Title:
【発明の名称】光空間スイッチ
Document Type and Number:
Japanese Patent JP2788040
Kind Code:
B2
Abstract:
An optical space switch is used in a centralised switching system for an optical network and connects light from one of a number of inputs (1) to a selected one of a number of outputs (6). The switch includes a number of multiplexed phase volume holograms (4), a spatial light modulator (3) for imposing a selected phase change on light passing through it, distribution means (2) for coupling light from the inputs (1) via the spatial light modulator (3) to the multiplexed phase volume holograms (4), and collection means (5) for collecting light diffracted by the multiplexed phase volume holograms (4). Each multiplexed phase volume hologram (4) diffracts light to a selected output (6) in dependence upon the phase change imposed by the spatial light modulator (3) on the light incident upon that hologram (4).
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Inventors:
HAAREI PIITAA
SUMISU DABITSUDO UIRIAMU
SUMISU DABITSUDO UIRIAMU
Application Number:
JP50194188A
Publication Date:
August 20, 1998
Filing Date:
February 18, 1988
Export Citation:
Assignee:
BURITEITSUSHU TEREKOMYUNIKEESHONZU PLC
International Classes:
G02F1/31; G02F1/33; G02F1/01; G03H1/00; H04B10/2581; H04B10/27; H04J14/00; H04Q3/52; (IPC1-7): G02F1/31; G02F1/33
Domestic Patent References:
| JP51135308A | ||||
| JP61501673A |
Attorney, Agent or Firm:
Takehiko Suzue (2 outside)