Time Interleaving is a technique in which multiple signals or data streams are sampled, processed, or transmitted in alternating time slots to increase overall system throughput or effective sampling rate. In electronic and optical systems, it is commonly used in analog-to-digital converters and communication links, where parallel channels operate with staggered timing. This approach enables higher data rates and improved bandwidth utilization but requires precise synchronization and calibration to minimize timing mismatches and distortion.
We propose a method to compensate the phase offset between samples from different tributaries in time-interleaved phase OTDR using nested phase reference channels. We demonstrate our method for a four-span bidirectional link with high-loss loopback.
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