Publications [#246583] of Bobby D Guenther

Papers Published
  1. Stone, T; George, N; Guenther, BD, Index variation and scattering in a holographic medium, Proc. SPIE - Int. Soc. Opt. Eng. (USA), vol. 1136 (1989), pp. 35-44 .

    In the fabrication of holographic optical elements, it is important to have careful characterization of the recording medium. Hence, the authors have made measurements of the increment in the index of refraction vs. exposure for DMP-128 manufactured by Polaroid corporation. The results of measurements are presented for a series of holographic diffraction gratings. A novel spectrometer technique that provides a simultaneous measure of both thickness and refractive index is described. Data illustrating its use are presented for the holographic photopolymer. The feasibility of filling voids in the processed photopolymer for device applications was demonstrated by construction of a distributed feedback dye laser in a DMP-128 grating. At high spatial frequencies, diffraction efficiency is used to estimate refractive index variations. As an initial finding, the authors report a rather large modulation in the index of refraction of 0.2 at 1000 cycles/mm