Coherent light generators – Particular beam control device – Tuning
Reexamination Certificate
2008-07-01
2008-07-01
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular beam control device
Tuning
C372S096000
Reexamination Certificate
active
07394838
ABSTRACT:
A control (20) and a method of controlling a tunable laser having a gain section (4), a phase change section (5) and a segmented Bragg grating reflector section (6) comprising a series of grating units (9-17) each of a different pitch, and an electrode (9a-17a) associated with each grating so that an electrical current is applicable to each individual grating. The control (20) includes a plurality of digitally controlled sources (31, 32) of electrical current which are each connected to switch means (33or35, 36) operable to independently connect each of said sources (31, 32) to a respective electrode (e.g.11aor12a) associated with a grating (e.g.11or12) which is one of a subset of consecutive gratings (e.g.11&12) selected from said series of grating units (9-17).
REFERENCES:
patent: 4813054 (1989-03-01), Plumb
patent: 4829535 (1989-05-01), Utaka
patent: 5379318 (1995-01-01), Weber
patent: 5581572 (1996-12-01), Delorme et al.
patent: 5642371 (1997-06-01), Tohyama et al.
patent: 5838714 (1998-11-01), Delorme
patent: 0 529 732 (1994-11-01), None
patent: WO-03/012936 (2003-02-01), None
Optical Fibre Communication Conference 2000, Mar. 7-10, 2000, vol. 2, pp. 338-340, “Fast and fine wavelength tuning of a GCSR laser using a digitally controlled driver,” Fukashiro et al, see fig. 2a.
Journal of Lightwave Technology, Jul. 1999, vol. 17, issue 7, pp. 1222-1228, “A high-speed mixed digital-to-analog circuit board for accurate control of wavelength tunable lasers for fibre-optic communications,” Biemacki et al, see fig 3.
Borley Steven James
Carter Andrew Cannon
Bookham Technology PLC
Harvey Minsun
Lahive & Cockfield LLP
Laurentano, Esq. Anthony A.
Nguyen Tuan N.
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