All-Fiber Frequency Shifter Based on an Acousto-Optic Tunable Filter Cascaded with a Tapered Fiber-Coupled Microcavity

An all-fiber acousto-optic frequency shifter (AOFS) based on an acousto-optic tunable filter (AOTF) cascaded with a packaged tapered fiber (TF)-coupled microsphere was proposed and demonstrated in both theory and experiment. The configuration has the advantages of easy alignment, robustness, compact size, and low cost, which will improve its further application, such as in the optical heterodyne detection technique (OHDT).

Automated summary

The proposed all-fiber acousto-optic frequency shifter based on AOTF cascaded with a TF-coupled microsphere has advantages of easy alignment, robustness, compact size, and low cost, which make it suitable for applications like optical heterodyne detection technique (OHDT).