Method, system, and device for detecting optical signal-to-noise ratio

摘要

A method for detecting an optical signal-to-noise ratio (OSNR). A wavelength label loading end (11) loads a wavelength label signal in an optical signal, and sends a loading modulation depth of the wavelength label signal to an OSNR detection end (12) through a wavelength label channel or an optical monitoring channel. The OSNR detection end (12) obtains a loading modulation depth of a wavelength label signal loaded in each wavelength optical signal, parses the wavelength label signal to obtain a current modulation depth of the wavelength label signal, and obtains an OSNR value of each wavelength optical signal according to the loading modulation depth and the current modulation depth of the wavelength label signal. A system and device for detecting an OSNR applicable to OSNR tests of present optical signals with high rates of 40 G, 100 G, etc., and in particular to OSNR tests of polarization multiplexing optical signals.

主权项

1. A system for detecting an optical signal-to-noise ratio (OSNR), comprising a wavelength label loader and an OSNR detector, wherein
the wavelength label loader is configured for loading a wavelength label signal of a frequency f1 to an optical signal of a wavelength by modulation encoding using an encoder, and sending a modulation depth corresponding to the wavelength label signal at the wavelength label loader to the OSNR detector; and the OSNR detector is configured for: analyzing the wavelength label signal to acquire a modulation depth corresponding to the wavelength label signal at the OSNR detector; and acquiring, according to the modulation depth corresponding to the wavelength label signal at the OSNR detector and the modulation depth corresponding to the wavelength label signal at the wavelength label loader, an OSNR of the optical signal of the wavelength, wherein the modulation depth corresponding to the wavelength label signal at the wavelength label loader is sent to the OSNR detector via an Optical Supervision Channel (OSC).