All fiber watt-level fiber source at 760 nm generated through four-wave mixing in a photonic crystal fiber.

There are limited fiber-based single-mode laser sources over the visible and near infrared range. Nonlinear conversion through four-wave mixing in photonic crystal fibers allows for the generation of new wavelengths far from a pump wavelength. Utilizing an all-fiber spliced configuration, we convert 1064 nm light into a W-level signal in the 750 nm - 820 nm spectral region.

Infrared glass-based negative-curvature anti-resonant fibers fabricated through extrusion.

Negative curvature fibers have been gaining attention as fibers for high power infrared light. Currently, these fibers have been made of silica glass and infrared glasses solely through stack and draw. Infrared glasses' lower softening point presents the opportunity to perform low-temperature processing methods such as direct extrusion of pre-forms.

Ultrafast Z-scan measurements of nonlinear optical constants of window materials at 772, 1030, and 1550 nm.

Femtosecond Z-scan measurements have been performed on six window materials at 772, 1030, and 1550 nm. Measurements of the nonlinear refractive index are presented for reference materials, fused silica and BK7 and four near-infrared window materials, multispectral ZnS (CLEARTRAN), aluminum oxynitride (AlON), spinel (MgAl2O4) ceramic, and barium gallogermanate (BGG) glass.

Thermo-optic coefficient of barium gallogermanate glass.

Barium gallogermanate (BGG) glasses are currently being explored as a viable low cost material for numerous U.S. defense and commercial visible-infrared window applications.

Germanate glass as a window for high energy laser systems.

A modified Barium Gallo-Germanate glass has been developed as an exit window for high energy lasers operating in the mid-infrared wavelength region. All the physical properties, for application as a window for high energy laser systems have been measured. Absorption loss and thermo-optic coefficient were identified as key in developing the Barium Gallo-Germanate glass for high energy laser applications.

Dispersion of barium gallogermanate glass.

Gallogermanate glasses are the subject of intense study as a result of their unique combination of physical and optical properties, including transmission from 0.4 to beyond 5.0 microm.