利用光栅反馈光学器件通过腔内倍频产生高功率绿光

High-powered green light generation by intracavity frequency doubling using grating feedback optics.

作者信息

Kitaoka Y, Urairi K, Yamamoto K, Kato M, Sasaki T

出版信息

Appl Opt. 1995 Aug 20;34(24):5361-5. doi: 10.1364/AO.34.005361.

DOI:10.1364/AO.34.005361

Abstract

Grating feedback optics is shown to contribute to narrowing the spectral bandwidth of a multilongitudinal-mode laser diode to less than 0.2 nm and tuning the lasing wavelength to the peak absorption wavelength of Nd:YVO(4). A continuous green light of 31 mW was efficiently generated by intracavity frequency doubling of the Nd:YVO(4) laser with a KTiOPO(4) crystal. A relative intensity noise of less than -140 dB/Hz was obtained in the frequency region greater than 2 MHz. The noise characteristics of generated green light are discussed as compared with the case of using a single-longitudinal-mode laser diode as the pumping source.

摘要

光栅反馈光学器件被证明有助于将多纵模激光二极管的光谱带宽缩小至小于0.2纳米，并将激光波长调谐至Nd:YVO₄的峰值吸收波长。通过使用KTiOPO₄晶体对Nd:YVO₄激光进行腔内倍频，高效地产生了31毫瓦的连续绿光。在大于2兆赫兹的频率区域获得了小于-140分贝/赫兹的相对强度噪声。与使用单纵模激光二极管作为泵浦源的情况相比，讨论了所产生绿光的噪声特性。