Dual-channel optical performance bi-directional multi-alignment-angle automatic testing device for Y waveguide

Abstract

The invention belongs to the technical field of optical device measurement, and particularly relates to a dual-channel optical performance bi-directional multi-alignment-angle automatic testing device for a Y waveguide. The automatic testing device comprises a high-polarization-stability wide spectrum light source, an optical signal axis changing mechanism, an optical signal channel direction switching mechanism, the integrated waveguide modulator to be tested namely the Y waveguide, an optical path demodulating device and a polarization crosstalk detecting and recording device. The optical signal axis changing mechanism is provided with a first input end pigtail, a second input end pigtail, a third output end pigtail and a fourth output end pigtail, and the first input end pigtail, the second input end pigtail, the third output end pigtail and the fourth output end pigtail are connected with the first input ends and the second input ends of the high-polarization-stability wide spectrum light source, the optical path demodulating device and the optical signal channel direction switching mechanism respectively. The axis changing, direction changing and channel changing functions of the device are controlled through a computer, and the integrated waveguide modulator to be tested can be tested in a multi-alignment-angle, bi-directional and dual-channel mode. Testing results are more detailed, comprehensive and accurate.

Description

technical field [0001] The design of the invention belongs to the technical field of optical device measurement, and in particular relates to a double-channel optical property bidirectional multi-pair axis angle automatic testing device of a Y waveguide. Background technique [0002] Multifunctional integrated optical devices are commonly known as "Y waveguides", generally using lithium niobate materials as the substrate, which highly integrates single-mode optical waveguides, optical beam splitters, optical modulators and optical polarizers, forming an interference fiber optic gyroscope The core components of (FOG) and fiber optic current transformer determine the measurement accuracy, stability, volume and cost of the fiber optic sensing system. [0003] There are several parameters that determine the performance of the Y-waveguide device: the extinction ratio of the waveguide chip, the crosstalk of the waveguide pigtail, the optical path difference of the output channel, ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned test methods and devices can only test the characteristics of a single channel of the Y waveguide. When testing another channel, it is necessary to reconnect the device.

The consistency of such tests cannot be well guaranteed

And in the process of testing, if it is necessary to test the optical characteristics of multi-axis angles, it is necessary to manually rotate the axis angles, which increases the test time and introduces more uncertain factors caused by human operation. impact, reducing the test accuracy and reliability

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