Polarizer straight waveguide tail fiber polarization crosstalk test system

Abstract

The invention discloses a polarizer straight waveguide tail fiber polarization crosstalk test system. The system comprises a light source, an optical splitter, a polarizer and an acquisition device, wherein the light source is connected with the input end of a branching unit through a polarization maintaining optical fiber, the branching unit is provided with a monitoring port and one or more testports, and the polarization maintaining optical fiber is connected with the acquisition device; the monitoring port is connected with a monitoring input end of the acquisition device through a polarization maintaining optical fiber, each test port is connected with an optical path input end of the polarizer through a polarization maintaining optical fiber, and each optical path output end of thepolarizer is connected with an input end of a to-be-tested device through a polarization maintaining optical fiber; an output end of each to-be-tested device is connected with an test input end of theacquisition device. According to the system, the lithium niobate array straight waveguide working in a single polarization manner is used as the polarizer, problems of low test precision, low efficiency and high cost are broken through, and the multichannel acquisition instrument is adopted, so the requirement of simultaneous acquisition of multichannel tail fiber polarization crosstalk and insertion loss can be met.

Description

Technical field [0001] The present invention relates to the field of fiber, in particular, a polarizing string test system of a repository straight wave guide tail fiber. Background technique [0002] In the fiber optic current transformer, the photoelectric properties of the lithium niobate pathway phase modulator of the key device have a large effect on the performance of the entire sensor. The titanium diffuser lithium-tone waveguide phase modulator has two polarization characteristics, which can simultaneously transmit transverse electric, TEs, and the transverse magnetic, TM) mold, and can also modulate the phase of these two modes This feature is favored in the field of fiber sensing, especially fiber optic current sensors. Such as figure 1 As shown, Super-Luminescent Diodes (SLD) Light Source 1 ', Light Receiving Components 2', Pre-Plant 3 ', A / D Converter 4', Signal Processors 5 ', D / A Converter 6 ', The circulator 7', the bidder 8 ', the direct waveguide phase modul...

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to solve the technical problems of the existing waveguide test method, such as poor stability, cumbersome operation, large loss of polarization control components, high cost, and low test efficiency, which are not conducive to the realization of batch high-efficiency test requirements, and provide a starting Polarization Crosstalk Test System for Straight Waveguide Pigtail Fiber with Polarizer

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