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Laser threshold current testing method and device thereof

A threshold current and test method technology, applied in the field of optical fiber communication, can solve problems such as laser device nonlinearity, threshold current test error, noise interference, etc., achieve the effect of reducing requirements, high practical value, improving test efficiency and yield rate

Inactive Publication Date: 2013-11-27
CHENGDU HUAZHENGYUAN SCI & TECH
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Problems solved by technology

[0003] The object of the present invention is to provide a laser threshold current testing method and device for the deficiencies of the prior art above, which solves the problem of the threshold current caused by the interference of the test environment noise, the nonlinearity of the laser device, and the performance of the test device itself in the laser threshold current test. Current test error problem; and give the correct fixed laser threshold current

Method used

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  • Laser threshold current testing method and device thereof
  • Laser threshold current testing method and device thereof
  • Laser threshold current testing method and device thereof

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with examples, but they are not further limitations to the present invention.

[0042] figure 1 Schematically shows the overall flow chart of the laser threshold current testing method; including the following steps:

[0043] In step S1, the laser power and current data are received; the laser power and current data are obtained by using an ammeter and an optical power meter to test a semiconductor laser in a constant temperature (25°C) environment;

[0044] In step S2, the PI fitting curve is obtained according to the received laser power and current data; there are many ways to obtain the PI fitting curve, which can be obtained by Lorentz fitting, or by Gaussian fitting and least square method Fitting, Lagrange interpolation method, Newton iteration method, interval dichotomy and other fitting methods are obtained;

[0045] For example, Table 1 gives current and laser optical power data.

[0046...

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Abstract

The invention discloses a laser threshold current testing method and also discloses a laser threshold current testing device. According to the laser threshold current testing method and the laser threshold current testing device provided by the invention, through a method of setting threshold comparison, a threshold current testing error problem caused by testing environment noise interference, laser device nonlinearity and testing equipment performance in a laser threshold current testing is solved, the correct laser threshold current can be determined, thus the testing efficiency and the good product rate are greatly improved, the requirements of the testing environment and testing equipment are reduced, and the method and the device have a very high practical value.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to a laser threshold current testing method and device. Background technique [0002] The currently used laser threshold current testing methods, including the straight line fitting test algorithm, the two-stage straight line fitting test algorithm and the second derivation test algorithm, cannot avoid the interference of the test environment noise, the nonlinearity of the laser device and the test device itself. The laser threshold current test error caused by the performance of the laser can not determine the correct laser threshold current. Contents of the invention [0003] The purpose of the present invention is to provide a laser threshold current testing method and device for the deficiencies of the prior art above, which solves the problem of the threshold current caused by the interference of the test environment noise, the nonlinearity of the laser devi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 黄强
Owner CHENGDU HUAZHENGYUAN SCI & TECH
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