The improved defects detection method of optical fiber winding

As the optical power variation is relatively small before and after the Pt/WO3film was exposed to hydrogen gas, traditional detective method to measure directly the variation of optical power in the fiber core is susceptible to interference. Therefore a new detection method, which is able to improve the relative variation for nearly 9 times by detecting the variation of optical power in the evanescent field, was proposed through mathematical analysis and simulations. The fundamental structure and working principle of step-index single mode optical fiber sensor were introduced.

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The Application of the Tension Online Detection and Control Technology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.503-504.171 ◽

2012 ◽

Vol 503-504 ◽

pp. 171-173

Author(s):

Xian Fang Wang ◽

Xue Qin Ren ◽

Wen Ya Li

Keyword(s):

Optical Fiber ◽

Production Process ◽

New Technology ◽

Tension Control ◽

Control Technology ◽

Practical Application ◽

Online Detection ◽

Fancy Yarns ◽

Fiber Winding ◽

And Control

The main contents of this article are the practical application of a new technology about the tension online detection and control, including the tension control in the production process and the winding process. For example, the optical fiber winding, the winding of roving, the winding of loose cone frame, special fancy yarns winding and so on. The new function is so strong that can be used in many aspects, which can meet the special production requirements and improve the product quality.

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Failure Detection Method for GaN-Based Dosimetric Systems

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.644.78 ◽

2015 ◽

Vol 644 ◽

pp. 78-82 ◽

Cited By ~ 1

Author(s):

Pierrick Guiral ◽

Jean Marc Galvan ◽

Patrick Pittet ◽

Ruo Xi Wang ◽

Guo Neng Lu ◽

...

Keyword(s):

Spectral Analysis ◽

Optical Fiber ◽

Detection Method ◽

Failure Detection ◽

Normal Operation ◽

Transmission Ratio ◽

Fiber Probe ◽

Optical Fiber Probe ◽

Uv Excitation ◽

Fiber Connection

We propose a failure detection method for GaN-based dosimetric systems, which basically consist of a GaN-incorporated optical fiber probe coupled to a photodetection module. The method consists in introducing UV excitation with a 285nm LED, and detecting the photoluminescence (PL) of the GaN transducer centered at 380nm. Spectral analysis of the detected signal allows verification of normal operation and identification of failure cases, due to problems of GaN-fiber coupling and poor fiber connection between probe and photodetection module. The proposed method is implemented and experimentally tested, including the use of a 660nm LED to illuminate the probe to verify the transmission ratio between probe and photodetection module. The validity of this method has been verified.

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