US 10,234,744 B2 · Periodically poled crystal and optical parametric amplifier

Abstract

The present invention belongs to the technical field of lasers, and particularly relates to a periodically poled crystal and an optical parametric amplifier. The present invention provides a periodically poled crystal, including a first nonlinear region, a linear region and a second nonlinear region, wherein the first nonlinear region and the second nonlinear region both have periodically poled structures. The optical parametric amplifier having the periodically poled crystal can separate the idler wave from the signal wave besides achieving the basic function of optical parametric amplification because the by-produced idler wave transmits in a direction different from the directions that the signal wave and the pump wave transmit, and therefore the energy reflow is suppressed when the optical parametric amplifier has reached saturated amplification, and the performance of the optical parametric amplifier is significantly improved.

Claims9

Dependent claims

A periodically poled crystal, comprising:

a first nonlinear region;
a linear region;
and
a second nonlinear region,
wherein the first nonlinear region, the linear region and the second nonlinear region are connected in sequence;
and
wherein the first nonlinear region and the second nonlinear region both have periodically poled structures;
wherein an included angle between a periodically poling direction of the first nonlinear region and a laser transmission direction is β, and an included angle between a periodically poling direction of the second nonlinear region and the laser transmission direction is −β, so that the periodically poled structure of the first nonlinear region and the periodically poled structure of the second nonlinear region are axisymmetric along the laser transmission direction.

5 more elements

Dependencies are inferred from the claim text.

Periodically poled crystal and optical parametric amplifier

Life of this patent

Periodically poled crystal and optical parametric amplifier

Life of this patent

Abstract

Claims9