GLsun Science And Tech Co., Ltd, founded in 2001, as a national high-tech corporation, specializes in the research, development and manufacturing of optical passive components, fiber test instruments and Optical protection equipment. GLSUN,own-patents,3rd party ROHS tests, ISO 9001-certified manufacture, with the registered capital of USD3.2 Million and factory area of 10000㎡, focuses on fiber optical access network. We design, develop and manufacture optical access products. With a broad product portfolio and tremendous production capacity, our products include: Optical Switches, Free Space Isolators,WDMs, CWDMs, DWDMs and OLP, OBP equipment etc.