Optical waveguides – With optical coupler – Particular coupling function
Patent
1998-05-21
2000-11-28
Healy, Brian
Optical waveguides
With optical coupler
Particular coupling function
385 27, 385 28, 385 38, 385 39, 385123, 385 88, G02B 626
Patent
active
061545899
ABSTRACT:
A method for improving modal bandwidth in computer networks using multimode optical fiber and single mode sources is disclosed in which the optical signal from a center of the optical fiber is blocked from reaching detector. This is accomplished according to a number of different techniques including the use of opaque spots on the fiber media/fiber couplers or the use of dark-cored fiber couplers. These configurations prevent pulse splitting that occurs in single mode source/multimode fiber systems by preventing light from the multimode fiber's center from interfering with the detector. When this is achieved, the detector is insulated from the effects of any pulse splitting, supporting data rates of greater than one GBPS by increasing the modal bandwidth.
REFERENCES:
patent: 3777150 (1973-12-01), Miller
patent: 3780295 (1973-12-01), Kapron et al.
patent: 4050782 (1977-09-01), Uchida et al.
patent: 4281893 (1981-08-01), Yamada et al.
patent: 4723828 (1988-02-01), Garel-Jones et al.
patent: 4942623 (1990-07-01), Asawa et al.
patent: 5003623 (1991-03-01), Asawa
patent: 5416862 (1995-05-01), Haas et al.
patent: 5559053 (1996-09-01), Choquette et al.
patent: 5659568 (1997-08-01), Wang et al.
patent: 5732170 (1998-03-01), Okude et al.
Hahn, K.H., et al., "Large Area Multitransverse-Mode VCSELS for Modal Noise Reduction in Multimode Fibre Systems" Electronic Letters, vol. 29, No. 16 (1993) pp. 1482/1483 XP000654608.
Stryckman, D., et al., "Improvement of the Lateral-Mode Discrimination of Broad-Area Diode Lasers with a Profiled Reflectivity Output Facet" Applied Optics, vol. 35, No. 30 (1996) pp. 5955-5959 XP000630964.
DeBaun, B.A., et al., "Direct VCSEL Launch into Large Core Multimode Fiber: Enhancement of the Bandwidth Distance Product", Proceedings of the SPIE, The International Society of Optical Engineering, Proceedings of the Conference, Vertical Cavity Surface Emitting Lasers, San Jose, CA USA 13-14 (1997) vol. 3003, pp. 142-145, XP002116048.
Marcuse, D., "Calculation of bandwidth from index profiles of optical fibers, 1. Theory," Applied Optics., vol. 18, No. 12, 2073-2080 (1979).
Presby, H.M., Marcuse, D., Cohen, L.G., "Calculation of bandwidth from index profiles of optical fibers," Applied Optics., vol. 18, No. 19, 3249-3255 (1979).
Hutchison Jerry D.
Kirk Richard L.
Schofield Bruce A.
Cabletron Systems Inc.
Healy Brian
LandOfFree
Method and system for removal of low order optical transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for removal of low order optical transmission , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for removal of low order optical transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1734001