Jeffrey I. Hirsh
Eastman Kodak Company
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Featured researches published by Jeffrey I. Hirsh.
Optics Letters | 1995
Lifeng Li; Jeffrey I. Hirsh
We made a high-efficiency ref lection grating by coating a nine-layer quarter-wave system of ZnS/Na(3)AlF(6) directly onto a surface-relief grating in photoresist. Eff iciencies of 70% and 84% were measured at the firstorder Littrow mount with the laser beam incident from the air side and from the substrate side, respectively. The experimental results are in qualitative agreement with theoretical predictions. The key to further improvement in the diffraction eff iciency is to improve the contour conformation of the coated dielectric layers.
SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation | 1994
Alan C. G. Nutt; Joseph F. Revelli; Sharlene A. Wilson; Jeffrey I. Hirsh; David A. Roberts; Stephen P. Barry
This paper describes a channel waveguide beam splitter (CWBS) in which a single laser beam can be split into many beams using glass stripe waveguides and localized surface relief gratings. The grating element situated on top of individual 90 degree(s) T-branches couples a fraction of the backbone light down a side channel and acts as a miniature mode converter. Single-mode TE light in the backbone is converted into single-mode TM light in the side channel. The laser wavelength used in these experiments was 830 nm. Each individual grating was only a few microns in length and so the grating acceptance exhibited a large bandwidth. The total excess loss coupling the input waveguide optical power partially into 100 waveguide branches was only 0.25 dB.
Archive | 1995
Joseph F. Revelli; Jeffrey I. Hirsh; Joseph Jech; Douglas R. Robello; Stephen P. Barry; Alan C. G. Nutt
Archive | 2000
Ravi Sharma; Jeffrey I. Hirsh; Gilbert A. Hawkins
Archive | 2001
Ravi Sharma; Gilbert A. Hawkins; Jeffrey I. Hirsh
Archive | 1999
Jeffrey I. Hirsh; Edwin A. Mycek; Larry L. Lapa
Archive | 1998
Jeffrey I. Hirsh; Joseph F. Revelli; Alan C. G. Nutt
Archive | 1998
Jeffrey I. Hirsh; Xin Wen
Archive | 2000
Jeffrey I. Hirsh; Edwin A. Mycek; Larry L. Lapa
Archive | 1996
Douglas R. Robello; Joseph F. Revelli; Jeffrey I. Hirsh