Characterization of fiber Bragg gratings written using a remote writing technique and a coherent CW UV source

Christopher William Smelser; Dan Grobnic; Ping Lu; Stephen James Mihailov; Robert Bruce Walker; Xiaoli Dai; Huiming Ding

doi:10.1117/12.567412

20 December 2004 Characterization of fiber Bragg gratings written using a remote writing technique and a coherent CW UV source

Christopher William Smelser, Dan Grobnic, Ping Lu, Stephen James Mihailov, Robert Bruce Walker, Xiaoli Dai, Huiming Ding

Author Affiliations +

Proceedings Volume 5577, Photonics North 2004: Optical Components and Devices; (2004) https://doi.org/10.1117/12.567412
Event: Photonics North, 2004, Ottawa, Ontario, Canada

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.

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Christopher William Smelser, Dan Grobnic, Ping Lu, Stephen James Mihailov, Robert Bruce Walker, Xiaoli Dai, and Huiming Ding "Characterization of fiber Bragg gratings written using a remote writing technique and a coherent CW UV source", Proc. SPIE 5577, Photonics North 2004: Optical Components and Devices, (20 December 2004); https://doi.org/10.1117/12.567412

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KEYWORDS

Fiber Bragg gratings

Ultrafast phenomena

Phase shift keying

Ultraviolet sources

Femtosecond phenomena

Modulation

Excimers

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