Method and apparatus for measuring and estimating optical...

Details Method and apparatus for measuring and estimating optical... Method and apparatus for measuring and estimating optical...

2005-06-14

2005-06-14

Sedighian, M. R. (Department: 2633)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S025000

Reexamination Certificate

active

06907197

ABSTRACT:
A WDM optical network comprising a plurality of nodes has a first apparatus for optical analysis at the site of a first optical amplifier upstream of the first node, a second apparatus for optical analysis at the site of a second optical amplifier at the downstream output of the first node, and a third apparatus for optical analysis at the site of a third optical amplifier further downstream of the first node, where knowledge of the optical sin to noise ratio (OSNR) is desired. The first, second and third apparatus are for measuring the signal level at frequencies both at and in-between the channel frequencies. The signal levels at the channel frequencies and between the channel frequencies at the first, second and third apparatus are used to derive the OSNR at the third apparatus. This enables the OSNR to be measured accurately at any site in the network, using calculations in which noise shaping of the nodes can be factored in to the calculation of OSNR.

REFERENCES:
patent: 5297154 (1994-03-01), Heidemann et al.
patent: 5301054 (1994-04-01), Huber et al.
patent: 5321707 (1994-06-01), Huber
patent: 5712716 (1998-01-01), Vanoli et al.
patent: 6115157 (2000-09-01), Barnard et al.
patent: 6215565 (2001-04-01), Davis et al.
patent: 6317231 (2001-11-01), Al-Salameh et al.
patent: 6466342 (2002-10-01), Frigo et al.
patent: 6654561 (2003-11-01), Terahara et al.

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