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Optical multistability in a silicon-core silica-cladding fiber.

Ivan A Temnykh¹, Neil F Baril, Zhiwen Liu

¹Department of Material Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA. iat107@psu.edu

|April 15, 2010

Summary

We developed a novel silicon-core optical fiber exhibiting all-optical bistability. This fiber shows potential for low-power optical switching applications in telecommunications.

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Area of Science:

Photonics
Materials Science
Optical Engineering

Background:

Silicon-core optical fibers offer unique thermo-optic properties.
Fabry-Perot resonators are crucial for optical switching.
All-optical bistability is a key phenomenon for optical signal processing.

Purpose of the Study:

To fabricate and characterize a novel silicon-core silica-cladding optical fiber.
To investigate its optical transmission properties at 1550 nm.
To demonstrate all-optical bistability and multistability.

Main Methods:

Fabrication using high pressure chemical fluid deposition.
Characterization of optical transmission at 1550 nm.
Observation of bistability using power and wavelength modulation.

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Main Results:

A silicon-core fiber with a 6.9 micrometer diameter was fabricated.
A thermal phase shift of 6.3 rad/K was observed.
All-optical bistability was achieved at a low threshold power of 15 mW.
Intensity transitions of 1.4 dB over <0.1 pm wavelength change were measured.
Experimental confirmation of tristability.

Conclusions:

The novel silicon-core fiber demonstrates efficient all-optical bistability.
The observed thermal phase shift is significant for optical applications.
This fiber is a promising candidate for low-power optical switching and signal processing.