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Measurements of polarization-dependent loss (pdl) and degree of polarization (dop) using optical polarization controllers and method thereof

A technology of polarization controller and light polarization, applied in the field of optical measurement

Active Publication Date: 2006-08-02
月神创新股份有限公司
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Problems solved by technology

Thus measuring the maximum spread factor and the minimum spread factor

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  • Measurements of polarization-dependent loss (pdl) and degree of polarization (dop) using optical polarization controllers and method thereof
  • Measurements of polarization-dependent loss (pdl) and degree of polarization (dop) using optical polarization controllers and method thereof
  • Measurements of polarization-dependent loss (pdl) and degree of polarization (dop) using optical polarization controllers and method thereof

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Embodiment Construction

[0017] The above content and other control methods will be further described in detail below in conjunction with the accompanying drawings.

[0018] Polarization Dependent Loss (PDL) is the full range insertion loss after transmission through an optical medium (a device or a material) due to changing its polarization state, from the original SOP (initial state) into the optical medium. Therefore, PDL can be expressed as:

[0019] PDL = 10 log 10 (Pmax / Pmin)

[0020] Here Pmax and Pmin are the maximum and minimum values ​​representing the optical transmission power in the device and medium, for all possible input polarization phenomena.

[0021] figure 1 Illustrates a typical device used to measure PDL in an optical medium or device under test. The SOP changes in the input light, through all possible SOPS; the optical transmission power is measured by obtaining the maximum and minimum transmission powers. Based on the measured Pmax and Pmin, PDL can be calculated by Eq.

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Abstract

Devices and techniques that use a polarization controller and a feedback control to the polarization controller to systematically control the polarization of light output from the polarization controller in measuring the polarization dependent loss (PDL) of an optical device or material that receives the light from the polarization controller or the degree of polarization (DOP) of a light beam directed into the polarization controller.

Description

[0001] The present invention is based on U.S. patent application titled: "Measurement of Polarization-Dependent Loss (PDL) and Degree of Polarization (DOP) Using Optical Polarization Controller", application number 60 / 632,579, filed on December 1, 2004 Invention application as priority. technical field [0002] The invention belongs to the technical field of optical measurement, and in particular relates to a device and a method for measuring polarization-related loss and polarization degree by using an optical polarization controller. Background technique [0003] Light polarization parameters have a significant effect on a beam or optical signal. Polarization-dependent losses (such as PDL and PMD) can have effects in optical fibers and other equipment, affecting the operation of optical devices or systems. This device can reasonably measure and reflect the SOP, PDL and DOP in the optical signal. Contents of the invention [0004] The present invention demonstrates how ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J4/00G01N21/21
CPCG01M11/337
Inventor 姚晓天
Owner 月神创新股份有限公司
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