1550nm Fiber-coupled Acousto-optic Modulator 80 Mhz is to Calibration IQ Modulator.
An IQ modulator is a device that converts baseband information into RF signals. … By modulating with both in-phase (I) and quadrature (Q) inputs, any arbitrary output amplitude and phase can be selected. By targeting specific points in amplitude and phase, high order modulation is created.