Photonics Suppliers

CASTECH is a global leader in nonlinear optical crystals, laser crystals, precision optics, and laser components for laser applications, optical communications, biomedical VR/AR, and lidar. With ISO 9001 and IAFT 16949 quality management system, we consistently enable our customers from prototype to mass production stage.

Manufacturer of optical filters and coatings for many demanding applications such as biomedical instruments and imaging systems, fluorescence microscopy, aerospace, surveillance, machine vision, industrial inspection such as semiconductors, automation, multispectral imaging, chemical analysis. Custom and catalog optical filters. 100-percent employee-owned.

Optical devices supplier and manufacturer of acousto-optic modulators, acousto-optic frequency shifter, avalanche photodiodes, fiber coil and ASE source, couplers, isolator, circulator, FRM, WDM, narrow linewidth laser diode, semiconductor optical amplifier, EDFA, used for for fiber laser, sensor systems, and FOG.

Specializes in producing high-performance nonlinear optical crystals and electro-optical components for the photonics market. Product lines include nonlinear crystals such as RTP, HGTR, KTP, LBO, BBO, and CLBO. Also offers electro-optic components like RTP and BBO Pockels cells, as well as quasi-phase matching devices such as PPKTP, PPSLT, and PPLN.