CATV uplink optical transmission system

Details CATV uplink optical transmission system CATV uplink optical transmission system

2003-05-14

2009-10-13

Kelley, Christopher (Department: 2424)

Interactive video distribution systems

Video distribution system with upstream communication

Transmission network

C725S119000, C725S129000

Reexamination Certificate

active

07603693

ABSTRACT:
A CATV station apparatus subjects received optical signals to processes such as optical-electrical conversion, signal separation, coupling, and demodulation for obtaining an uplink signal. A received photocurrent monitoring section compares a received photocurrent at a optical receiving section with a predetermined reference current. If the received photocurrent is equal to or higher than the reference current, an amplifying section amplifies a signal output from a signal separating section at a predetermined level. If the received photocurrent is lower than the reference current, on the other hand, it is determined that a non-linear phenomenon, such as stimulated Brillouin scattering, has occurred in an optical fiber. The amplifying section then outputs a signal at a level which does not affect, even after being coupled with other signals, communications performed by other optical transmission systems.

REFERENCES:
patent: 5646763 (1997-07-01), Misaizu et al.
patent: 5657143 (1997-08-01), Hajj et al.
patent: 5850400 (1998-12-01), Eames et al.
patent: 5864672 (1999-01-01), Bodeep et al.
patent: 5900959 (1999-05-01), Noda et al.
patent: 5963844 (1999-10-01), Dail
patent: 6457178 (2002-09-01), Slim
patent: 6490727 (2002-12-01), Nazarathy et al.
patent: 6523177 (2003-02-01), Brown
patent: 7162732 (2007-01-01), Ovadia
patent: 2003/0063352 (2003-04-01), Farhan et al.
patent: 2005/0114906 (2005-05-01), Hoarty et al.
patent: 0 506 163 (1992-09-01), None
patent: 0 863 626 (1998-09-01), None
patent: 0 926 846 (1999-06-01), None
patent: 6-244799 (1994-09-01), None
patent: 7-202991 (1995-08-01), None
patent: 8-172401 (1996-07-01), None
patent: 9-83451 (1997-03-01), None
patent: 9-312618 (1997-12-01), None
patent: 10-65627 (1998-03-01), None
patent: 10-112689 (1998-04-01), None
patent: 11-284999 (1999-10-01), None
patent: 2000-236296 (2000-08-01), None

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