Abstract: A photon storage tube high power laser system having a repetitively pulsed or pumped laser therein and a photon storage tube. An initial pulse of electromagnetic radiation generated by the repetitively pulsed laser is directed into the storage tube for storage until amplified by redirection through the gain medium of the repetitively pulsed laser. As a result of appropriate adjustment of related focusing optics the repetitively pulsed laser acts only as a gain medium after the initial pulse generation. Continued storage and amplification of the initial pulse produces a high energy pulse of electromagnetic radiation which is subsequently output from the system.

Abstract: A fiber optic device basically comprising an optical fiber/interference filter combination finds useful application in optical communication systems for wavelength selection or bandwidth selection from a multiwavelength light source or emitter. If the emitter is a semiconductor laser, the device may be also employed to provide single longitudinal mode control at the selected wavelength or bandpass.

Abstract: A source of pulsed multicolor coherent light, usable for holographic purposes, comprises two lasers emitting wavelengths of 694 nm and 1064 nm, respectively. The emissions of these lasers are passed jointly through a nonlinear optical element such as an LiIO.sub.3 or KDP crystal, acting as a mixer, and are then partly deviated through a similar element serving as a frequency doubler. The mixer emits a wavelength of 420 nm in the blue region of the spectrum; the wavelength of 694 nm lies in the red region, whereas the wavelength of 1064 nm is transformed by the frequency doubler to 532 nm in the green region.

Abstract: An apparatus for and a method of providing an amplified, directable laser light beam is disclosed. The apparatus includes two optical cavities sharing a common mirror. The first cavity is resonant and contains a laser rod intermediate a high reflectivity reflecting mirror of 100% reflectivity and a low reflectivity transmitting mirror of 10-90% reflectivity. The second cavity is antiresonant and contains a Faraday effect diffraction grating intermediate the low reflectivity mirror and a 100% reflectivity mirror. The laser light beam that passes through the transmitting mirror is directed normally incident to the surface of and passes through the Faraday effect diffraction grating. On the far side of the diffraction grating is a mirror of 100% reflectivity, which reflects the laser light beam back through the diffraction grating forming a pair of diffracted congruent 1'st order light beams and a single undiffracted 0'th order light beam.