Monolithic Single-Frequency Lasers at Several Wavelengths

在1064 nm和1319 nm两个波长下，单片环方法构建强大的高相干激光源已经得到了很好的证明。如果在相同的高功率和极端相干性下可以获得更多的波长，那么这种激光设计的商业市场和技术价值就会增加。本研究探索了基于单片环形谐振器设计的激光器在1064 nm和1319 nm以外的许多波长。这些激光器可以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化使用的激光线上产生强大的单频二极管泵浦激光振荡。采用了两种技术。首先，使用Nd:YAG，该研究使用波长选择性涂层来获得尽可能多的波长。其次，利用扩散键的方法构建了具有掺杂和未掺杂区域的单片谐振腔，分别在Nd:YAG （946 nm）和Yb:YAG （1030 nm）两条准三能级激光线上的激光器。可用的单频激光线的范围有望扩大。第二阶段将设计第一阶段确定波长的激光器。

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.