The optical module has a semiconductor light emitting device, a lens, a holder for the device and the lens, and a receptacle core onto which a ferule of a counter optical plug is to be fitted. When the optical plug is connected, the semiconductor light emitting device is optically coupled with an optical...http://www.google.fr/patents/US6035664?utm_source=gb-gplus-shareBrevet US6035664 - Method of producing an optical module