RISTRA OPO

The RISTRA OPO is not currently offered for sale by AS-Photonics.

The RISTRA is an image-rotating nanosecond optical parametric oscillator (OPO) designed to produce excellent beam quality in high energy pulses. The non-planar optical path (shown in the right figure above) introduces a 90° rotation of the resonated signal beam on each pass of the cavity. This has been proven to produce high beam quality and high pointing stability. Image rotation also allows fixed mirror mounts, so no mirror adjustment is ever needed. The left figure shows the single-crystal RISTRA assembly previously offered by AS-Photonics.

We’ve also spent quite a lot of time developing quality documentation (see the RISTRA manual).

RISTRA Features
No mirror adjustments Distortion-free 3-point mirror mounting No feedback into the pump laser 8 mm clear aperture ±10º crystal rotation 1- or 2-crystal designs available Free RISTRA modeling software available as a MATLAB App (requires a MATLAB license), or an older APL-based Windows application is available upon request. Clear and comprehensive documentation (with example applications included) Exceptional beam quality, even for very high Fresnel numbers (> 400) Exceptional pointing stability 10-15 ns ideal pump duration Vacuum compatible

RISTRA Features

No mirror adjustments
Distortion-free 3-point mirror mounting
No feedback into the pump laser
8 mm clear aperture
±10º crystal rotation
1- or 2-crystal designs available
Free RISTRA modeling software available as a MATLAB App (requires a MATLAB license), or an older APL-based Windows application is available upon request.
Clear and comprehensive documentation (with example applications included)
Exceptional beam quality, even for very high Fresnel numbers (> 400)
Exceptional pointing stability
10-15 ns ideal pump duration
Vacuum compatible