Single and multichannel transmission over long distances using r

Details Single and multichannel transmission over long distances using r Single and multichannel transmission over long distances using r

1994-11-29

1996-01-09

Boudreau, Leo H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359124, 359176, 359179, 375211, 370 131, 455 14, H04B 1012

Patent

active

054833728

ABSTRACT:
A long transmission link for two-level information which is interrupted at spaced intervals in order that the signal's level-crossing information may be extracted and passed on. This level-crossing remodulation process discards amplitude information and retains and retransmits only the times of level crossing. By making the receiver of each remodulator sufficiently wide-banded, the overall link is protocol and bit rate independent in the sense that it can pass any of a wide variety of binary digital signals without requiring reclocking at each stage as is done with conventional regenerators. The preferred embodiment includes an application to multi-wavelength long optical transmission links, and this multi-channel approach avoids many problems associated with optical amplifiers.

REFERENCES:
patent: 5392313 (1995-02-01), Noro
E. D. Sunde, "Self-Timing Regenerative Repeaters," The Bell System Technical Journal, Jul. 1957, pp. 891-929.
A. F. Elrefaie, "Multiwavelength Survivable Ring Network Architectures," IEEE, 1993, pp. 1245-1251.
Patrick R. Trischitta and Eve L. Varma, Jitter in Digital Transmission Systems, 1989, pp. 1-47.

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