SKU: AOMD
The AOMD is a high-performance acoustic modulator driver designed to optimize optical output response to an electrical control signal, featuring four working mode setting switches for application-specific adjustments. It has three control modes: digital TTL, analog 0-1V and 0-5V, and digital/analog, in which the analog signal controls the digital intensity. The AOMD generates a temperature-insensitive wave at a fixed frequency that matches the acoustic-crystal resonance, forming a Bragg grating within the crystal for efficient light diffraction. It delivers up to 3W driving power with a 24V DC input. Due to the sinusoidal power dependency of Bragg diffraction, the acousto-optic modulator (AOM) exhibits inherent nonlinearity in its response to the input signal. To mitigate this effect and enhance linearity, the AOMD integrates a pre-distortion circuit to improve the linearity for both digital and analog optical response, though with some limitations in profile matching. Each fiber-coupled acoustic modulator is precisely aligned to the electrically generated grating, optimizing light collection with minimal insertion loss at the output fiber. A pre-set impedance matching screw minimizes optical loss for each Agiltron device while allowing field adjustments if necessary. The SMA modulation control input varies the diffraction amplitude, resulting in modulation of the output light intensity for precise optical control.
To prevent damage, the AOMD must not be powered when open or shorted, and proper grounding is essential for optimal performance. As the unit generates heat, it must be mounted on a metal structure using fixing screws for heat removal.
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