Systems and Methods for Burst Detection in a CATV Network

Patent metadata

Field	Value
Publication number	US-2016248507-A1
Application number	US-201615144202-A
Country	US
Kind code	A1
Filing date	May 2, 2016
Priority date	Apr 21, 2014
Publication date	Aug 25, 2016
Grant date	—

Abstract

Systems and methods for detecting laser transmission bursts in a CATV network.

First claim

1 - 6 . (canceled)

7 . An active optical combiner comprising:
a plurality of inputs, each capable of receiving an upstream optical signal; a combiner that combines received upstream optical signals to create a combined signal; a transmitter that receives the combined signal and converts it to an optical signal at an output; and a controller for the transmitter that monitors the plurality of inputs, and controls the output of the transmitter using received said upstream optical signals.

8 . The active optical combiner of claim 7 including an amplifier that receives at least one of the received said upstream optical signals as an input and outputs an amplified signal to the transmitter.

9 . The active optical combiner of claim 8 where the controller controls the output of the transmitter by adjusting a bias of the amplifier.

10 . The active optical combiner of claim 7 where the controller includes a detector circuit having a first port connected to one of said plurality of inputs and a second port connected to an RF amplifier.

11 . The active optical combiner of claim 10 where a detector circuit with multiple detectors is arranged in a transmission line characterized in that the parasitic capacitance of each detector is inductively matched to a transmission line impedance and the transmission line is connected to a first port that puts out an RF signal and a second port that is connected to the detector circuit by an RF termination resistance having an impedance substantially equal to that of the transmission line, where the second port is connected to a current detection circuit that can detect the presence of photo-current in one or more of the detectors in order to detect the presence of optical power.

12 . The active optical combiner of claim 11 including a high pass filter between the first port and the RF amplifier.

13 . The active optical combiner of claim 12 where the detector circuit includes a trans-impedance amplifier.

14 . The active optical combiner of claim 13 where the trans-impedance amplifier is connected to the high pass filter.

15 . The active optical combiner of claim 14 including a low pass filter that presents a low impedance, less than the transmission line impedance, at the input to the trans-impedance amplifier.

Assignees

• Arris Entpr Llc

Inventors

• Schemmann Marcel
• Mutalik Venkatesh G

Classifications

• H04B10/272

  Star-type networks {or tree-type networks} · CPC title

• H04B10/58

  Compensation for non-linear transmitter output · CPC title

• H04N7/22

  Adaptations for optical transmission · CPC title

• H04B10/25751 Primary

  Optical arrangements for CATV or video distribution (adaptations of television systems for optical transmission H04N7/22) · CPC title

• H04B10/27

  Arrangements for networking · CPC title