PLC is more known in the field of electronic technology. Here will introduce four kinds of fabrication processes for opticalwaveguides: ion exchange, ion implantation, chemical vapor deposition and flame hydrolysis. Relying on 21 years of experience in OEM ODM manufacturing of optical communication passive basic devices, HYC has continuously achieved technological innovation, and established a complete range from chip post-process processing to overall coupling packaging technology, high-precision full-wavelength testing technology, and providing customers with a full series of PLC optical splitter products. http://www.hyc-system.com