Semi-automatic measurement and control device for on-line preparation and writing-in device of fiber grating array

Abstract

The invention discloses a semi-automatic measurement and control device for an on-line preparation and writing-in device of a fiber grating array. The semi-automatic measurement and control device comprises a centralized control system, a lens adjustment control system, a grating scale platform monitoring system and a phase mask plate assembly electronic control system, wherein the lens adjustment control system, the grating scale platform monitoring system and the phase mask plate assembly electronic control system are connected with the centralized control system. The centralized control system controls a plurality of bearing sliding blocks and lens electric modulation modules arranged on the sliding blocks to realize two-dimensional-direction automatic control of the lens. The grating scale platform monitoring system is used for realizing feedback of position information in two-dimensional direction adjustment of the lens. The phase mask plate assembly electronic control system includes a mask adjustment sliding block and two ranging probes that are parallel to each other and are aligned at a bare fiber; a plurality of mask plates are arranged on the mask adjustment sliding block; and the mask plates can be replaced flexibly by moving the mask adjustment sliding block in parallel. According to the invention, the flexibility and accuracy of the system adjustment are ensured; and the long-term stability of the optical path is guaranteed and thus a fiber grating with high reflectivity and spectral shape consistency is obtained.

Description

technical field [0001] The invention relates to the field of optical fiber grating preparation, in particular to a device and method for semi-automatically controlling and adjusting a writing device and monitoring the adjustment result online when an optical fiber grating array is prepared online. Background technique [0002] With the increasing maturity of fiber optic sensing technology, in order to meet the real-time monitoring requirements of dense and networked multi-point and multi-parameter in actual engineering, fiber grating sensors have developed rapidly in the direction of large capacity, large scale and high performance in recent years. Among them, based on the fiber drawing tower, the grating array obtained by writing the fiber grating while drawing the fiber has advantages such as no solder joints, flexible process, good consistency, and high mechanical strength. alternative status. [0003] The quality of each grating prepared online by the fiber grating arra...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a semi-automatic control and monitoring device for the on-line preparation and writing device of the fiber grating array in view of the defects of the time-consuming and labor-intensive manual adjustment device in the prior art. Array production efficiency, to further ensure the quality of the grating, to obtain a fiber grating with high reflectivity and spectral shape consistency

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