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Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Surface corrugation Bragg gratings on optical fiber tapers created via plasma etch postprocessing
W Ding1, S R Andrews, S A Maier
1Department of Physics, University of Bath, Bath BA2 7AY, UK. pypwd@bath.ac.uk
Optics Letters
|September 4, 2007
Summary
We developed a novel reflection-based fiber filter using plasma etching on a tapered fiber with a Bragg grating. This fiber filter effectively controls spectral response by adjusting taper diameter, offering precise optical filtering capabilities.
Area of Science:
- Photonics and Optical Engineering
- Fiber Optic Devices
- Nanofabrication
Background:
- Fiber Bragg gratings are crucial for optical filtering.
- Tapered fibers can manage higher-order modes in optical systems.
- Plasma etching offers precise surface modification for photonic devices.
Purpose of the Study:
- To introduce a novel reflection-based fiber filter.
- To demonstrate control over spectral response via taper diameter.
- To validate the filter's performance through theoretical and experimental analysis.
Main Methods:
- Fabrication of a surface corrugation Bragg grating on a tapered single-mode fiber using plasma etching.
- Utilizing adiabatic taper transitions to eliminate higher-order modes.
- Systematic variation of taper diameter to tune spectral response.
Main Results:
- The functional filter comprises the grating on the taper waist.
- Adiabatic taper transitions effectively suppressed unwanted higher-order modes.
- Experimental and theoretical reflection spectra showed good agreement, confirming design principles.
Conclusions:
- The developed fiber filter provides a viable method for precise optical filtering.
- Plasma-etched Bragg gratings on tapered fibers offer tunable spectral characteristics.
- This technology has potential applications in optical communication and sensing systems.
