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Browsing Physics, Astronomy and Mathematics by Issue Date

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Browsing Physics, Astronomy and Mathematics by Issue Date

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  • Taylor, H.F.; Martin, William Eugene; Hall, D.B.; Smiley, V.N. (1972)
    Optical surface waveguides have been fabricated by diffusing selenium into single-crystal CdS substrates to produce graded-composition CdS Se crystals. Planar guides which confine a beam in one dimension and guides produced ...
  • Martin, William Eugene; Hall, D.B. (1972)
    Planar optical waveguides have been made by sealed ampoule diffusion of Cd and Se into ZnS and Cd into ZnSe. Three-dimensional diffused guides of Cd-diffused ZnSe have been made by using a masking layer of evaporated ...
  • Taylor, H.F.; Smiley, V.N.; Martin, William Eugene; Pawka, S.S. (1972)
    The fluorescence of CdSxSe1-x mixed crystals with band-gap gradients as large as 1200 eV/cm has been investigated at 77°K. The graded samples were produced by heating CdSe or CdSxSe1-x platelets in a sulfur-selenium ...
  • Martin, William Eugene (1973)
    The diffusion constant D(T) of cadmium into single-crystal zinc selenide was measured using a photoluminescence/etch technique. Diffusions were performed in sealed ampoules using cadmium metal and cadmium selenide powder ...
  • Martin, William Eugene (1973)
    Electro-optic intensity modulation is demonstrated in three-dimensional (channel) waveguides fabricated by diffusion techniques in ZnSe and CdS. Typical diffused guide dimensions are 1.6 μm × 19 μm × 2 mm. Two electrode ...
  • Martin, William Eugene (1974-09-01)
    Refractive index profiles resulting from the fabrication of optical waveguides by diffusion techniques are measured using a reflection interferometric technique. In Cd-diffused ZnSe waveguides, the index variations are ...
  • Martin, William Eugene (1975)
    A waveguide optical switch and/or modulator device is described that uses a single-mode waveguide version of the Mach-Zehnder interferometer. A mode selective branching waveguide is used for switching, and modulation can ...
  • Martin, William Eugene (1975-10)
    Refractive index profiles resulting from simple diffusion processes in glass are calculated, and optimum choices of diffusion parameters are chosen from minimum error in approximating focusing refractive index profiles. ...
  • Cox, L.J.; Hough, J.; Adams, D.J.; Jameson, R.F. (1976)
  • Martin, William Eugene; Milam, D. (1976-12-01)
    Passive pulse shapers including Fabry-Perot etalons, double-etalons, and classical beam splitters are examined both theoretically and experimentally for their temporal behavior. For temporally and spatially overlapped ...
  • Martin, William Eugene; Johnson, B.C.; Guinn, K.R. (1977)
  • Adams, D.J.; Hough, J. (1977)
  • Martin, William Eugene (1977-04)
    A Fabry-Perot interferometer has been used to produce optical pulses of variable width from a short gaussian input pulse. Pulse stretching of two to five or more times the original pulse width is possible provided a longer ...
  • Martin, William Eugene; Johnson, Bertram C.; Guinn, Kathleen R.; Lowdermilk, W.Howard (1977-06-01)
    Two approaches to the creating of pulse-shaping techniques that meet the requirements associated with operation of a large fusion laser are examined. These techniques are passive pulse-shaping with double-etalone devices ...
  • Kuizenga, D.J.; Martin, William Eugene (1978)
    An actively mode-locked and Q-switched Nd:YAG laser has been developed with pulse widths adjustable from ~100 ps to 1 ns, stability better than ±5%, and a single pulse energy of more than 200 μJ over this range
  • Johnson, B.C.; Guinn, K.R.; Martin, William Eugene; Fountain, Wm.D. (1978)
    A technique has been developed for determining the optical-transmission rise times of subnanosecond switching KD*P electro-optic modulators. Optical streak-camera data with 15-psec overall resolution and 30-psec resolution ...
  • Martin, William Eugene; Milam, D. (1978)
    The temporal dependence of the gain recovery in a Nd-silicate glass amplifier has been directly observed after the passage of a short intense saturating laser pulse. The gain recovery time constant measured for ED-2 glass ...
  • Hough, J.; McCall, A.; Adams, D.J.; Jameson, R.F. (1978)
  • Cox, L.J.; Hough, J.; McCall, A. (1978)
    The design of the Hatfield Polytechnic Observatory's near-infrared (IJHKLM) polarimeter is described and its performance iliustrated by some representative observations on bright standard stars. Preliminary measurements ...
  • Kaye, Paul H.; Ludlow, I.K. (1979)
    A high-speed laser diffractometer is described which employs a novel scanned array or optical light guides to record the angular intensity variation of light scattered radially by a particle throughout an arc of 180 degrees ...

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