Optical waveguides – With optical coupler – Particular coupling function
Patent
1998-09-02
2000-05-23
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling function
385 37, G02B 634
Patent
active
060673915
ABSTRACT:
A high transmission comb-like optical filter structure in wave guiding media is described, an example of which includes multiply periodic modulation of length L=UL.sub.R where U represents an integer number of identical periods of length L.sub.R and L.sub.R is the length of a series of periodically modulated elements of length s.sub.v =M.sub.v d.sub.v, v=1 to V, where M.sub.v is an integer number of cycles of length d.sub.v. Individual filter elements of length s.sub.v of a filter of the invention compared to the reflectors bounding a conventional or series coupled Fabry-Perot cavity exhibit moderate to low reflectivity. Modulation of individual filter elements may be step-wise constant, sinusoidal, or other forms of refractive index modulation.
REFERENCES:
patent: 5170290 (1992-12-01), Land et al.
patent: 5225930 (1993-07-01), Land et al.
Kundert Thomas L.
Lee John D.
Scearce Bobby D.
Song Sarah
The United States of America as represented by the Secretary of
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