Yaochin and Yuhang

In our lab, we have mainly three kinds of mirrors. One is from ALTECHNA, another is from LAYERTECH and the last is from Newport.

1. ALTECHNA mirror is the mirror we are basically using for squeezing injection to filter cavity. The company claim that it has a reflectivity of >99.5% for the HR side. And the surface quality is 20-10 SD. And wavefront distortion is lambda/8.

2. New port 5104 mirrors. From the website, reflectivity is >99.7%, wavefront distortion is lambda/10 and surface quality is 15-5 SD.

3. LAYERTECH. reflectivity is larger than 99.9%. We have only a few of them.