Abstract: An optical transmitter and receiver for use in a fiber optic LAN and characterized by reduced pulse-width distortion, low noise, simplicity of design, and advantageous use of widely-available low-cost components. Pulse-width distortion of an optical transmitter is reduced using a pulse input and conditioning circuit that maintains the optical source in an ON state when the injected pulse energy subsides for a time closely approximating the source's turn-on delay. A pre-amplifier portion of an optical receiver is of the transimpedance type, having a low-noise first stage and a moderate-gain second stage connected to the first stage by a feedback resistance on the order of a few kilo-ohms. The low impedance of the feedback resistor minimizes thermal noise, whereas the moderate gain of the second stage still allows a high transimpedance to be achieved. A simple, single-transistor LO-LITE circuit is also disclosed.

Abstract: An optical fiber connector assembly having a housing with front and rear barrels is readily securable to a printed circuit board. A laser device is positioned in the rear barrel portion and an optical fiber ferrule device is insertable into the front barrel portion for receiving laser light. An insert member means for positioning the ferrule means in proximity to the laser means is disposed in the rear barrel portion forward of the laser means.