UV Bragg grating inscription in germanium-doped photonic crystal fibers

Thomas Geernaert; Martin Becker; Pawel Mergo; Tomasz Nasilowski; Jan Wojcik; Waclaw Urbanczyk; Manfred Rothhardt; Christoph Chojetzki; Hartmut Bartelt; Francis Berghmans; Hugo Thienpont

doi:10.1117/12.855763

14 May 2010 UV Bragg grating inscription in germanium-doped photonic crystal fibers

Thomas Geernaert, Martin Becker, Pawel Mergo, Tomasz Nasilowski, Jan Wojcik, Waclaw Urbanczyk, Manfred Rothhardt, Christoph Chojetzki, Hartmut Bartelt, Francis Berghmans, Hugo Thienpont

Author Affiliations +

Proceedings Volume 7714, Photonic Crystal Fibers IV; 77140S (2010) https://doi.org/10.1117/12.855763
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

The design flexibility of photonic crystal fibers has accelerated the development of specialty optical fibers for a wide variety of applications. Optical fiber sensor applications for instance can benefit from this fiber technology. Fiber Bragg grating inscriptions in photonic crystal fibers have been reported with inscription setups that go from continuous-wave to femtosecond pulsed laser sources. However, the compatibility of the microstructures in these fibers with conventional ultraviolet inscription techniques was never before investigated in a broad range of (Germanium doped) fibers. We present UV laser induced dynamics of Bragg gratings growths in photonic crystal fibers with a hexagonal arrangement of 6 rings of airholes around a Germanium doped core region. The average refractive index increase and the refractive index modulation by the grating inscription process are compared for microstructures with several doping levels, airhole filling factors, airhole pitch distance and fiber orientation. We show how the parameters of the microstructure can influence the Bragg grating inscriptions. In addition we expand the range of fibers in which Bragg gratings, with reflection strengths that are useable for sensing purposes, can be inscribed to fibers with Germanium doping concentrations as low as 1.36 and 0.45 mol%.

Citation Download Citation

Thomas Geernaert, Martin Becker, Pawel Mergo, Tomasz Nasilowski, Jan Wojcik, Waclaw Urbanczyk, Manfred Rothhardt, Christoph Chojetzki, Hartmut Bartelt, Francis Berghmans, and Hugo Thienpont "UV Bragg grating inscription in germanium-doped photonic crystal fibers", Proc. SPIE 7714, Photonic Crystal Fibers IV, 77140S (14 May 2010); https://doi.org/10.1117/12.855763

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available