泵浦增强光参量振荡器产生连续可调太赫兹波辐射。

Pump-enhanced optical parametric oscillator generating continuous wave tunable terahertz radiation.

机构信息

Laboratory for Optical Systems, Department of Microsystems Engineering-IMTEK, University of Freiburg, Freiburg, Germany.

出版信息

Opt Lett. 2011 Nov 15;36(22):4374-6. doi: 10.1364/OL.36.004374.

DOI:10.1364/OL.36.004374

PMID:22089568

Abstract

We demonstrate a tunable cw terahertz (THz) parametric oscillator based on periodically poled MgO-doped lithium niobate, directly converting the 1030 nm pump wave into the THz regime. The tunability ranges from 1.2 to 2.9 THz at output power levels between 0.3 and 3.9 μW. To overcome the high pump threshold caused by THz absorption in the nonlinear crystal, we employ an enhancement cavity with a finesse of 500 at the pump wavelength. The intracavity pump threshold at 1.4 THz is measured to be 350 W for a crystal length of 2.5 cm.

摘要

我们展示了一种基于周期性极化掺镁铌酸锂的可调谐连续波太赫兹 (THz) 参量振荡器，可将 1030nm 的泵浦光直接转换到 THz 波段。在输出功率为 0.3 到 3.9μW 的范围内，调谐范围从 1.2 到 2.9THz。为了克服非线性晶体中 THz 吸收引起的高泵浦阈值，我们在泵浦波长处采用了 500 精细度的增强腔。对于 2.5cm 长的晶体，在 1.4THz 时腔内泵浦阈值测量值为 350W。