Optical distribution system having time switch

Details Optical distribution system having time switch Optical distribution system having time switch

1997-08-04

1998-08-04

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

385 16, 348 6, 370390, 370432, 34082503, 455 31, H04J 1408

Patent

active

057902909

ABSTRACT:
Optical paths to propagate a plurality of optical information signals intersect optical paths to transmit light signals to a plurality of subscribers. Light power dividing and propagation direction changing devices for separating requested optical information signals are arranged at the intersecting points. Losses of the optical information signals, due to the separation, are compensated by optical amplification, so that the signals can be distributed to all of the subscribers while maintaining a predetermined intensity. Thus, the same photosignal can be distributed to a plurality of subscribers. The system can be easily expanded in correspondence to an increase in the number of optical information signals and an increase in the number of subscribers.

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patent: 5276425 (1994-01-01), Swanson et al.
patent: 5365519 (1994-11-01), Kozaki et al.
Transactions of the Institute of Electronics, Information and Communication Engineers of Japan, vol. E75-B, No. 4, Apr. 1992, Tokyo, JP, pp. 235-242, S. Suzuki et al.: Trend of Photonic Switching Systems.
S. Suzuki et al. "Photonic Space Division Switching System fFor Broadband Services" Proceedings International Switching Symposium, May 28-Jun. 1, 1990, vol. 1, pp. 153-158.
Minoru Akiyama, et al., "Digital Telephone Exchange" (1986), Journal of Lightwave Technology, vol. 9, No. 7 (1991) pp. 871-877.
Journal of Selected Areas in Communications, No. 7 (1988), pp. 1248-1254.

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