In-line regenerating apparatus for regenerating a soliton-convey

Details In-line regenerating apparatus for regenerating a soliton-convey In-line regenerating apparatus for regenerating a soliton-convey

1995-12-12

1998-05-26

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359158, 359181, 359188, 359156, H04B 1016, H04B 1004

Patent

active

057575290

ABSTRACT:
The apparatus of the invention regenerates solitons in-line by synchronously modulating the solitons using a non-linear optical loop mirror as an optical modulator, the NOLM modulator being controlled by a clock signal recovered from the soliton signal by clock recovery means which may be all-optical means or electro-optical means. The NOLM includes an input coupler which may be a 50/50 coupler or an asymmetrical coupler. Said input coupler may be a 2x2 coupler or a 3x3 coupler. In a particular embodiment, the regenerating system further includes a plurality of optical amplifiers and a plurality of "guiding" filters. Application to long-distance soliton optical telecommunications.

REFERENCES:
patent: 5309267 (1994-05-01), Huang
patent: 5369520 (1994-11-01), Avramopoulos et al.
patent: 5548433 (1996-08-01), Smith
Lucek et al., "All Optical Signal Regenerator" Optics Letters, vol. 18, No. 15, Aug. 1, 1993.
Nakazawa et al, "80GBit/s Soliton Data Transmission Over 500KM with Unequal Amplitude Soitons for Timing Clock Extraction", Electronics Letters, vol. 30, No. 21, Oct. 13, 1994, pp. 1777/1778 XP 000476409.
Jinno M et al, "All-Optical Regenerator Based on Nonlinear Fibre Sagnac Interferometer", Electronics Letters, vol. 28, No. 14, Jul. 2, 1992, pp. 1350-1352, XP 000307842.
Sandel D et al, "Polarization-independent Regenerator with Nonlinear Optoelectronic Phase-Locked Loop", Optical Fiber Communication, OFC'94, Technical Digest, vol. 4, No. FG2, Feb. 20-25, 1994, pp. 310-311.

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