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Design and simulation of a simple laser rangefinder using a semiconductor optical amplifier-detector

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Abstract

Using numerical simulations, we show that cross-gain modulation between pairs of counter-propagating pulses within a semiconductor optical amplifier can be used to detect the range and reflectivity of a target, forming a compact time-of-flight laser ranger. The range is deduced from multiple contacts along the SOA. The SOA also provides gain to the optical pulses reflected off the target. A single external component is required to provide pulses into back of the SOA, with the front of the SOA being directly coupled to the target.

©2005 Optical Society of America

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Figures (5)

Fig. 1.
Fig. 1. Proposed SOA-based ranging system.
Fig. 2.
Fig. 2. Powers throughout system using a 3-contact SOA.
Fig. 3.
Fig. 3. Simplified schematic from VPIcomponentMakerâ„¢Active Photonics simulator.
Fig. 4.
Fig. 4. Differential output versus pulse delay for 7 reflectivities from 30 to 36 dB, 1-dB steps.
Fig.6.
Fig.6. ffect of right facet reflectivity (zero left-facet reflectivity).
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