A phase modulating unit (13) phase-modulates the phase signals and outputs phase modulation signals.

  A phase modulator (12) generates a phase-modulated signal obtained by phase-modulating the phase component signal.

The phase modulator (14) is then used to correct the aberrations.

An optical modulator (20) for a high power laser transmitter includes a laser source (22) coupled through a phase modulator (24) to a signal modulator (26).

The invention also relates to an interferometer based on the phase modulator.

The characteristic difference between a phase modulator and a frequency modulator is:

An adaptive phase modulator system broadly comprises a chirped-pulse amplifier (CPA) laser, an optical fiber, an adaptive phase modulator, a phase measurement element, and a control element.

The optical waveguide element (10) is constituted by integrating the optical phase modulator(10A) and the optical intensity modulator (10B).

The phase modulator (132) performs the phase modulation according to the intensity of the light at each instant.

A discrete phase modulator (70) can provide the phase shift.

A compensator compensates for the phase distortion created by the phase modulator by modifying the amplitude component.

The phase modulator will be converted into amplitude modulation by the auction of the interferometer.

The device can be configured as a modulator of amplitude and/or a modulator of phase of incident light wavefront.

A phase modulator (48) provides phase shift key modulation of the output signal in accordance with a phase control signal.

The modulation may be via an electro-optic, magneto-optic, or acousto-optic phase modulator (34), or via a mechanically driven phase modulator (34) comprising a wedge, waveplate or phase mask.