Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Effects of the decorrelation on the coincidence detection with correlated photons in a parametric down-conversion

매개하향변환 과정에서 발생하는 광자쌍의 상관관계에 따른 동시계수 측정

  • 김헌오 (울산대학교 수학 및 물리기술학부) ;
  • 고정훈 (울산대학교 수학 및 물리기술학부) ;
  • 김태수 (울산대학교 수학 및 물리기술학부)
  • Published : 2001.12.01
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Abstract

The effect of decorrelation on the coincidence is investigated with correlated photons produced by parametric down-conversion process. The degree of correlation between photon pairs is adjusted by changing the polarization dependent transmissivities of thin glass plate\ulcorner in front of two detectors. It was found that the single counts of each detectors are proportional to the transmissivity and the coincidence is proportional to the product of transmissivities of the glasses in front of two detectors.

자발적인 매개하향변환과정에서 발생하는 광자쌍을 이용하여, 광학계내의 광손실에 따른 상관관계의 감소가 단일광자계수 와 두-광자 동시계수에 미치는 영향을 조사하였다. 두 검출기 앞에 얇은 유리판을 설치하고 유리판의 편광에 따른 투과율을 변화시켜 두 광자들간의 상관관계를 인위적으로 조절하였다. 상관관계의 정도에 따라 측정된 단일광자계수는 광자를 측정하는 검출기 앞에 놓인 유리판의 투과율에 비례하는 반면에, 두-광자 동시계수는 두 검출기 안에 놓인 두 유리판의 투과율의 곱에 비례하였다.

Keywords

References

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