In-band optical signal-to-noise ratio detection method and device
A technology of optical signal-to-noise ratio and detection method, applied in the field of optical communication, can solve the problems of unsuitable PDM system, slow scanning speed, and high cost of polarization devices, and achieve the effect of reducing detection cost, speeding up detection speed, and wide detection applicability
Active Publication Date: 2015-11-25
HUAWEI TECH CO LTD
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Problems solved by technology
[0017] Embodiments of the present invention provide a detection method and device for in-band optical signal-to-noise ratio, which can solve the problems of high cost of polarization devices in the prior art, slow scanning speed and unsuitability for PDM systems; and are suitable for signal bandwidths close to DWDM system with a channel bandwidth of 40Gb / s or more and a rate of 50GHz
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[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0059] The detection method of the in-band optical signal-to-noise ratio provided by the embodiment of the present invention, such as figure 1 As shown, the method steps include:
[0060] S101. Obtain the signal power P of the first optical signal at the transmitting end CW1 , and the signal power P of the second optical signal at the transmitting end CW2 , and the total signal power P of the channel where the first and second optical signals are located S ;
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The present invention relates to the field of optical communication. A method and a device for detecting Inband Optical Signal to Noise Ratio (OSNR) are provided in the present invention, wherein the method includes the following steps: obtaining a signal power P CW1 of a first optical signal at a transmitting end, a signal power P CW2 of a second optical signal at the transmitting end, and a total signal power P S ; obtaining a ratio k1 of the P CW2 to the P S and a ratio k2 of the P CW1 to the P CW2 according to the P CW1 , P CW2 and P S ; obtaining a signal power P' CW1 of the first optical signal at a detection point and a signal power P' CW2 of the second optical signal at the detection point; obtaining a ratio K3 of the P' CW1 to the P' CW2 according to the P' CW1 and the P' CW2 ; and obtaining the Optical Signal to Noise Ratio according to the k1, k2, and k3. The present invention is able to reduce device cost, increase scanning speed and exhibit wide applicability.
Description
technical field [0001] The invention relates to the field of optical communication, in particular to a method and device for detecting an in-band optical signal-to-noise ratio. Background technique [0002] Due to the emergence of large-capacity services, the optical communication backbone network tends to evolve from 10Gb / s to 40Gb / s and above, and the channel spacing gradually evolves from 100GHz to 50GHz. In addition, the optoelectronic-optical conversion in the link tends to decrease, which makes it more and more difficult to directly detect the bit error rate at the electrical layer, but only detecting the bit error rate at the link terminal is not conducive to fault location. With the extensive application of 40Gb / s and above rate signals in commercial networks, in order to effectively control and manage optical networks, optical performance monitoring (Optical Performance Monitoring, OPM) is performed on high-speed dense wavelength division multiplexing (DenseWaveleng...
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Login to View More IPC IPC(8): H04B10/077H04B10/079
CPCH04B10/07953H04B10/0775
Inventor 刘宁
Owner HUAWEI TECH CO LTD