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In a leakage channel fiber, the desired fundamental mode (FM) has negligible waveguide loss. Higher-order modes (HOM) are designed to have much higher waveguide losses so that they are practically eliminated during propagation. Coherent reflection at the fiber outer boundary can lead to additional confinement especially for highly leaky HOM, leading to(More)
We report laser Doppler ophthalmoscopic fundus imaging in the rat eye with near-IR heterodyne holography. Sequential sampling of the beat of the reflected radiation against a frequency-shifted optical local oscillator is made onto an array detector. Wide-field maps of fluctuation spectra in the 10 Hz to 25 kHz band exhibit angiographic contrasts in the(More)
A new intramedullary rod has been developed for the treatment of subtrochanteric fractures. The stepped fluted rod is designed as a single unit and has exceptional bending strength and rigidity as well as excellent torsional load-carrying capacity. It has been used successfully in eighteen patients with a variety of subtrochanteric fractures. Union was(More)
We demonstrate for the first time a flat-top mode from a 50 µm-core Yb-doped leakage channel fiber (LCF). The flat intensity distribution leads to an effective mode area of ~1880 µm(2) in the straight fiber, an over 50% increase comparing to that of regular LCF with the same core diameter. The flat-top mode was achieved by using a uniform Yb-doped silica(More)
Tm-doped 790-nm-pumped silica fiber lasers are excellent candidates for producing emission at <1.95 microm, but achieving efficient operation at these wavelengths requires careful attention to fiber design because of the characteristic three-level reabsorption effects. We present a discussion of methods for mitigation of these effects and two(More)
The authors report on the first demonstration of optical fibres based on the Ga:La:S system. Core-clad structures have been fabricated by the rod and tube method and pulled into lengths > 200m. Transmission over the wavelength range I .O to 6.5~~ with fibre loss approaching the absorption and scattering level of the bulk glass. is obtained, opening the(More)
Conventionally, large-mode-area (LMA) fiber lasers use free-space polarizing components to achieve linear polarization output. External components, however, significantly limit laser robustness and power scalability. We demonstrate, to the best of our knowledge, the first high-power all-fiber cavity single-polarization single-transverse-mode LMA fiber(More)
Mechanical failure was induced in cadaver spines by applying flexion, extension, and lateral bending loads with continuous recordings of moment and rotation. Each spine was then stabilized with Harrington distraction rods, compression rods, and titanium mesh in sequence, and tested in a similar manner. The spines stabilized with mesh appeared stronger but(More)
FUNDING: Overall, 2004-2005 was another excellent year in which the department continued to excel in education, research and service. Research funding in the department was $4,501,221 (total costs) in NIH support (source: NIH Website). This is a decline of about 2 million from the previous year. While this decline is large and concerning, a major(More)