1/f Noise Characteristics of a Photodiode Signal Under Illumination by a Linearly Polarized Diode Laser

2012 ◽  
Vol 62 (5) ◽  
pp. 503 ◽  
Author(s):  
Handoko Djati ◽  
Hyun Kim Dong
Keyword(s):  
Diode Laser ◽  
Noise Characteristics ◽  
Linearly Polarized ◽  
Photodiode Signal

scholarly journals Towards standards for measuring greenhouse gas fluxes from agricultural fields using instrumented towers

2006 ◽  
Vol 86 (3) ◽  
pp. 373-400 ◽  
Author(s):  
E. Pattey ◽  
G. Edwards ◽  
I B Strachan ◽  
R L Desjardins ◽  
S. Kaharabata ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Greenhouse Gas ◽  
Diode Laser ◽  
Eddy Covariance ◽  
Tunable Diode Laser ◽  
Trace Gas ◽  
Noise Characteristics ◽  
Short Period ◽  
Flux Measurements

This is a discussion of the available technology for measuring turbulent fluxes using instrumented towers. This review focuses on the flux measurements of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) for agricultural systems and the development of standards and protocols for measuring them. Agroecosystems present unique challenges because they undergo large leaf area index (LAI) and canopy architecture changes in a relatively short period of time (i.e., months) coupled with the fact that many of the greenhouse gas sources are diffuse. This review examines all aspects of the theory and application of the micrometeorological techniques, with focus on the flux gradient, eddy accumulation and eddy covariance techniques. Instrument placement, sens or response and noise characteristics are also explored. Innovative applications of micrometeorological methods are discussed for closed- and open-path trace gas sensors and commonly used meteorological instrumentation. The use of fast response single-pass optical tunable diode laser (i.e., CH4, N2O) and infrared gas analyzers (i.e., CO2, H2O) is described. Consideration is also taken of the trace gas sensors’flow system design, mixing ratio measurement, and data acquisition and reduction requirements for micrometeorological flux measurement. Procedures are outlined for the meteorological instrumentation necessary for eddy covariance-based energy budget measurement including ultrasonic anemometry. Key words: Tower-based greenhouse gas flux measurements, nitrous oxide, methane, carbon dioxide, tunable diode laser

The Feasibility of a Semiconductor-Laser Glucose-Detection System for Insulin-Pump Therapy

1987 ◽  
Vol 110 ◽  
Author(s):  
I. C. Arrieta ◽  
D. E. Burk ◽  
C. Batich
Keyword(s):  
Semiconductor Laser ◽  
Diode Laser ◽  
Insulin Pump ◽  
Detection System ◽  
External Cavity ◽  
Polarized Light ◽  
Insulin Pump Therapy ◽  
Glucose Detection ◽  
Pump Therapy ◽  
Linearly Polarized

AbstractA potentially implantable semiconductor-laser-based sensor is demonstrated to be feasible for glucose detection at concentrations found in the human blood. In the system, the monochromatic, linearly polarized light from a diode laser is directed into an external cavity with a second diode laser at the far end. The cavity is filled with a glucose solution of varying physiological concentrations. The interference of the rotated, polarized light from the first diode laser with that of the second laser is monitored by a photodiode, forming an optoelectronic pair with the first diode laser. A variation in glucose concentration of 0.1 to 0.3 g/dl results in a 5% variation in the photodiode current. This variation is sufficient to provide feedback to an insulin pump.

Wideband noise characteristics of a lead-salt diode laser: possibility of quantum noise limited TDLAS performance

1989 ◽  
Vol 28 (9) ◽  
pp. 1638 ◽  
Author(s):  
Peter Werle ◽  
Franz Slemr ◽  
Manfred Gehrtz ◽  
Christof Bräuchle
Keyword(s):  
Diode Laser ◽  
Quantum Noise ◽  
Lead Salt ◽  
Noise Characteristics ◽  
Wideband Noise ◽  
Lead Salt Diode Laser

scholarly journals Frequency noise characteristics of a diode laser and its application to physical random number generation

2013 ◽  
Vol 52 (1) ◽  
pp. 014302 ◽  
Author(s):  
Shinya Maehara ◽  
Kohei Kawakami ◽  
Hideaki Arai ◽  
Kenji Nakano ◽  
Kohei Doi ◽  
...  
Keyword(s):  
Diode Laser ◽  
Random Number ◽  
Random Number Generation ◽  
Frequency Noise ◽  
Number Generation ◽  
Noise Characteristics

Interferometric measurement of low-frequency phase noise characteristics of diode laser-pumped Nd:YAG ring laser

1989 ◽  
Vol 25 (12) ◽  
pp. 774 ◽  
Author(s):  
K.J. Williams ◽  
A. Dandridge ◽  
A.D. Kersey ◽  
J.F. Weller ◽  
A.M. Yurek ◽  
...  
Keyword(s):  
Phase Noise ◽  
Diode Laser ◽  
Ring Laser ◽  
Low Frequency ◽  
Noise Characteristics ◽  
Interferometric Measurement ◽  
Frequency Phase

Infrared diode laser jet spectroscopy of the van der Waals complex (N2O)2

1997 ◽  
Vol 91 (4) ◽  
pp. 689-696 ◽  
Author(s):  
HAI-BO QIAN ◽  
WOUTER HERREBOUT ◽  
BRIAN HOWARD
Keyword(s):  
Diode Laser ◽  
Van Der Waals ◽  
Van Der Waals Complex

Indocyanine green-augmented diode laser therapy of telangiectatic and reticular leg veins: a clinical proof-of-concept trial

2012 ◽  
Vol 25 (01) ◽  
Author(s):  
A Klein ◽  
G Shafirstein ◽  
E Kohl ◽  
W Bäumler ◽  
M Landthaler ◽  
...  
Keyword(s):  
Indocyanine Green ◽  
Laser Therapy ◽  
Diode Laser ◽  
Proof Of Concept

Noise Characteristics of a Reduced Blade Count Rotor with Improved Stage Efficiency

2019 ◽  
Author(s):  
Rainer Schädler ◽  
◽  
Dominic Hänni ◽  
Anestis Kalfas ◽  
Reza Abhari ◽  
...  
Keyword(s):  
Noise Characteristics ◽  
Stage Efficiency

Noise Characteristics and Thermal Decay in Single-layer Perpendicular Recording Media

1998 ◽  
Vol 22 (S_3_PMRS_98) ◽  
pp. S3_5-8
Author(s):  
Y. Hirayama ◽  
Y. Honda ◽  
K. Ito ◽  
T. Takeuchi ◽  
M. Futamoto
Keyword(s):  
Single Layer ◽  
Recording Media ◽  
Thermal Decay ◽  
Perpendicular Recording ◽  
Noise Characteristics
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