2008

Efficient Coupler for a Bessel Beam Dispersive Element

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

Managing Risk in Medical Connectors
Sponsored by Fischer Connectors
White Paper: MIL-STD-1553 IP Cores - An Emerging Technology
Sponsored by Sealevel
IEC 61131-3 Now in Motion
Sponsored by Trio Motion
Tubing & Hose Buying Tips
Sponsored by Newage Industries
Software Defined Radio Handbook
Sponsored by Pentek
Thinking Outside of the Box: Optimizing System Design With Embedded Expertise
Sponsored by Curtiss Wright

White Papers Sponsored By: