Custom optical crystals; optical products using said optical crystals, namely optical windows, optical mirrors, optical substrates, and nonlinear optical crystal mixers; and optical instruments using optical crystals, namely acousto-optic modulators, electro-optic modulators, photoconductors, raman laser crystals, laser crystals, coherent optical sources, lasers not for medical use, optical detectors used for measuring photon flux, photon intensity, photon pulse shape, photon pulse duration, and/or photon center frequency, namely, thermal detectors, photovoltaic and photoconductive photo-detectors, pyroelectric detectors, and acousto-optical and electro-optical detectors, optical instrumentation and measuring devices, namely, spectrometers, photometers, interferometers, optical imaging systems, not for medical use, comprised of coherent optical sources, coherent optical detectors, relay optics and mirrors, charge coupled devices, forward looking infrared imagers, hyperspectral imagers, free space and fiber optical communication systems comprised of acousto-optic modulators, electro-optic modulators, coherent optical sources, coherent optical detectors, photo-receivers, optical amplifiers, optical repeaters, relay optics and mirrors, optical couplers, electrical instrumentation and measuring devices, namely, power meters, multimeters, oscilloscopes, amplifiers, electronic circuits, computers, coherent electrical sources, electrical detectors used for measuring electro-magnetic radiation intensity, EM center frequency, EM pulse shape, duration, and repetition rate