungsgesellschaft für Angewandte Naturwissenschaften, Forschungsinstitut fur Optik, Tubingen, W-7400, Schloss Kressbach

来源：

APPLIED OPTICS | 1993年 / 32卷 / 33期

关键词：

2ND-HARMONIC GENERATION; HETERODYNE DETECTION; SILVER GALLIUM SELENIDE; TELLURIUM; CO2 LASER RADIATION;

D O I：

10.1364/AO.32.006638

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Second-harmonic generation energy conversion efficiencies of CO2 laser radiation as high as 56% have been measured in 2-cm-long AgGaSe2 crystals with 30-ns pulses. The value of the nonlinear coefficient d(36), which best fits the measured data, is (32 +/- 4) x 10(-12) m/V. Continuous-wave second-harmonic generation in tellurium generated up to 0.27 mW with an efficiency of 6.8(10)(-5). These pulsed and continuous beams were combined to demonstrate heterodyne detection at 4.75 mu m, which increased the signal strength of weak signals by at least a factor of 25 over direct detection. Simultaneous heterodyne detection of 5- and 10-mu m light is demonstrated by use of both the pump and second-harmonic beams from the cw laser as independent local oscillators.

引用

页码：6638 / 6644

页数：7

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