Beam splitter and optical coupler using the same

Details Beam splitter and optical coupler using the same Beam splitter and optical coupler using the same

1994-12-14

1997-04-15

Ngo, John

Optical waveguides

With optical coupler

Particular coupling structure

359586, G02B 626

Patent

active

056218320

ABSTRACT:
A beam splitter is an optical multilayer film obtained by sequentially stacking first to fifth layers respectively having refractive indexes of n.sub.1 to n.sub.5 and geometrical thicknesses d.sub.1 and d .sub.5 on a substrate having a refractive index n.sub.G. The refractive indexes of the substrate and the first to fifth layers satisfy any one of a relationship of n.sub.G =1.45 to 1.60, n.sub.1 =2.02 to 2.20, n.sub.2 =2.25 to 2.38, n.sub.3 =1.44 to 1.47, n.sub.4 =2.25 to 2.38, and n.sub.5 =1.44 to 1.47, a relationship of n.sub.G =1.45 to 1.60, n.sub.1 =1.44 to 1.47, n.sub.2 =2.25 to 2.38, n.sub.3 =1.44 to 1.47, n.sub.4 =2.25 to 2.38, and n.sub.5 =2.02 to 2.20, and a relationship of n.sub.G =1.45 to 1.60, n.sub.1 =1.44 to 1.47, n.sub.2 =2.25 to 2.38, n.sub.3 =2.02 to 2.20, n.sub.4 =2.25 to 2.38, and n.sub.5 =1.44 to 1.47, and a geometrical thickness d.sub.i of an ith layer of the first to fifth layers satisfies relation n.sub.i d.sub.i cos (.theta..sub.i)=.lambda./4, where n.sub.i is a refractive index of the ith layer, .theta..sub.i is an angle of refraction in the ith layer, and .lambda. is a center wavelength of an incident light beam to the multilayer film with an angle of incidence of 40.degree. to 50.degree..

REFERENCES:
patent: 3858965 (1975-01-01), Sumita
patent: 4367921 (1983-01-01), Sawamua et al.
patent: 5400179 (1995-03-01), Ito
Hiroaki Matsuda and Hideki Noda, "A Polarization-Independent Optical Coupler Film", Proceedings of the 1993 IEICE Spring Conference, Part 4, Communications Electronics, The Institute of Electronics, Information and Communication Engineers, Mar. 28-31, 1993, Nagoya University, total three pages.

Affiliated with

Also associated with

Rating

Beam splitter and optical coupler using the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Beam splitter and optical coupler using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Beam splitter and optical coupler using the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-367916