Abstract

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. We 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 loss 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.

© 1999 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Tunability enhancement of a terahertz-wave parametric generator pumped by a microchip Nd:YAG laser

Shin'ichiro Hayashi, Takayuki Shibuya, Hiroshi Sakai, Takunori Taira, Chiko Otani, Yuichi Ogawa, and Kodo Kawase
Appl. Opt. 48(15) 2899-2902 (2009)

Continuous-wave operation of a single-frequency optical parametric oscillator at 4–5 μm based on periodically poled LiNbO3

M. M. J. W. van Herpen, S. E. Bisson, and F. J. M. Harren
Opt. Lett. 28(24) 2497-2499 (2003)

Terahertz wave parametric oscillations at polariton resonance using a MgO:LiNbO3 crystal

Zhongyang Li, Pibin Bing, Sheng Yuan, Degang Xu, and Jianquan Yao
Appl. Opt. 54(18) 5645-5649 (2015)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription