Monolithic Single-Frequency Lasers at Several Wavelengths

在1064 nm和1319 nm两个波长下，用单片环形方法建立强大的、高度相干的激光光源已经得到了很好的证明。如果在同样的高功率和极端相干性下提供更多的波长，这种激光器设计的商业市场和技术价值就会增加。这项研究探索了基于单片环形谐振器设计的波长不同于1064 nm和1319 nm的激光器。这些激光器可应用于绝对距离干涉测量、探测天文毫米波的天文仪器、原子钟和使用特定的近红外和可见光波长的精密计量。第一阶段的目标是在一些尚未商业使用的激光线路上实现大功率、单频、二极管泵浦的激光振荡。采用了两种技术。首先，这项研究使用了Nd：YAG，使用具有波长选择性的涂层来获得尽可能多的波长。其次，利用扩散键合技术在946 nm和1030 nm的两条准三能级激光谱线--Nd946 nm和Yb：YAG1030 nm处构建了单片掺杂区和非掺杂区的激光器。现有的单频激光线路的范围有望扩大。第二阶段将是设计第一阶段中确定的波长的激光器。

The monolithic ring approach to building powerful, highly-coherent laser sources is been well proven at the two wavelengths of 1064 nm and 1319 nm. The commercial market and the thus technological value of this laser design increased if more wavelengths were available at the same high power and extreme coherence. This research explores lasers based on the monolithic ring resonator design at a number of wavelengths other than 1064 nm and 1319 nm. These lasers may applications in absolute-distance interferometry, astronomical instrumentation for detection of astronomical millimeter waves, atomic clocks and precision metrology using specific near infrared and visible wavelengths. The Phase I objective is to powerful, single-frequency, diode-pumped laser oscillation on a number of laser lines that have not yet been used commercially. Two techniques are employed. First, using Nd:YAG, the research uses wavelength-selective coatings to get as many wavelengths as possible. Second, lasers at two quasi-three level laser lines - Nd:YAG at 946 nm, and Yb:YAG at 1030 nm - are constructed by using diffusion-bonding to create monolithic resonators with doped and undoped regions. The range of single-frequency laser lines which are available is expected to be expanded. Phase II will be the design of lasers at wavelengths identified in Phase I.