Non-Linear Optics
KTP OPO
Onyx Optics, Inc. introduces Adhesive-Free Bond (AFB®) quasi-non-critical phase-matching (QNCPM) and quasi-phase-matching (QPM) for high efficiency and high beam quality nonlinear optical (NLO) frequency conversion. The AFB® QNCPM and QPM devices have completely compensated for spatial walk-off and enlarged angular acceptance. Similar to non-critical phase-matching (NCPM) devices, they are insensitive to slight laser misalignments, but can be engineered to all critical phase-matching (CPM) wavelengths. The AFB® QNCPM AND QPM devices are therefore the ideal replacement for current CPM NLO devices where high efficiency and high beam quality are required.
Onyx Optics, Inc.'s Adhesive-Free Bond (AFB®) technology has primarily been used to produce high efficiency laser composites, such as end-capped laser rods, slabs, disks, and laser waveguides. Recently, the scientists at Onyx Optics, Inc. have successfully transferred the AFB® technology to nonlinear optics and demonstrated the AFB® QNCPM and QPM devices in a type-II phase-matched 2-µm KTP OPO. Due to the large walk-off angle (~2.68°) of the e-polarized signal (or idler) beam, the 2-µm OPO's in a single KTP crystal usually require large-scale low repetition rate (several tens Hz) and high pulse energy (several millijoules to several hundreds millijoules) Nd:YAG lasers as a pump source. The AFB® QNCPM and QPM devices developed by Onyx Optics, Inc. each consist of 16 layers of 2mm thick 50°-cut single KTP crystals with walk-off compensated alignment. Nearly 50µJ output has been achieved in the AFB® QNCPM KTP OPO at a pump energy of 523 µJ, a repetition rate of 1 KHz, and a pulse width of 15ns. For the AFB® QPM KTP OPO, two sets of closely spaced signal and idler wavelengths have been achieved with a total output energy of 35 µJ. Both OPO's have measured full-width at half-maximum (FWHM) angular acceptance of 0.35°, which is about nine times broader than the calculated angular acceptance for the same length single KTP OPO.
Walk-Off Correction
Onyx now offers the walk-off correction of non-linear crystals such as KTP and ZGP through our AFB® process. We possess the criteria to design walk-off corrected AFB® composites employing uniaxial and biaxial crystals.
Onyx offers walk-off correction of non-linear crystals such as KTP and ZGP through our AFB® process. We can manufacture walk-off corrected (WOC) composites according to customer specifications and are able to assist with the complete design of WOC components or devices.
Onyx has recently obtained an exclusive license from the U.S. Department of Energy to practice the inventions described in U.S. Patent No. 6,544,330, entitled "Bonded, Walkoff Compensated Optical Elements."
Crystal
Non-linear crystals may be utilized as bulk material or used to create a walk-off corrected AFB® composite. These crystals are available to customers within the United States in a variety of standard sizes, with or without coatings, and are available with a short lead time. Custom crystals are available, as well. Our crystal types are below:
Potassium Titanyl Phosphate(KTiOPO4/KTP)
Potassium Titanyl Arsenate (KTiAsO4)
Rubidium Titanyl Phosphate(RTiOPO4/RTP)
Beta Barium Borate(ß-BaB2O4/BBO)
Lithium Triborate (LiB3O5)
Potassium Dihydrogren Phosphate/Deuterated Dihydrogen Phosphate (KDP/DKDP)
