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Proceedings Paper

Demonstration of single mode fiber holographic interconnect with reconfigurable photothermoplastic holograms
Author(s): Philippe Gravey; Leon Bonnel
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Paper Abstract

An experimental 16 to 16 single mode fiber interconnect is being implemented. The switch structure involves the deflection of the incoming channels by two successive photothermoplastic holograms situated among two linear arrays of sixteen 650 by 650 micrometers holograms, with a 750 micrometers spacing. A reconfiguration time shorter than 10 ms for one couple of interconnection holograms has been demonstrated, with a diffraction efficiency exceeding 20% at a readout wavelength of 1.32 micrometers . Linear fiber and microlens arrays are required to perform a global collimation of all incoming and outgoing beams. We have interconnected two 16 fiber arrays situated at a distance of 12 cm (compatible with the holographic switch design) with 8 dB connection losses by using arrays of refractive microlenses of 2.9 mm focal length. Thus, in the final system the overall losses can be kept lower than 25 dB, which is compatible with optical amplification. An optical addressing system has been designed for the reconfiguration of the holograms. It involves two bi- dimensional deflection subsystems. The first one is based on two acousto-optic deflectors and performs the control of the grating period; the second one involves to moving mirrors and allows to select what hologram is to be exposed. The global reconfiguration time (for the 32 holograms) is expected to be lower than 100 ms.

Paper Details

Date Published: 12 April 1995
PDF: 6 pages
Proc. SPIE 2406, Practical Holography IX, (12 April 1995); doi: 10.1117/12.206211
Show Author Affiliations
Philippe Gravey, France Telecom/CNET (France)
Leon Bonnel, France Telecom/CNET (France)


Published in SPIE Proceedings Vol. 2406:
Practical Holography IX
Stephen A. Benton, Editor(s)

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