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Measuring spatial correlations of photon pairs by automated raster scanning with spatial light modulators.

Paul EC, Hor-Meyll M, Ribeiro PH, Walborn SP - Sci Rep (2014)

Bottom Line: We demonstrate the use of a phase-only spatial light modulator for the measurement of transverse spatial distributions of coincidence counts between twin photon beams, in a fully automated fashion.This is accomplished by means of the polarization dependence of the modulator, which allows the conversion of a phase pattern into an amplitude pattern.We also present a correction procedure, that accounts for unwanted coincidence counts due to polarization decoherence effects.

View Article: PubMed Central - PubMed

Affiliation: Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21941-972, Brazil.

ABSTRACT
We demonstrate the use of a phase-only spatial light modulator for the measurement of transverse spatial distributions of coincidence counts between twin photon beams, in a fully automated fashion. This is accomplished by means of the polarization dependence of the modulator, which allows the conversion of a phase pattern into an amplitude pattern. We also present a correction procedure, that accounts for unwanted coincidence counts due to polarization decoherence effects.

No MeSH data available.


Related in: MedlinePlus

Marginal distributions for the anti-diagonal coordinate xs − xi.Red circles correspond to raw data, giving distribution N−, and blue squares correspond to corrected data, giving distribution C−.
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f8: Marginal distributions for the anti-diagonal coordinate xs − xi.Red circles correspond to raw data, giving distribution N−, and blue squares correspond to corrected data, giving distribution C−.

Mentions: By summing the coincidence distributions (N or C) over the diagonal variable xs + xi, we have the marginal coincidence distributions N− and C− for the anti-diagonal variable xs − xi, as shown in Fig. 8. Red circles correspond to raw data N− and blue squares to corrected data C−. We can see that the corrected data more closely approximates the distribution C(xs − xi) shown in Fig. 4b).


Measuring spatial correlations of photon pairs by automated raster scanning with spatial light modulators.

Paul EC, Hor-Meyll M, Ribeiro PH, Walborn SP - Sci Rep (2014)

Marginal distributions for the anti-diagonal coordinate xs − xi.Red circles correspond to raw data, giving distribution N−, and blue squares correspond to corrected data, giving distribution C−.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4061558&req=5

f8: Marginal distributions for the anti-diagonal coordinate xs − xi.Red circles correspond to raw data, giving distribution N−, and blue squares correspond to corrected data, giving distribution C−.
Mentions: By summing the coincidence distributions (N or C) over the diagonal variable xs + xi, we have the marginal coincidence distributions N− and C− for the anti-diagonal variable xs − xi, as shown in Fig. 8. Red circles correspond to raw data N− and blue squares to corrected data C−. We can see that the corrected data more closely approximates the distribution C(xs − xi) shown in Fig. 4b).

Bottom Line: We demonstrate the use of a phase-only spatial light modulator for the measurement of transverse spatial distributions of coincidence counts between twin photon beams, in a fully automated fashion.This is accomplished by means of the polarization dependence of the modulator, which allows the conversion of a phase pattern into an amplitude pattern.We also present a correction procedure, that accounts for unwanted coincidence counts due to polarization decoherence effects.

View Article: PubMed Central - PubMed

Affiliation: Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21941-972, Brazil.

ABSTRACT
We demonstrate the use of a phase-only spatial light modulator for the measurement of transverse spatial distributions of coincidence counts between twin photon beams, in a fully automated fashion. This is accomplished by means of the polarization dependence of the modulator, which allows the conversion of a phase pattern into an amplitude pattern. We also present a correction procedure, that accounts for unwanted coincidence counts due to polarization decoherence effects.

No MeSH data available.


Related in: MedlinePlus