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Test method and system for optical modulation amplitude value in receiving sensitivity measurement

A technology of optical modulation amplitude and receiving sensitivity, which is applied in the field of optical communication, can solve problems such as complex calculations, and achieve the effect of simple test steps and guaranteed test accuracy

Active Publication Date: 2017-07-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above method solves the test of the receiving sensitivity optical modulation amplitude value of the non-return-to-zero signal, the calculation is slightly complicated and involves the measurement of the intermediate parameter extinction ratio, and if it involves high-order modulation, such as four-level pulse amplitude modulation, the calculation formula need to redesign

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  • Test method and system for optical modulation amplitude value in receiving sensitivity measurement
  • Test method and system for optical modulation amplitude value in receiving sensitivity measurement
  • Test method and system for optical modulation amplitude value in receiving sensitivity measurement

Examples

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Embodiment 1

[0042] Embodiment 1. A test method for optical modulation amplitude value in receiving sensitivity measurement, such as figure 1 As shown, including steps S110-S130:

[0043] S110. Measure the receiving sensitivity of the optical module to be tested, and record the receiving sensitivity as the first power;

[0044] S120. After adjusting the input optical power input to the receiving end of the optical module to be tested to within a predetermined power range, record the input optical power as a second power, and measure a second optical modulation amplitude;

[0045] S130. Divide the second optical modulation amplitude by the second power, and multiply by the first power to obtain the first optical modulation amplitude in receiving sensitivity measurement.

[0046] In this embodiment, the sequence of S120 and S110 is not limited. Since the receiving sensitivity needs to be measured in S110, and the optical modulation amplitude needs to be measured in S120, the input optical ...

Embodiment 2

[0096] Embodiment 2. A test system for optical modulation amplitude value in receiving sensitivity measurement, such as image 3 As shown, it includes: a reference transmitter 31, an adjustable attenuator 32 arranged between the sending end of the reference transmitter and the receiving end of the optical module 30 to be tested, an optical power meter 33, an optical oscilloscope 34, and a control device 35;

[0097] The control device 35 is used to adjust the adjustable attenuator 32 to measure the receiving sensitivity of the optical module 30 to be tested, and record the receiving sensitivity measured by the optical power meter 33 as the first power; Adjustable attenuator 32, after the input optical power input to the receiving end of the optical module 30 to be tested falls within a predetermined power range, record the input optical power measured by the optical power meter 33 as the second power, and from the The optical oscilloscope 34 obtains the second optical modulati...

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Abstract

The invention discloses a test method and system for an optical modulation amplitude value in receiving sensitivity measurement. The test method comprises the steps of measuring receiving sensitivity of a to-be-tested optical module and recording the receiving sensitivity as first power; after input optical power input into a receiving end of the to-be-tested optical module is adjusted to a preset power interval, recording the input optical power as second power and measuring second optical modulation amplitude; and dividing the second optical modulation amplitude by the second power and then multiplying a result by the first power to obtain first optical modulation amplitude in the receiving sensitivity measurement. The invention provides an improved test scheme for the optical modulation amplitude value in the receiving sensitivity measurement.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a method and system for testing optical modulation amplitude values ​​in receiving sensitivity measurement. Background technique [0002] When evaluating the signal transmission capability of an Ethernet optical interface, it is often necessary to consider the test of receiving sensitivity parameters, especially the evaluation based on the optical modulation amplitude. For non-return-to-zero signals, the optical modulation amplitude is defined as the power difference between the high-level signal and the low-level signal. However, when measuring the input optical signal with an oscilloscope, the test accuracy is often affected by the input optical power. The smaller the input optical power, the greater the test error. When measuring the receiving sensitivity, the optical modulation amplitude cannot be directly obtained. The conventional method is through Measure its extincti...

Claims

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Application Information

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IPC IPC(8): H04B10/079
CPCH04B10/079H04B10/0799
Inventor 沈百林武成宾
Owner ZTE CORP