EP 1073919 A1 20010207 - Optical communication system with segmented diffraction gratings
Title (en)
Optical communication system with segmented diffraction gratings
Title (de)
Optisches Übertragungssystem mit segmentierten Beugungsgittern
Title (fr)
Système de communication optique utilisant des réseaux de diffraction segmentés
Publication
Application
Priority
- US 9907391 W 19990423
- US 8298998 P 19980424
- US 11533198 A 19980714
Abstract (en)
[origin: WO9956159A1] Methods and apparatus are disclosed that apply a predetermined complex-valued spectral transfer function to an input optical field to produce an output field that propagates in an output direction. Methods for making such apparatus are also disclosed. Segmented gratings (1915, 1916, 19a15, 19a16) fabricated according to one example comprise a series of spatially distinct subgratings arrayed end to end. Each subgrating possesses a periodic array of diffraction structures, such as lines or other elements. The transfer functions of such segmented gratings are determined by controlling (a) the spatial periodicity or frequency of each subgrating, (b) the amplitude of each subgrating, (c) the spacing between the last diffraction structure (or line) on each subgrating and the first diffraction structure (or line) of the successive subgrating, and (d) the optical path length and transparency through each subgrating, or each subgrating plus additional material layers utilized to control optical path length and transparency. Communication systems using such segmented gratings are also provided.
IPC 1-7
IPC 8 full level
G02B 5/18 (2006.01); G02B 6/34 (2006.01); G02B 27/44 (2006.01); G06K 9/74 (2006.01); H04B 10/00 (2013.01); H04B 10/02 (2006.01); H04B 10/28 (2006.01); H04B 10/40 (2013.01); H04B 10/43 (2013.01); H04B 10/50 (2013.01); H04B 10/60 (2013.01); H04J 14/00 (2006.01); H04J 14/04 (2006.01); H04J 14/06 (2006.01)
CPC (source: EP US)
G02B 5/1814 (2013.01 - EP); G02B 6/29311 (2013.01 - EP US); H04J 14/005 (2013.01 - EP); G02B 6/02085 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9956159 A1 19991104; CA 2330109 A1 19991104; CA 2330109 C 20040203; EP 1073919 A1 20010207; EP 1073919 A4 20050518; JP 2002513166 A 20020508; JP 4530536 B2 20100825
DOCDB simple family (application)
US 9907391 W 19990423; CA 2330109 A 19990423; EP 99918461 A 19990423; JP 2000546265 A 19990423