Recently, considerable attention has been paid to the optical parametric image amplification (OPIA) in the nonlinear optics and quantum optics.

Recently, considerable attention has been paid to the parametric image amplifier in the nonlinear optics and quantum optics.

Optical image of squeezed coherent states in the parametric image amplifier;

Ultra-broadband optical parametric amplification based on pre-chirp controlling;

Broadband tunable pulses in quasi-phase-matched crystal based optical parametric amplification

Laser sources that are of high repetition,short time duration and broadly tunable are needed for the application of ultra-fast laser,and femtosecond optical parametric amplification(OPA) is the preferred method for obtaining the sources.

A novel injective femtosecond optical parametric amplifier (OPA) is developed, which can produce tunable femtosecond laser with central wavelength at 1μm, based on the traditional Ti:sapphine laser.

Several x~((2)) nonlinear process plays an important role in ultrafast optics,such as second harmonic generation(SHG),optical parametric amplifier(OPA) and optical parametric chirp pulse amplifier(OPCPA).

The capability of signal amplification from single and double-pumped fiber optical parametric amplifier(FOPA) is demonstrated and the potential and problem to use double-pumped FOPA in wavelength division multiplexing or dense wavelength division multiplexingsystem are introduced.

By the use of a set of coupled equations,the gain expression of two-pump fiber optical parametric amplifier(FOPA) with three-section nonlinear fibers is deduced theoretically.

With high power optical source and high nonlinear optical fiber available, more and more attention has been in recent years paid on fiber optical parametric amplifier (FOPA) and its application for optical communication.