在光參量振盪器光泵下以AgGaSe2晶體進行紅外上轉換

Abstract

光參量振盪器已被廣泛地使用於可調波長的同調光源，本論文描述製作一光參量振盪器，輸出波長從1.25μm至1.55μm，並使用此光源作為上轉換之泵光。本實驗中上轉換所使用的晶體為銀鎵硒。此上轉換器可將lOμm至16μm的中紅外輻射上轉換至1.3μm至1.4μm近紅外波段，利用此上轉換器對連續的二氧化碳雷射 (10.6μm) 及鉀蒸氣在 4S-8S(6D) 之雙光子共振激發所產生之紅外脈衝譜線進行了量測。 本文詳細地描述了對光參量振盪器的架設、特性量測，並對連續式與脈衝式中紅外光信號的上轉換訊號進行討論。

Optical parametric oscillator(OPO) has been widely used as tunable coherence source. In this thesis. An optical parametric oscillator which can be tuned from 1.25μm to 1.55μm is described. An up-converter, made of AgGaSe2 crystal and pumped by the OPO, is used to up-convert the infrared radiation in the wavelength range 10-16μm into near infrared. With this up-converter, a CW CO2 laser(10.6μm) and some IR spectral lines from the potassium vapor, excited by two-photo resonance, were measured. In this thesis, the setup and characteristics of the OPO are described in detail. The results measured with the up-converter are also discussed.