Alfalight Inc. of Madison, Wis., has appointed Sanetronic Co. Ltd. as its distributor in China. Based in Kowloon, Hong Kong, the company will provide sales and support for Alfalight's high-power diode-pump lasers and laser modules. Sanetronic, which offers optoelectronics and photonics expertise, also has offices in the Chinese cities of Beijing, Shanghai, Shenzhen, Wuhan and Chengdu.