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Proceedings Paper

Holographic microlenses for optical fiber interconnects
Author(s): Peter C. M. Galloway; Peter J. Dobson
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Paper Abstract

A new technique is presented for the recording of small holographic lenses in silver halide emulsion for replay in the near infrared region. The work described was carried out with a view to producing lenses for optical fiber interconnection for which the preferred wavelength is in the 1200-l600nm band. The sensitivity of holographic materials only to light in the visible region required that recording was at a different wavelength from replay. The effect of this wavelength shifting was to give an aberration on replay1''2''3. An emulsion was selected and assessed for its suitability for the replay requirement of the holographic optical element. The use of optical fibres to produce the recording beams led to a compact exposure geometry. The purpose of the experiment was to find out what order of fiber to fiber coupling efficiency could be obtained using an established holographic emulsion in a feasibility test. 2. Material Silver halide material for which techniques have been well established was chosen as the recording medium its easily controlled processing leading to good repeatability of results. Kodak 649-F film was readily available and because of its l7jim thickness which is large for silver halide emulsion it has an advantage in terms of the volume diffraction effect. However the high sensitivity of this film over virtually the whole of the visible region meant that recording and processing had to be carried out in

Paper Details

Date Published: 1 January 1991
PDF: 8 pages
Proc. SPIE 1365, Components for Fiber Optic Applications V, (1 January 1991); doi: 10.1117/12.24669
Show Author Affiliations
Peter C. M. Galloway, Oxford Univ. (United Kingdom)
Peter J. Dobson, Oxford Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 1365:
Components for Fiber Optic Applications V
Paul M. Kopera, Editor(s)

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