Light-driven phase shifter

Details Light-driven phase shifter Light-driven phase shifter

G - Physics

02

F

345/11

G02F 1/19 (2006.01) G02F 1/01 (2006.01) G02F 1/35 (2006.01)

Patent

CA 1285640

LIGHT-DRIVEN PHASE SHIFTER ABSTRACT OF THE DISCLOSURE A light-driven phase shifter is provided for modulating a transmission light beam. A gaseous medium such as argon is provided with electron energy states excited to populate a metastable state. A tunable dye laser is selected with a wavelength effective to deplete the metastable electron state and may be intensity modulated. The dye laser is directed through the gaseous medium to define a first optical path having an index of refraction determined by the gaseous medium having a depleted metastable electron state. A transmission laser beam is also directed through the gaseous to define a second optical path at least partially coincident with the first optical path. The intensity of the dye laser beam may then be varied to phase modulate the transmission laser beam.

546625

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