Narrowband all-fiber acousto-optic tunable add-drop filter based on dispersion-compensating fiber

A narrowband fast tunable acousto-optic add-drop filter is proposed and demonstrated based on the acoustically induced birefringence of dispersion compensating fiber, which covers wavelengths from 1510 nm to 1590 nm. The single-wavelength filtering is successfully realized with bandwidth of around 5 nm, by peak fusion of the nearly degenerated coupling of the vector mode group with acousto-optic interaction length of smaller than 5 cm. The constructed filter has reconfigurable band-pass and band-rejection filtering characteristics, and obtains the advantages of narrow band, fast tuning speed, single wavelength, compact size, simple fabrication and zero frequency shift. It has potential applications in the fields of tunable lasers, wavelength division multiplexing optical communication and optical signal processing.

Automated summary

A narrowband fast tunable acousto-optic add-drop filter is proposed and demonstrated, which is based on the acoustically induced birefringence of dispersion compensating fiber and covers wavelengths from 1510 nm to 1590 nm. Single-wavelength filtering is achieved with a bandwidth of around 5 nm by peak fusion of the nearly degenerated coupling of the vector mode group with an acousto-optic interaction length of smaller than 5 cm. The constructed filter has reconfigurable band-pass and band-rejection filtering characteristics, and offers advantages such as narrow band, fast tuning speed, single wavelength, compact size, simple fabrication, and zero frequency shift. It has potential applications in the fields of tunable lasers, wavelength division multiplexing optical communication, and optical signal processing.