scholarly journals Sirius: a prototype astronomical intensity interferometer using avalanche photodiodes in linear mode

2020 ◽  
Vol 500 (4) ◽  
pp. 5630-5638
Author(s):  
Junghwan Oh ◽  
Jan Wagner ◽  
Sascha Trippe ◽  
Taeseok Lee ◽  
Bangwon Lee ◽  
...  

ABSTRACT Optical intensity interferometry, developed in the 1950s, is a simple and inexpensive method for achieving angular resolutions on microarcsecond scales. Its low sensitivity has limited intensity interferometric observations to bright stars so far. Substantial improvements are possible by using avalanche photodiodes (APDs) as light detectors. Several recent experiments used APDs in single-photon detection mode; however, these either provide low electronic bandwidths (few MHz) or require very narrow optical bandpasses. We present here the results of laboratory measurements with a prototype astronomical intensity interferometer using two APDs observing an artificial star in continuous (‘linear’) detection mode with an electronic bandwidth of 100 MHz. We find a photon–photon correlation of about 10−6, as expected from the ratio of the coherence times of the light source and the detectors. In a configuration where both detectors are on the optical axis (zero baseline), we achieve a signal-to-noise ratio of ∼2700 after 10 min of integration. When measuring the correlation as a function of baseline, we find a Gaussian correlation profile with a standard deviation corresponding to an angular half-width of the artificial star of 0.55 arcsec, in agreement with the estimate by the manufacturer. Our results demonstrate the possibility to construct large astronomical intensity interferometers using linear-mode APDs.

2003 ◽  
Vol 83 (14) ◽  
pp. 2955-2957 ◽  
Author(s):  
Y. Kang ◽  
H. X. Lu ◽  
Y.-H. Lo ◽  
D. S. Bethune ◽  
W. P. Risk

2010 ◽  
Vol 19 (8) ◽  
pp. 080308 ◽  
Author(s):  
Liu Yun ◽  
Wu Qing-Lin ◽  
Han Zheng-Fu ◽  
Dai Yi-Min ◽  
Guo Guang-Can

2010 ◽  
Vol 24 (03) ◽  
pp. 357-362
Author(s):  
JIANPING GUO ◽  
CHANGJUN LIAO ◽  
ZHENGJUN WEI ◽  
JINDONG WANG

A passive quench circuit is used to study the punch-through characters of avalanche photodiodes under the Geiger mode. The photocurrent–voltage curve indicated clearly the punch-through voltage while the dark current–voltage curve is insensitive to the punch-through. The experiments demonstrate different distributions of the carries. The dark carriers counts increase much faster than the photo-carriers counts due to the different collection efficiency. A proper selection of the bias can increase the signal-to-noise ratio (SNR) of the single photon detector.


1996 ◽  
Vol 35 (12) ◽  
pp. 1956 ◽  
Author(s):  
S. Cova ◽  
M. Ghioni ◽  
A. Lacaita ◽  
C. Samori ◽  
F. Zappa

2005 ◽  
Author(s):  
William G. Lawrence ◽  
Christopher Stapels ◽  
Frank L. Augustine ◽  
James F. Christian

2004 ◽  
Vol 51 (9-10) ◽  
pp. 1351-1357 ◽  
Author(s):  
A. Dorokhov ◽  
A. Glauser ◽  
Y. Musienko ◽  
C. Regenfus ◽  
S. Reucroft ◽  
...  

Nano Letters ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 582-590 ◽  
Author(s):  
Alan C. Farrell ◽  
Xiao Meng ◽  
Dingkun Ren ◽  
Hyunseok Kim ◽  
Pradeep Senanayake ◽  
...  

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