Summary of the technology
(original title of project: Optical Parametric Amplifier with Large Aperture)
• Diffusion bonded periodically poled crystals can increase the effective crystal aperture with high gain and good beam profile
• (Method to tune crystal materials to optically amplify light signals)
Project ID : 14-2018-5685
Description of the technology
Computer Science and Engineering
Laser, optical amplifier, polled crystal
Current development stage
General list: TRL3 Experimental proof of concept
Optical Parametric Amplification is a process in which a strong pump field nonlinearly interacts with a medium to drive secondary waves at different frequencies. Maximum gain is obtained when the phase-matching condition of the wave vectors (pump, signal and idler beams) is met. Usually, it is difficult to achieve phase-matching conditions in an isotropic medium due to the characteristic dependence of the refractive index on wavelength. Quasi-phase matching is a technique that exploits electric field poling of ferroelectric oxide crystals to obtain optical parametric amplifiers. However, a major drawback of this technique is the small aperture size of the periodically poled crystals.
- The present invention concerns a method for parametrically amplifying a signal beam in large aperture periodically poled crystal, which is composed of at least two periodically poled crystals.
- Diffusion bonded periodically poled crystals can increase the effective crystal aperture with high gain and good beam profile.
- Can expand quasi-phase matching to high power devices that need large apertures.
The width of a periodically poled crystal can be increased by stitching (at least) two crystals together using diffusion-bonding and so one can obtain a larger aperture.
Diffusion bonding is a promising technique to obtain large aperture optical parametric amplifiers based on periodically poled crystals and will allow their use in high-energy applications.