中文摘要：

最近几年,紧凑型、便携式、低廉、可调谐的太赫兹波源由于具有广泛的应用前景因而成为太赫兹领域的研究焦点.波长为600—2000nm范围的近红外光源由于具有体积紧凑、价格低廉、频率可调谐和工作稳定的特点,所以频繁被选为太赫兹波产生的抽运源.本文着重从双波长可调谐抽运源、内腔光参量振荡器太赫兹发生器两个方面进行了较系统的阐述.分析表明,近红外相对中红外双波长抽运光源由于具有更紧凑的结构而成为研究热点;差频和非线性级联过程由于具有调谐范围宽的特点而成为产生太赫兹辐射的重要手段.

英文摘要：

Recently, due to the potential applications, the developing of compact, portable, low cost, and tunable THz wave became a research focus of THz technology. The light source with a wavelength range from 600—2000 nm frequently serves as a pumped source of THz wave due to its property of compact size, low cost, tunable frequency and stable operation. In this paper, tunable dual-wavelength continuous-wave pumping source and THz generator with an internal-cavity optical parameter oscillator are overviewed and analyzed in detail. It is shown that pumping source in the near-infrared wave band is more advantageous than those in the mid-infrared wave band for compactness in size. It is also shown that the difference frequency and nonlinear cascade processes have become an important way to generate THz radiation for wide tuning merit in such a system.