Techniques for using chirped fields to reconfigure a medium...

Details Techniques for using chirped fields to reconfigure a medium... Techniques for using chirped fields to reconfigure a medium...

2007-12-11

2007-12-11

Sanghavi, Hemang (Department: 2874)

Optical: systems and elements

Optical frequency converter

C365S106000, C365S118000, C359S237000, C359S245000, C359S252000, C359S262000

Reexamination Certificate

active

11487571

ABSTRACT:
Techniques for reconfiguring spectral features stored in a medium based on a two-state atomic system with transition dipole moment μ includes causing a chirp to pass into the medium. The chirp includes a monochromatic frequency that varies in time by a chirp rate κ over a frequency band BRduring a time interval TR. The amplitude ARof the chirp is constant over BRand equal toin-line-formulae description="In-line Formulae" end="lead"?AR=(hbar/μπ)√{square root over ((κ ln [2/ε]))},in-line-formulae description="In-line Formulae" end="tail"?The term hbar is reduced Plank's constant, ln is a natural logarithm function, and π is a ratio of a circumference of a circle to a diameter of the circle. For ε<<1, the atomic-state populations in the two states are inverted. For ε=1, prior atomic-state populations are erased, with final populations equal in the two states, regardless of populations before erasure.

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