Optical wireless communications

Details Optical wireless communications Optical wireless communications

2005-05-17

2009-08-18

Phan, Hanh (Department: 2613)

Optical communications

Optical communication over freee space

C398S115000, C398S116000, C398S117000, C398S126000, C398S127000, C398S128000, C398S135000, C398S058000, C398S059000, C398S060000, C398S062000, C398S064000, C257S098000, C257S088000, C257S444000

Reexamination Certificate

active

07577364

ABSTRACT:
An optical wireless local area network using line of sight optical links. The base station and terminal stations are provided with optical transceivers which include a transmitter array and detector array. The transmitter array consists of an array of resonant cavity light emitting diodes integrated using flip-chip technology with a CMOS driver circuit. The driver circuit includes constant bias, current peaking and charge extraction. The driver circuitry is compact and can be confined within a region underlying the corresponding light source. The detector array consists of an array of photo diodes, provided with sense circuitry consisting of a pre-amplifier and post-amplifier. The diodes and sense circuitry are also integrated using a flip-chip technique. The light emitter and the detector may include adaptive optical elements to steer and/or focus the light beams.

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