Modulators
Acousto-optic
modulators are used to vary and control laser beam intensity. A Bragg
configuration gives a single first order output beam, which intensity
is directly linked to the power of RF control signal. The
rise
time of the modulator is simply deduced by the necessary time for the
acoustic wave to travel through the laser beam. For highest speeds the
laser beam will be focused down, forming a beam waist as it passes
through the modulator.
Quanta Tech proposes a wide range
of modulators with associated drivers. The set is optimized to offer
the best performances (rise time, extinction ratio...) .The RF driver
features all the necessary signal to drive the modulator (carrier
frequency, amplifier...) with analog or digital input control. A low
cost OEM version is proposed together with a complete laboratory
version (BOX). The laboratory version is a versatile turn-key tool for
fast set-up and allows the user to have AM capabilities from front
panel (DC modulation) or from an external signal.