Fiber Draw Synthesis

Technology #14718

Questions about this technology? Ask a Technology Manager

Download Printable PDF

Image Gallery
Fig.1 Schematic drawings of structured preform drawn into fiber along with SEM micrographs of actual fiber and magnification of a single metal-semiconductor-metal deviceFig. 2 Characterization of fiber-integrated photodiode. (A) Current per length for distributed photodiode in the dark and under illumination from simulated AM1.5G source. (Inset) Shows bias polarity. (B) Inverse square of capacitance as a function of applied voltage reveals a junction built-in voltage of 0.8 V. (C) Responsivity as a function of wavelength.
Categories
Inventors
Professor John Joannopoulos
Research Laboratory of Electronics, MIT
External Link (www.rle.mit.edu)
Professor Yoel Fink
Research Laboratory of Electronics, MIT
External Link (www.rle.mit.edu)
Ofer Shapira
Research Laboratory of Electronics, MIT
External Link (www.rle.mit.edu)
Fabien Sorin
Research Laboratory of Electronics, MIT
External Link (www.rle.mit.edu)
Nicholas Orf
Research Laboratory of Electronics, MIT
External Link (www.rle.mit.edu)
Sylvain Danto
Research Laboratory of Electronics, MIT
External Link (www.rle.mit.edu)
Managed By
Jim Freedman
MIT Technology Licensing Officer - Chemicals, Instruments, Consumer Products
Patent Protection

Fiber draw synthesis

US Patent 8,663,522
Publications
Fiber draw synthesis
Proceedings of the National Academy of Sciences of the United States of America PNAS, Proceedings of the National Academy of Sciences, March 22, 2011 vol. 108 no. 12 4743-4747
Fiber draw synthesis
Optical Society of America, 14 November 2014

Applications

The applications of this invention are in fiber devices used in telecommunication, optical imaging, industrial monitoring, remote sensing and functional fabrics.

Problem Addressed

Traditional fiber-optic drawing involves a geometric scaling where the fiber materials and their relative position are both identical to those found in the fiber preform. To date, all thermally drawn fibers are limited to the preform composition and geometry. Therefore, there is a need for better fiber drawing methods with the ability to synthesize new compounds during the process.

Technology

This invention enables the synthesis of a high-melting temperature semiconductor in a low-temperature fiber drawing process.  During this process, reagents in the solid state are arranged in proximate domains within a fiber preform. The preform is liquidized at elevated temperatures and drawn into fiber, reducing the lateral dimensions and bringing the domains into intimate contact to enable chemical reaction. The synthesized compound semiconductor becomes the basis for an electronic hetero-structure diode of arbitrary length in the fiber. The ability to synthesize materials within fibers while precisely controlling their geometry and electrical connectivity at sub-micron scales presents new opportunities for increasing the complexity and functionality of fiber structures.

Advantages

  • This process substantially expands the set of materials that can be incorporated into fibers.
  • Improved fiber functionality and performance¬†