Journal article
Single-mode sapphire fiber Bragg grating
- Abstract:
- Sapphire optical fiber has the ability to withstand ultrahigh temperatures and high radiation, but it is multimoded which prevents its use in many sensing applications. Problematically, Bragg gratings in such fiber exhibit multiple reflection peaks with a fluctuating power distribution. In this work, we write single-mode waveguides with Bragg gratings in sapphire using a novel multi-layer depressed cladding design in the 1550 nm telecommunications waveband. The Bragg gratings have a narrow bandwidth (<0.5 nm) and have survived annealing at 1000°C. The structures are inscribed with femtosecond laser direct writing, using adaptive beam shaping with a non-immersion objective. A single-mode sapphire fiber Bragg grating is created by writing a waveguide with a Bragg grating within a 425 µm diameter sapphire optical fiber, providing significant potential for accurate remote sensing in ultra-extreme environments.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Publisher copy:
- 10.1364/oe.446664
Authors
- Publisher:
- Optica Publishing Group
- Journal:
- Optics Express More from this journal
- Volume:
- 30
- Issue:
- 9
- Pages:
- 15482-15494
- Publication date:
- 2022-04-21
- Acceptance date:
- 2022-02-24
- DOI:
- EISSN:
-
1094-4087
- Language:
-
English
- Keywords:
- Pubs id:
-
1253602
- Local pid:
-
pubs:1253602
- Deposit date:
-
2022-05-02
Terms of use
- Copyright holder:
- Optica Publishing Group
- Copyright date:
- 2022
- Rights statement:
- © 2022. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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