Power Tapping Function in Near Infra-Red Region Based on 45° Tilted Fiber Gratings

Adedotun Adebayo, Zhijun Yan, Kaiming Zhou, Lin Zhang, Hongyan Fu, David Robinson

Arden Photonics Ltd., Solihull, UK.
Aston Institute of Photonics Technology, School of Engineering and Applied Science, Aston University, Birmingham, UK.
Department of Electronic Engineering, School of Information Science and Engineering, Xiamen University, Xiamen, China.

DOI: 10.4236/opj.2013.32026                

Abstract

We report an efficient power tapping device working in near infra-red (800 nm) wavelength region based on UV-in- scribed 45° tilted fiber grating (45°-TFG) structure. Five 45°-TFGs were UV-inscribed in hydrogenated PS750 fiber using a custom-designed phase mask with different grating lengths of 3 mm, 5 mm, 9 mm, 12 mm and 15 mm, showing polarization dependent losses (PDLs) of 1 dB, 3 dB, 7 dB, 10 dB and 13 dB, respectively. The power side-tapping efficiency is clearly depending on the grating strength. It has been identified that the power tapping efficiency increases with the grating strength and deceases along the grating length. The side-tapped power profile has also been examined in azimuthal direction, showing a near-Gaussian distribution. These experimental results clearly demonstrated that 45°- TFGs may be used as in-fiber power tapping devices for applications requiring in-line signal monitoring.

Keywords

Power Tapping; Tilted Fiber Grating; Polarization Dependent Loss; In-Fiber Polarizer

Conflicts of Interest

The authors declare no conflicts of interest.

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