2008

A document discusses overcoming efficient optical coupling to high orbital momentum modes by slightly bending the taper dispersive element. This little shape distortion is not enough to scramble the modes, but it allows the use of regular, free-beam prism coupling, fiber coupling, or planar fiber on-chip coupling with, ultimately, 100 percent efficiency.

The Bessel-beam wave- guide is bent near the contact with the coupler, or a curved coupler is used. In this case, every Bessel-beam mode can be successfully coupled to a collimated Gaussian beam. Recently developed Bessel-beam waveguides allow long optical delay and very high dispersion. Delay values may vary from nanoseconds to microseconds, and dispersion promises to be at 100 μs/nm. Optical setup consisted of a red laser, an anamorphic prism pair, two prism couplers, and a bent, single-mode fiber attached to prisms. The coupling rate increased substantially and corresponded to the value determined by the anamorphic prism pair.

This work was done by Anatoliy Savchenkov, Vladimir Iltchenko, Andrey Matsko, Thanh Le, Nan Yu, and Lute Maleki of Caltech for NASA’s Jet Propulsion Laboratory.
NPO-45440

This Brief includes a Technical Support Package (TSP).

Efficient Coupler for a Bessel Beam Dispersive Element (reference NPO-45440) is currently available for download from the TSP library.

Please Login at the top of the page to download.

White Papers

Antenna Basics
Sponsored by Rohde and Schwarz AD
Case Study: High Tech – Virtualized Computing Platform
Sponsored by Arena Solutions
Putting FPGAs to Work in Software Radio Systems
Sponsored by Pentek
Introduction to Machine Vision
Sponsored by Cognex
Algorithms for Change Point Analysis
Sponsored by Numerical Algorithms Group
Computer Aided Design of Suspension Mechanisms
Sponsored by Dr. C H Suh

White Papers Sponsored By:

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.