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Updated: Jun 8, 2026
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Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Summary
This study introduces a novel binary reflection grating achieving 77% diffraction efficiency in the +1st order. The grating exhibits unique polarization properties, directing TE-polarized light to the +1st order and TM-polarized light to the 0th order.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Diffractive Optics
Background:
- Conventional blazed gratings are essential optical components.
- Achieving high diffraction efficiency and specific polarization control remains a challenge.
- Miniaturized optical elements offer potential for advanced applications.
Purpose of the Study:
- To design and demonstrate a high-efficiency binary reflection grating.
- To investigate the polarization-dependent diffraction properties of the grating.
- To validate experimental results with rigorous diffraction theory.
Main Methods:
- Fabrication of a binary grating with feature sizes comparable to the incident light's wavelength.
- Utilizing a minilattice structure to imitate a blazed grating profile.
- Experimental measurement of diffraction efficiency for different orders and polarizations.
Main Results:
- Achieved a measured intensity of 77% for the +1st diffracted order.
- Demonstrated distinct polarization behavior: TE-polarized light diffracted into the +1st order, TM-polarized light into the 0th order.
- Experimental measurements showed reasonable agreement with rigorous diffraction theory.
Conclusions:
- The developed binary reflection grating offers high diffraction efficiency.
- The grating exhibits unique and useful polarization selectivity.
- This binary grating design serves as a viable alternative to conventional blazed gratings.
