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Manufacturing Of Robust Natural Fiber Preforms Utilizing Bacterial Cellulose as Binder

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Chiral fiber gratings.

Victor I Kopp¹, Victor M Churikov, Jonathan Singer

¹Chiral Photonics, Inc., Clifton, NJ 07012, USA. vickopp@chiralphotonics.com

Science (New York, N.Y.)

|July 3, 2004

Summary

Researchers created chiral gratings in optical fibers by twisting them. These novel gratings exhibit polarization-selective transmission, enabling applications in sharp or broad optical filters.

Area of Science:

Optics and Photonics
Materials Science

Background:

Chiral structures exhibit unique optical properties.
Optical fibers are versatile platforms for photonic devices.

Purpose of the Study:

To fabricate and characterize chiral gratings in optical fibers.
To investigate the polarization-selective transmission properties of these gratings.

Main Methods:

Producing chiral gratings by twisting glass optical fibers with noncircular cores through a miniature oven.
Observing polarization-selective transmission in fibers with pitches of tens of micrometers.

Main Results:

Differentiated two modes of optical interaction in chiral gratings.
Observed transmission dips in chiral long-period gratings due to scattering into cladding modes.

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Observed a broad scattering band in chiral intermediate-period gratings.

Conclusions:

Chiral gratings in optical fibers demonstrate polarization-selective transmission.
These gratings can be engineered to function as sharp or broad polarization-selective filters.