Direct Detection Avalanche Photodiode Receiver Design For The NASA/DDLT

1989 ◽  
Author(s):  
J. L. Conner ◽  
J. L. Guggenmos
Keyword(s):  
Direct Detection ◽  
Avalanche Photodiode ◽  
Receiver Design

scholarly journals Performance Analysis of Avalanche Photodiode for Direct Detection LADAR Receivers (Dept.E)

2020 ◽  
Vol 36 (4) ◽  
pp. 53-69
Author(s):  
Mohamed El_Mashade ◽  
H. Konber ◽  
M. Ashour ◽  
A. AboElEzz
Keyword(s):  
Performance Analysis ◽  
Direct Detection ◽  
Avalanche Photodiode

Multihit mode direct-detection laser radar system using a Geiger-mode avalanche photodiode

2010 ◽  
Vol 81 (3) ◽  
pp. 033109 ◽  
Author(s):  
Min Seok Oh ◽  
Hong Jin Kong ◽  
Tae Hoon Kim ◽  
Keun Ho Hong ◽  
Byung Wook Kim ◽  
...  
Keyword(s):  
Direct Detection ◽  
Avalanche Photodiode ◽  
Radar System ◽  
Laser Radar ◽  
Geiger Mode

scholarly journals BER analysis of IM/DD FSO system with APD receiver over gamma-gamma turbulence

2014 ◽  
Vol 11 (1) ◽  
pp. 61-72 ◽  
Author(s):  
Milica Petkovic ◽  
Goran Djordjevic ◽  
Dejan Milic ◽  
Bata Vasic
Keyword(s):  
Path Length ◽  
Thermal Noise ◽  
Direct Detection ◽  
Noise Temperature ◽  
Avalanche Photodiode ◽  
Optical Signal ◽  
Propagation Path ◽  
Free Space Optical ◽  
Scale Models ◽  
Inner Scale

In this paper, the bit-error rate (BER) performance of intensity modulated with direct detection (IM/DD) free space optical (FSO) system using the on-off keying (OOK) and avalanche photodiode (APD) receiver is analyzed. The intensity fluctuations of the received optical signal are modeled by gamma gamma distribution, while both zero and nonzero inner scale models are observed. The total receiver noise includes APD shot noise and thermal noise. The BER expression is theoretically derived and numerical results are presented. The results illustrate the BER dependence on the turbulence strength, propagation path length, APD gain and noise temperature.

Reduction of range walk error in direct detection laser radar using a Geiger mode avalanche photodiode

2010 ◽  
Vol 283 (2) ◽  
pp. 304-308 ◽  
Author(s):  
Min Seok Oh ◽  
Hong Jin Kong ◽  
Tae Hoon Kim ◽  
Keun Ho Hong ◽  
Byung Wook Kim
Keyword(s):  
Direct Detection ◽  
Avalanche Photodiode ◽  
Laser Radar ◽  
Geiger Mode

Detection and Characterization of earth-like Planets

1997 ◽  
Vol 161 ◽  
pp. 299-311 ◽  
Author(s):  
Jean Marie Mariotti ◽  
Alain Léger ◽  
Bertrand Mennesson ◽  
Marc Ollivier
Keyword(s):  
Direct Detection ◽  
Contrast Ratio ◽  
Angular Size ◽  
Physical Nature ◽  
Major Axis ◽  
Infrared Emission ◽  
Space Technology ◽  
Semi Major Axis ◽  
Earth Like Planets ◽  
Visible Wavelengths

AbstractIndirect methods of detection of exo-planets (by radial velocity, astrometry, occultations,...) have revealed recently the first cases of exo-planets, and will in the near future expand our knowledge of these systems. They will provide statistical informations on the dynamical parameters: semi-major axis, eccentricities, inclinations,... But the physical nature of these planets will remain mostly unknown. Only for the larger ones (exo-Jupiters), an estimate of the mass will be accessible. To characterize in more details Earth-like exo-planets, direct detection (i.e., direct observation of photons from the planet) is required. This is a much more challenging observational program. The exo-planets are extremely faint with respect to their star: the contrast ratio is about 10−10at visible wavelengths. Also the angular size of the apparent orbit is small, typically 0.1 second of arc. While the first point calls for observations in the infrared (where the contrast goes up to 10−7) and with a coronograph, the latter implies using an interferometer. Several space projects combining these techniques have been recently proposed. They aim at surveying a few hundreds of nearby single solar-like stars in search for Earth-like planets, and at performing a low resolution spectroscopic analysis of their infrared emission in order to reveal the presence in the atmosphere of the planet of CO H2O and O3. The latter is a good tracer of the presence of oxygen which could be, like on our Earth, released by biological activity. Although extremely ambitious, these projects could be realized using space technology either already available or in development for others missions. They could be built and launched during the first decades on the next century.

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