由高频调制激光二极管泵浦的Nd:YVO(4)激光器的噪声特性。

Noise characteristics of a Nd:YVO(4) laser pumped by laser diode modulated at high frequency.

作者信息

Nagai H, Kume M, Yoshikawa A, Itoh K

出版信息

Appl Opt. 1994 Aug 20;33(24):5542-5. doi: 10.1364/AO.33.005542.

DOI:10.1364/AO.33.005542

PMID:20935950

Abstract

We report, for the first time to our knowledge, on the noise characteristics of a Nd:YVO(4) laser pumped by a laser diode modulated at high frequency. We have investigated noise characteristics of a Nd:YVO(4) laser pumped by a laser diode that is oscillating in a stable multilongitudinal mode because of modulation by a high-frequency (several hundred megahertz) current. As a result, low-noise operations of -130 dB/Hz above frequencies of 1 MHz have been achieved. This noise level is comparable to the level obtained when pumping a Nd:YVO(4) laser with a laser diode that is oscillating in a single longitudinal mode. However, a noise peak corresponding to relaxation oscillations of the Nd:YVO(4) laser has appeared around a frequency of several hundred kilohertz.

摘要

据我们所知，我们首次报道了由高频调制的激光二极管泵浦的Nd:YVO₄激光器的噪声特性。我们研究了由激光二极管泵浦的Nd:YVO₄激光器的噪声特性，该激光二极管由于受到高频（几百兆赫兹）电流的调制而在稳定的多纵模下振荡。结果，在1 MHz以上的频率实现了-130 dB/Hz的低噪声运行。该噪声水平与用在单纵模下振荡的激光二极管泵浦Nd:YVO₄激光器时获得的水平相当。然而，在几百千赫兹的频率附近出现了一个与Nd:YVO₄激光器弛豫振荡相对应的噪声峰值。