06088144 is referenced by 20 patents and cites 13 patents.

An apparatus and method for detecting a channel of a fiber-optic system. According to one embodiment, a filter is adapted to receive an electromagnetic signal resulting from modulation of a carrier frequency over a frequency range by a modulation signal. The filter has a plurality of transmissivity peaks over the frequency range, whereby the filter generates a plurality of intensity pulses as frequency of the electromagnetic signal varies over the frequency range. A detector is adapted to detect the modulation signal based on the plurality of intensity pulses. According to another embodiment, an electromagnetic signal corresponding to a channel and resulting from modulation of a carrier frequency over a frequency range by a modulation signal is received. A plurality of intensity pulses are generated as frequency of the electromagnetic signal varies over the frequency range, and the channel is detected in accordance with the intensity pulses.

Title
Detection of frequency-modulated tones in electromagnetic signals
Application Number
8/713491
Publication Number
6088144
Application Date
September 13, 1996
Publication Date
July 11, 2000
Inventor
Christopher Richard Doerr
Atlantic Highlands
NJ, US
Agent
Steve Mendelsohn
Assignee
Lucent Technologies
NJ, US
IPC
H04B 10/06
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