PROGRESS: Completed Project	PROJECT REF: NA
PROJECT TITLE: Optoelectronic Interface Circuit (OEIC)
PROJECT DESCRIPTION: Optoelectronic interface circuits provide the connection between the electrical world of the digital system and the optical world of the fiber transmission system. The chip can be optimized according to specific applications and provides value added functionality. The key technologies for optical transceiver modules include the optoelectronic chip, the electronic interface circuit, the coupling into the optical fiber and the assembly of the components. The transmitter module contains a VCSEL as the light source and a monitor photodiode to stabilize the output power. The driver chip provides electrical interface to the module and ensure stable VCSEL operation. The driver data input is a standard TTL electrical interface. The input stage contains a trigger function for signal forming. Amplitude and modulation of the laser current are adjusted by the monitor photocurrent and the bias resistor. The driver can also provide a sleep function to minimize the power consumption of the module. This function is important for battery powered applications.
FOCUS AREA(S): Opto-electronics
KEYWORDS: Opto-electronics; driver chip; interface circuit; OEIC
COLLABORATION: Flexible and on a case-by-case basis
STATUS PATENT: Patent Pending	PATENT NO: NA
ORGANIZATION: ASTRI
CONTACT PERSON: Jonathan Leung	EMAIL: klleung@astri.org
TEL: (852) 3406 2980	FAX: (852) 3406 2801
WEBSITE: http://www.astri.org	DATE: