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Device and method for improving polarization crosstalk measurement performance of optical device

A technology of polarization crosstalk and optical devices, which is applied in testing optical performance, etc.

Active Publication Date: 2014-12-03
HARBIN ENG UNIV
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Problems solved by technology

This method can improve the polarization crosstalk sensitivity of the all-fiber measurement system to -95dB, but maintain the dynamic range at 75dB

Method used

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  • Device and method for improving polarization crosstalk measurement performance of optical device
  • Device and method for improving polarization crosstalk measurement performance of optical device
  • Device and method for improving polarization crosstalk measurement performance of optical device

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Embodiment Construction

[0066] In order to clearly illustrate the method and device of the present invention for improving the measurement performance of distributed polarization crosstalk of optical devices, the present invention will be further described in conjunction with the examples and accompanying drawings, but the protection scope of the present invention should not be limited by this.

[0067] Distributed polarization crosstalk measurement scheme based on Mach-Zehnder optical path correlator, such as Figure 5 shown. The selection of main optoelectronic devices and their parameters are as follows:

[0068] (1) The central wavelength of the broadband light source 301 is 1550nm, the half-spectrum width is greater than 45nm, the fiber output power is greater than 2mW, and the extinction ratio is greater than 6dB;

[0069] (2) The working wavelength of the online fiber polarizer 311 is 1550nm, the extinction ratio is 30dB, the insertion loss is less than 1dB, the input end is a single-mode fib...

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Abstract

The invention provides a device and a method for improving polarization crosstalk measurement performance of an optical device. The device comprises a wide spectrum light source (301), a polarizer (311), a polarization device to be tested (632), an optical path correlator (640) and a polarization crosstalk detection and signal recording device (150), wherein the wide spectrum light source (301) is connected with the optical device to be tested (632) by the polarizer (311) and a first rotation connector (631) and then is connected with the optical path correlator (640) by a second rotation connector (633). By the device and the method, noise amplitude can be greatly suppressed, the sensitivity of polarization crosstalk measurement is improved, the dynamic range of polarization crosstalk measurement is expanded, and the device and the method are widely used for high-precision measurement and analysis on polarization performance of the optical device.

Description

technical field [0001] The invention relates to an optical fiber measuring device, and also relates to an optical fiber measuring method. In particular, it relates to a method and a device for improving the measurement performance of polarization crosstalk of an optical device. Background technique [0002] Polarization optical devices are an important part of high-precision optical measurement and sensing systems. At present, the performance testing and evaluation methods and devices of optical devices are backward, which seriously hinders the development of high-precision optical measurement and sensing systems. For example, the chip extinction ratio of lithium niobate integrated waveguide modulator (commonly known as Y waveguide), the core device of high-precision fiber optic gyroscope, has reached more than 80dB; The rate is around 50dB (according to the definition of energy, it is 10 5 ), the highest resolution is the Model 4810 polarization extinction ratio developed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 杨军苑勇贵彭峰苑立波
Owner HARBIN ENG UNIV
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