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Apparatus and method for testing optical signal-noise ratio in optical amplifier transmission link

A technology of transmission link and optical signal-to-noise ratio, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve the problem of inability to test the optical signal-to-noise ratio of optical transmission systems

Inactive Publication Date: 2011-07-13
ZTE CORP
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the shortcoming that the common optical amplifier (OA) noise figure tester cannot test the optical signal-to-noise ratio of the optical transmission system, and proposes an in-band method to test the optical signal-to-noise ratio of the optical transmission system device, a test method is proposed accordingly

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  • Apparatus and method for testing optical signal-noise ratio in optical amplifier transmission link
  • Apparatus and method for testing optical signal-noise ratio in optical amplifier transmission link
  • Apparatus and method for testing optical signal-noise ratio in optical amplifier transmission link

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Embodiment Construction

[0029] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] First give the content indicated by the mark in the figure:

[0031] 1, 2: The system under test;

[0032] A: optical amplifier;

[0033] B: comparator;

[0034] C, C': control pulse generator;

[0035] D, E: beam splitter;

[0036] DCN: data communication network;

[0037] DMUX: wave splitter;

[0038] F1, F2: test optical interface;

[0039] I: instruction generator;

[0040] K: Pulse light signal generator;

[0041] L: optical fiber transmission line;

[0042] M: spectrometer;

[0043] MUX: multiplexer;

[0044] O / E: photoelectric converter;

[0045] Rx: optical receiver;

[0046] S: optical switch;

[0047] T: trigger;

[0048] Tx: optical transmitter;

[0049] τ 0 : The delay between the pulse signal generated by the transmitting end and the transmission of the pulse signal to the test end;

[0050] δτ: adjustable d...

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Abstract

A type of light Signal-to-Noise detecting device in photoamplifier transmission link band includes pulse light signal generator, light splitter, photoelectric transducer, trigger, and spectrometer; the pulse light signal generator is meted into the system which is to be detected before the photoamplifier; the light splitter is connected with the light port of the light transmission system, the light splitter possesses two output, one is connected with the spectrometer, another is connected with the spectrometer via the photoelectric transducer and trigger. The invention also introduces the corresponding detecting method. Adopting the generation measure of trigger signal in test terminal, the invention possesses advancements of measuring light Signal-to-Noise precisely as common spectrometer, and effect that the light Signal-to-Noise of light transmission system can be detected by band-in method by common spectrometer can be achieved.

Description

technical field [0001] The invention relates to a testing device for the in-band optical signal-to-noise ratio of a transmission link with an optical amplifier, in particular to optical transmission equipment in the field of optical communication. Background technique [0002] The general method of optical signal-to-noise ratio (OSNR) test of optical transmission system is to use interpolation method, and the average value of the noise deviated from the center frequency of the signal is regarded as the noise at the signal frequency, and the ratio of the signal power to the noise power is the optical signal-to-noise ratio . This approach is generally referred to as the "out-of-band testing approach". [0003] There are some problems in the out-of-band test method. For example, in the dense wavelength division multiplexing (DWDM) optical transmission system, when the optical add-drop multiplexer (OADM) is included, due to the filtering effect of the optical filter, the left a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/08H04J14/02H04B10/071H04B10/079
Inventor 张红宇王加莹苏婕
Owner ZTE CORP
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