Special purpose modes in photonic band gap fibers
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsJames Spencer, Robert Noble, Sara Campbell
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Abstract
Photonic band gap fibers are described having one or more defects suitable for the acceleration of electrons or other charged particles. Methods and devices are described for exciting special purpose modes in the defects including laser coupling schemes as well as various fiber designs and components for facilitating excitation of desired modes. Results are also presented showing effects on modes due to modes in other defects within the fiber and due to the proximity of defects to the fiber edge. Techniques and devices are described for controlling electrons within the defect(s). Various applications for electrons or other energetic charged particles produced by such photonic band gap fibers are also described.
Claims7
A charged particle accelerator comprising:
- a photonic band gap fiber having one or more defects therein capable of transmitting charged particles axially therealong, a plurality of capillaries disposed around said one or more defects, one or wherein at least one of said one or more defects is capable of supporting an accelerating TM01-like mode, and one or more couplers for depositing energy into said accelerating TM01-like mode from lasers external to said photonic band gap fiber.
A photonic band gap fiber comprising one or more defects and a plurality of capillaries disposed around said one or more defects, wherein said photonic band gap fiber is capable of supporting one or more electromagnetic modes propagating along at least one of said one or more defects including a preferred mode, wherein said plurality of capillaries are disposed around said one or more defects in such manner so peak values for the transverse and longitudinal fields of said preferred mode occur at one or more locations resistant to breakdown, thereby increasing the power said photonic band gap fiber is capable of carrying.
Dependencies are inferred from the claim text.