Transceiver design for MSD indoor free-space laser links

S. Jivkova; Boian A. Hristov

doi:10.1117/12.563200

21 June 2004 Transceiver design for MSD indoor free-space laser links

S. Jivkova, Boian A. Hristov

Proceedings Volume 5449, Eighth International Conference on Laser and Laser Information Technologies; (2004) https://doi.org/10.1117/12.563200
Event: Eighth International Conference on Laser and Laser Information Technologies, 2003, Smolyan, Bulgaria

Abstract

In Multi-Spot Diffusing (MSD) configuration, the communication channel can be considered virtually ideal at data rates of hundreds of Mbps. Thus, the main concern is power efficiency. We propose transceiver optical designs that allow for a reconfigurable transmitter output and independent communication channels. Transmitter employs multiple light sources that can be turned on and off independently. This way, optical signal is provided only where it is needed, which optimizes power usage. Receiver utilizes an imaging optical system and segmented photodetector, thus performing direction diversity reception. We show that when maximum ratio combining is employed for the electric signals processing and power efficient modulation schemes like L-PPM are used significant power savings can be obtained.

Citation Download Citation

S. Jivkova and Boian A. Hristov "Transceiver design for MSD indoor free-space laser links", Proc. SPIE 5449, Eighth International Conference on Laser and Laser Information Technologies, (21 June 2004); https://doi.org/10.1117/12.563200

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KEYWORDS

Receivers

Transmitters

Transceivers

Vertical cavity surface emitting lasers

Optical design

Signal to noise ratio

Light sources

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