Optical waveguides – Planar optical waveguide – Thin film optical waveguide
Reexamination Certificate
2007-02-06
2007-02-06
Pak, Sung (Department: 2883)
Optical waveguides
Planar optical waveguide
Thin film optical waveguide
C385S132000, C385S029000
Reexamination Certificate
active
10398830
ABSTRACT:
The invention concerns a guided wave spatial filter (300) for receiving input radiation and outputting corresponding filtered output radiation, the filter comprising first and second waveguide sections (30,L3,L5) connected in series, the sections: (a) mutually matched for transmitting fundamental mode radiation components present in the input radiation therethrough to provide the output radiation; and (b) mutually mismatched for hindering higher-order mode radiation components present in the input radiation from propagating therethrough and contributing to the output radiation. The spatial filter (300) is implemented using rib waveguides (30) for the sections with associated relatively deeply and relatively shallowly etched structures (20, 310, 320) for imparting to the sections their radiation mode filtration characteristics. The spatial filter according to the invention can be incorporated into optical splitters and optical modulators to enhance their performance and desensitise them to higher-order mode radiation injected thereinto.
REFERENCES:
patent: 4776655 (1988-10-01), Robertson et al.
patent: 4999686 (1991-03-01), Autier et al.
patent: 5093884 (1992-03-01), Gidon et al.
patent: 5109464 (1992-04-01), Munowitz et al.
patent: 5333000 (1994-07-01), Hietala et al.
patent: 5745614 (1998-04-01), Kersten et al.
patent: 5748811 (1998-05-01), Amersfoort et al.
patent: 6111998 (2000-08-01), Ido et al.
patent: 6621972 (2003-09-01), Kimerling et al.
patent: 0 363 076 (1996-01-01), None
patent: 09 005 549 (1997-01-01), None
patent: 10 073 791 (1998-03-01), None
patent: 2000-98148 (2000-04-01), None
Bookham Technology plc
Lahive & Cockfield LLP
Laurentano, Esq. Anthony A.
Pak Sung
Wong Eric
LandOfFree
Guided wave spatial filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Guided wave spatial filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Guided wave spatial filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3815181