Enhancement of terahertz-wave output from LiNbO3 optical parametric oscillators by cryogenic cooling

被引：107

作者：

Shikata, J ^{[1
]}

Sato, M ^{[1
]}

Taniuchi, T ^{[1
]}

Ito, H ^{[1
]}

机构：

[1] Tohoku Univ, Elect Commun Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

OPTICS LETTERS | 1999年 / 24卷 / 04期

关键词：

D O I：

10.1364/OL.24.000202

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In recent years widely tunable terahertz- (THz-) wave generation from LiNbO3 optical parametric oscillators (OPO's) has been successfully demonstrated by use of the prism output-coupler method. However, there remains a problem of large absorption loss for generated terahertz waves inside the crystal, so we investigated the cryogenic characteristics of the OPO. me achieved 125-times-higher THz-wave output and 32% reduction of the generation threshold by cooling the crystal to 78 K. This scheme also provides direct lose measurement at THz frequency, and we found that the THz-wave enhancement mechanism is improvement of the gain as well as the reduction of the absorption coefficient. (C) 1999 Optical Society of America OCIS codes: 190.2620, 190.4410, 190.4970, 190.5890, 300.1030.

引用

页码：202 / 204

页数：3

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