Improvements in and relating to analogue maintenance detection

Details Improvements in and relating to analogue maintenance detection Improvements in and relating to analogue maintenance detection

Category

G - Physics

Subcategory

02

Subsubcategory

B

IPC codes

G02B 27/00 (2006.01) H04B 10/08 (2006.01) H04B 10/18 (2006.01) H04J 14/02 (2006.01)

Type

Patent

Patent number

CA 2442375

Description

Methods and apparatus are described for processing an optical signal. The optical signal comprises at least a first channel signal at a first wavelength modulated by a first frequency, a second channel signal at a second wavelength modulated by a second frequency, and a third channel signal at a third wavelength modulated by a third frequency. The method includes receiving the optical signal, and splitting the received optical signal into at least two optical bands, a first optical band comprising the first and second channel signals, and a second optical band comprising the third channel signal. A first electrical signal is formed, proportional to the total optical power of the first optical band.

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