Measurement of the transverse spatial quantum state of light at the single-photon level

被引：44
|
作者：
Smith, BJ [1 ]
Killett, B
Raymer, MG
Walmsley, IA
Banaszek, K
机构：
[1] Univ Oregon, Oregon Ctr Opt, Eugene, OR 97403 USA
[2] Univ Oregon, Dept Phys, Eugene, OR 97403 USA
[3] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England
[4] Nicholas Copernicus Univ, Inst Phys, PL-87100 Torun, Poland
来源：
OPTICS LETTERS | 2005年 / 30卷 / 24期
关键词：
D O I：
10.1364/OL.30.003365
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present an experimental method to measure the transverse spatial quantum state of an optical field in coordinate space at the single-photon level. The continuous-variable measurements are made with a photon-counting, parity-inverting Sagnac interferometer based on all-reflecting optics. The technique provides a large numerical aperture without distorting the shape of the wavefront, does not introduce astigmatism, and allows for characterization of fully or partially coherent optical fields at the single-photon level. Measurements of the transverse spatial Wigner functions for highly attenuated coherent beams are presented and compared with theoretical predictions. (c) 2005 Optical Society of America.
引用
收藏
页码：3365 / 3367
页数：3
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