Optical repeater having phase inversion circuit

Details Optical repeater having phase inversion circuit Optical repeater having phase inversion circuit

1990-10-03

1992-03-17

Wieder, Kenneth A.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

375 3, H04B 1016

Patent

active

050973533

ABSTRACT:
An optical repeater includes a first converter converting an optical input signal into an electrical signal, an equalizing amplifier which amplifies the electrical signal and which outputs an amplified electrical signal, and a timing extraction circuit which extracts a timing signal from the amplified electrical signal. Also the optical repeater includes a phase inversion circuit which receives the amplified electrical signal in synchronism with the timing signal and which outputs a phase-inverted signal in synchronism with the timing signal. The phase-inverted signal has a phase opposite to a phase of the amplified electrical signal. Further, the optical repeater includes a second converter having a diffused laser diode and converting the phase-inverted signal into an optical output signal, and a supervisory signal extraction circuit which extracts a supervisory signal contained in the optical input signal from the phase-inverted signal. The optical input signal includes a digital signal formed of a plurality of blocks. Each block has data composed of (2m+1) bit (where m is an integer) and one-bit parity so that each block is formed of a (2m+1)B1P code having an even parity.

REFERENCES:
patent: 4698826 (1987-10-01), Denhez et al.
patent: 4710976 (1987-12-01), Wakabayashi et al.
J. C. Mouly, "Systematic Jitter Suppression by Pattern Inversion", Electronics Letters, 1st Aug. 1985, vol. 21, No. 16, pp. 709-710.

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