Fiber Coupled Acousto Optical Modulator/Shifter Low Loss High Extinction - 80MHz

SKU: AOMF

The AOMF Series Fiberoptic Acousto-Optic Modulators deliver high-speed optical intensity modulation and wavelength shifting with superior performance. Based on a proprietary patent-pending design, they feature low insertion loss (~1.2 dB), high extinction ratio (>62 dB), high polarization extinction ratio (>30 dB), low power consumption, and high optical power handling up to 10 W — unmatched by other vendors. The AOMF operates by acoustically generating an optical grating inside the crystal using a side-mounted piezo actuator driven at its resonance frequency for maximum efficiency. As light passes through the crystal, it is diffracted by the grating, with maximum intensity at the Bragg-aligned exit angle. The driving electronics modulate the acoustic amplitude, controlling the optical attenuation. Response speed is determined by the resonance frequency, with available options at 80 MHz and 200 MHz; the achievable modulation bandwidth is below the resonance frequency. The AOMF supports a wide wavelength range from 350 nm to 2400 nm, is compatible with all fiber types, and offers competitive cost. The device operates in a normally opaque state and becomes transparent under Bragg diffraction conditions, which occur over a narrow wavelength band where diffraction efficiency is maximized. It inherently produces a positive frequency shift, with negative shift options available upon request. The AOMF design features fiber optic collimators aligned to an acousto-optic crystal, with no epoxy in the optical path, ensuring maximum stability and long-term reliability.