Abstract

This paper introduces an integrated optical time-domain reflectometry (iOTDR) design with low overhead based on several innovations, such as analog-to-probability conversion and probability density modulation, as well as well-known techniques. Due to the small form factor, low overhead, and CMOS compatibility of the proposed system, it holds the promise to be integrated with any optical communication transceiver. The prototyping system clearly demonstrates the feasibility of the proposed instrumentation by comparing its performance to a conventional OTDR setup that is based on an analog-to-digital converter. In addition, the system is integrated onto a custom printed circuit board to demonstrate the promise of future integration into optical transceivers. The experimental results demonstrate a spatial resolution of 23 cm, a sensitivity of ${-}{60}\;{\rm dB}$, and a dynamic range of 24.15 dB.

© 2020 Optical Society of America

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