Device for measuring and dynamically compensating power loss variations within an optical transmission line with supervision channel and associated method

摘要

A detector (5) detects input supervisory signals having preset optical power at exit end (S) and determines signal optical power. The supervisory signal optical power loss in fiber (2) obtained based on determined and preset optical powers, is compared with nominal power loss. When power losses varies with respect to each other, a controller (9) modifies power of primary signals input along with supervisory signals. Independent claims are also included for the following: (1) optical signal transmission installation; and (2) method of measuring and dynamically compensating power loss variation.