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Proceedings Paper

Characterization of fiber Bragg gratings written using a remote writing technique and a coherent CW UV source
Author(s): Christopher William Smelser; Dan Grobnic; Ping Lu; Stephen James Mihailov; Robert Bruce Walker; Xiaoli Dai; Huiming Ding
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Paper Abstract

Traditionally in the process of writing fiber Bragg gratings with a phase mask the fiber is placed near or in close contact with the mask. With low coherence excimer sources this is necessary because the fringe visibility is greatly reduced beyond 500 μm. As a result of these limitations there has been increased interest in understanding the interference phenomena associated with a phase mask. During the past year we studied the beam interference phenomena associated with ultrafast gratings. We observed that with these coherent sources it was possible to write gratings remotely (Phase Mask-Fiber distance of ≈1 cm). In addition to this we observed evidence of walk-off between mask orders that significantly affected the interference patterns. In this paper we demonstrate that a frequency doubled Argon-ion laser, being a coherent source, can be used to inscribe fiber Bragg gratings at large distances from the phase mask (> 15 mm). We will demonstrate that walk-off between mask orders will change the interference profile along the grating length. We show that the spectral profile correlates with the calculated interference pattern. Beam walk-off effects play a role in the inscription of any photonic device with a phase mask. This remote writing technique can be used to tailor the index modulation pattern in the fiber and could potentially be used to produce two beam interference gratings even in the presence of a significant zero order amplitude.

Paper Details

Date Published: 20 December 2004
PDF: 7 pages
Proc. SPIE 5577, Photonics North 2004: Optical Components and Devices, (20 December 2004); doi: 10.1117/12.567412
Show Author Affiliations
Christopher William Smelser, Communications Research Ctr. (Canada)
Dan Grobnic, Communications Research Ctr. (Canada)
Ping Lu, Communications Research Ctr. (Canada)
Stephen James Mihailov, Communications Research Ctr. (Canada)
Robert Bruce Walker, Communications Research Ctr. (Canada)
Xiaoli Dai, Communications Research Ctr. (Canada)
Huiming Ding, Communications Research Ctr. (Canada)

Published in SPIE Proceedings Vol. 5577:
Photonics North 2004: Optical Components and Devices
John C. Armitage; Simon Fafard; Roger A. Lessard; George A. Lampropoulos, Editor(s)

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