Apparatus and method for performing sub-poissonian interference

Details Apparatus and method for performing sub-poissonian interference Apparatus and method for performing sub-poissonian interference

1995-05-08

1996-11-12

Gonzalez, Frank

Optics: measuring and testing

By particle light scattering

With photocell detection

G01B 902

Patent

active

055745571

ABSTRACT:
The invention demonstrates an apparatus and a method for performing sub-Poissonian interference measurements using an interferometer with a beam splitting element, a first photon input A, a second photon input B, a first photon output C, and a second photon output D. The apparatus has an optical path length adjustment for introducing an optical path length difference .theta. such that the interferometer operates as a phase-dependent beam-splitter. In this mode photons delivered to the first photon input A exit through the first photon output C and photons delivered to the second photon input B exit through the second photon output D. The apparatus also has a radiation generating device for producing photons in an intensity-squeezed state in which the amplitude a.sub.o.sup.2 of the photons ms substantially certain and the phase .phi. of the photons is substantially uncertain, and for delivering the photons to photon inputs A, B. The radiation generating device has an electrical current source, a resistive element connected in series with the electrical current source, and a photo-emitter element connected in series with the resistive element. The photo-emitter generates n of photons in the squeezed-intensity state during time period .tau..sub.p.

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