Optical fiber delay line system for optical analog-to-digital converter and delay control method thereof

Abstract

This invention proposes a fiber optic delay line system for optical analog-to-digital converters and its delay control method, belonging to the field of optoelectronic technology. The fiber optic delay line system consists of N levels of fiber optic delay line units, wherein the Kth level fiber optic delay line unit consists of 2... N‑k It consists of 2 identical Kth-order fiber delay lines, each Kth-order fiber delay line containing 2 K Root input fiber and 2 K The output optical fiber; the Kth-level optical fiber delay line is used to store the 2nd-level optical fiber delay line of the Kth-level optical fiber delay line. K The input and output optical fibers are divided into two groups of equal number, and the number of fibers in each group is controlled to be 2. K‑1 This invention maintains consistent relative delay between the input and output optical fibers and allows for adjustment of the relative delay between these two sets. Through a cascaded structure of multi-stage fiber delay line units, based on the vernier caliper effect, it enables high-precision control of the delay between channels in an optical ADC system at low cost and high speed.

Images