Acousto High Speed Fiber Optical Switches

SKU: AFOS

The AFOS series fiber optic switch provides exceptionally high-speed switching up to 20 MHz with rise and fall times as short as 15 ns. The switching is bidirectional and controlled by an external TTL signal. The device offers low insertion loss ~0.7dB from Port 1 to Port 2 at the zeroth diffraction order (without TTL applied), and approximately 1.5 dB when switching from Port 1 to Port 3 at the first diffraction order (with TTL applied). The isolation between Ports 2 and 3 is approximately 12 dB. The AFOS supports optical power levels up to 10 W and operates across a 350 – 2400 nm wavelength range, compatible with all fiber types. Due to its Bragg-diffraction-based design, it functions within a narrow wavelength band, which can be optimized for any selected wavelength. The device inherently introduces a positive frequency shift corresponding to the acoustic driving frequency. The optical assembly uses fiber collimators aligned to an acousto-optic crystal, with no epoxy in the optical path to ensure maximum thermal stability and long-term reliability. The rise and fall times of the acousto-optic modulator are determined solely by the laser beam diameter, providing predictable and repeatable performance.