Abstract: An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 ?s includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.

Abstract: An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 ?s includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.

Abstract: An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 ?s includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.

Abstract: An apparatus for producing coherent, continuous wave, ultraviolet light, includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more frequency conversion stages. Each of the one or more frequency conversion stages includes one or more reflectors, an optical resonator, one or more waveguide components, or one or more fiber optic components. At least one of the one or more frequency conversion stages includes a huntite-type aluminum double borate nonlinear optical material to produce light having a wavelength between 190 and 350 nm. The huntite-type aluminum double borate material has a composition given by MAl3B4O12, where M is one or a plural combination of elements {Sc, La, Y, or Lu}.

Abstract: A fiber laser with reduced stimulated Brillouin scattering includes a spool having a height and characterized by an induced temperature gradient with the height. The fiber laser also includes a fiber wrapped on the spool and characterized by a signal power increasing along the length of the fiber. The induced temperature gradient is a function of the signal power along the fiber.

Abstract: A fiber laser system includes a master oscillator configured to generate linear polarized infrared laser radiation with wavelengths of 1015-1085 nm, pulses with durations of 100 ps to 10 ns, pulse train repetition rates of 1 kHz to 10 MHz, spectral bandwidth less than 0.5 nm, and a predominately single spatial mode and a polarization-maintaining optical isolator optically coupled to the master oscillator. The fiber laser system also includes a fiber amplifier system optically coupled to the optical isolator and including a power amplifier configured to amplify the laser radiation transmitted through the optical isolator. The power amplifier includes a polarization-maintaining, large-mode-area, multiple-clad Yb-doped gain fiber having a core, an inner cladding, and at least an outer cladding, one or more diode pump lasers emitting pump light of a nominal wavelength of 976 nm, and a pump coupler configured to couple the pump light into the gain fiber.

Abstract: A fiber laser system includes a predominately single spatial mode, linearly polarized master oscillator providing a set of optical pulses and a polarization-maintaining optical isolator optically coupled to the master oscillator. The fiber laser system also includes a fiber amplifier optically coupled to the optical isolator and including a power amplifier comprising a double clad gain fiber, one or more pump lasers, and a pump coupler. The fiber laser system further includes a pulse compression stage optically coupled to the fiber amplifier. The pulse compression stage includes a volume holographic phase grating. Moreover, the fiber laser system includes a nonlinear frequency conversion stage optically coupled to the pulse compression stage.

Abstract: An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 ?s includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.

Abstract: An apparatus for producing coherent, continuous wave, ultraviolet light, includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more frequency conversion stages. Each of the one or more frequency conversion stages includes one or more reflectors, an optical resonator, one or more waveguide components, or one or more fiber optic components. At least one of the one or more frequency conversion stages includes a huntite-type aluminum double borate nonlinear optical material to produce light having a wavelength between 190 and 350 nm. The huntite-type aluminum double borate material has a composition given by MAl3B4O12, where M is one or a plural combination of elements {Sc, La, Y, or Lu}.

Abstract: A fiber laser system includes a master oscillator configured to generate linear polarized infrared laser radiation with wavelengths of 1015-1085 nm, pulses with durations of 100 ps to 10 ns, pulse train repetition rates of 1 kHz to 10 MHz, spectral bandwidth less than 0.5 nm, and a predominately single spatial mode and a polarization-maintaining optical isolator optically coupled to the master oscillator. The fiber laser system also includes a fiber amplifier system optically coupled to the optical isolator and including a power amplifier configured to amplify the laser radiation transmitted through the optical isolator. The power amplifier includes a polarization-maintaining, large-mode-area, multiple-clad Yb-doped gain fiber having a core, an inner cladding, and at least an outer cladding, one or more diode pump lasers emitting pump light of a nominal wavelength of 976 nm, and a pump coupler configured to couple the pump light into the gain fiber.

Abstract: A fiber laser with reduced stimulated Brillouin scattering includes a spool having a height and characterized by an induced temperature gradient with the height. The fiber laser also includes a fiber wrapped on the spool and characterized by a signal power increasing along the length of the fiber. The induced temperature gradient is a function of the signal power along the fiber.

Abstract: A video image viewing device includes first and second glass plates having a layer of liquid crystal therebetween. A plurality of laser diodes extending along a line near one edge of the first plate are selectively illuminated at an intensity corresponding to the amplitude of a video signal during each of a plurality of video lines. The light propagates through the first plate via total internal reflection not entering the liquid crystal layer until it reaches an area where the refractive index of the liquid crystal is selectively modified. The refractive index may be modified by selectively energizing each of a plurality of horizontal strip electrodes vertically spaced from each other. The electrodes are sequentially energized to frustrate the total internal refraction and thereby cause the light to be transmitted through the liquid crystal layer into the second plate at a location corresponding to the location of video line in a video frame of the video signal.

Abstract: A video image viewing device includes first and second glass plates having a layer of liquid crystal therebetween. A plurality of laser diodes extending along a line near one edge of the first plate are selectively illuminated at an intensity corresponding to the amplitude of a video signal during each of a plurality of video lines. The light propagates through the first plate via total internal reflection not entering the liquid crystal layer until it reaches an area where the refractive index of the liquid crystal is selectively modified. The refractive index may be modified by selectively energizing each of a plurality of horizontal strip electrodes vertically spaced from each other. The electrodes are sequentially energized to frustrate the total internal refraction and thereby cause the light to be transmitted through the liquid crystal layer into the second plate at a location corresponding to the location of video line in a video frame of the video signal.

Abstract: An eyeglass frame having removable lenses, comprising of lens rings which are split into an upper and lower ring portion. Interposed between the upper and lower ring portions, and forming an integral part of the frame and positive actuating means to force open and draw closed the split lens rings to facilitate insertion and removal of lens. Several spices of eyeglass frame are visualized The preferred spieces utilizes a coil spring and resilient rod. Another spieces visualized utilizes several serrated coupling edges and an actuating fulcrum.