Stratophase Ltd
- Supplier of nonlinear optical materials including periodically poled lithium niobate (PPLN).
- http://www.stratophase.com/

U-Oplaz Technologies, Inc.
- Authorized dealer for JDSU CASIX crystals.
- http://www.u-oplaz.com/

PromLab
- Manufacturer and supplier of ZnSe crystals.
- http://www.promlab.com

Tecrys Ltd
- Manufacturer of nonlinear optical materials: lithium triborate (LBO), beta barium borate (BBO), cesium lithium borate (CLBO) and potassium tytanil phosphate (KTP).
- http://www.tecrys.com

SHINKOSHA co., Ltd
- Crystal growth and precision processing of oxide materials.
- http://www.shinkosha.com

Cradley Crystals
- Single-crystals of YAG, LiNbO3, LiTaO3, KDP, DKDP, ZnSe, MgF2, and CaF2.
- http://www.cradley-crystals.com

Vitron - Spezialwerkstoffe GmbH
- Provider of optical materials and components for infrared and other different applications.
- http://www.vitron.de

Cristal Laser S.A.
- Specializes in growth of nonlinear crystals.
- http://www.cristal-laser.fr/

Photox Optical Systems
- Supplier of a variety of non-linear, laser, scintillation and photorefractive crystals and superconductive substrates.
- http://www.photox.co.uk

Keystone Crystal Corporation
- Manufactures and fabricates high quality cadmium telluride, cadmium zinc telluride and related single crystal substrates.
- http://users.zoominternet.net/~kcc/