Absolute concentration measurements of bacterial CO2 emission using a 2004 nm vertical cavity surface emitting tunable diode laser

2015 ◽  
Author(s):  
A S Zarin ◽  
Arup Lal Chakraborty
Keyword(s):  
Diode Laser ◽  
Tunable Diode Laser ◽  
Cavity Surface ◽  
Absolute Concentration ◽  
Vertical Cavity Surface ◽  
Concentration Measurements ◽  
Vertical Cavity

Oxygen Sensor Based on Tunable Diode Laser Absorption Spectroscopy with a Vertical Cavity Surface-Emitting Laser

2013 ◽  
Vol 760-762 ◽  
pp. 40-44
Author(s):  
Yan Wei Gao ◽  
Yu Jun Zhang ◽  
Dong Chen ◽  
Ying He ◽  
Kun You ◽  
...  
Keyword(s):  
Diode Laser ◽  
Oxygen Concentration ◽  
Tunable Diode Laser ◽  
Cavity Surface ◽  
Laser Absorption ◽  
Vertical Cavity Surface ◽  
On Line ◽  
Surface Emitting Laser ◽  
Vertical Cavity ◽  
Diode Laser Absorption

Oxygen plays a fundamental role in nature and industrial process, the fast on-line oxygen concentration detection is of great significance. Tunable diode laser absorption spectroscopy (TDLAS) is capable high selective, high sensitive, non-intrusive, this technique exploits the diode laser tunable and narrow bandwidth characteristics, by selecting one absorption line of the target gas to avoid interference from other gas and realize oxygen concentration fast on-line detection. In this paper, we use vertical cavity surface-emitting laser (VCSEL) as the light source, adopting the wavelength modulation spectroscopy and the harmonic detection technology to measure the second harmonic signal and realize oxygen concentration fast on-line detection. The detection concentration range between 0.1% to 40% and detection accuracy is 0.1%.

Type II W, interband cascade and vertical-cavity surface-emitting mid-IR lasers

1998 ◽  
Vol 145 (5) ◽  
pp. 275-280 ◽  
Author(s):  
J.R. Meyer ◽  
D. Zhang ◽  
W.W. Bewley ◽  
C.L. Felix ◽  
L. Goldberg ◽  
...  
Keyword(s):  
Cavity Surface ◽  
Type Ii ◽  
Vertical Cavity Surface ◽  
Vertical Cavity

Recent developments in the area of vertical cavity surface emitting lasers

1999 ◽  
Vol 09 (PR2) ◽  
pp. Pr2-3 ◽  
Author(s):  
J. Jacquet ◽  
P. Salet ◽  
A. Plais ◽  
F. Brillouet ◽  
E. Derouin ◽  
...  
Keyword(s):  
Cavity Surface ◽  
Surface Emitting Lasers ◽  
Recent Developments ◽  
Vertical Cavity Surface ◽  
Emitting Lasers ◽  
Vertical Cavity

Failure Analysis of Vertical Cavity Surface Emission Laser Diodes

2003 ◽  
Author(s):  
F. Siegelin ◽  
C. Brillert
Keyword(s):  
Failure Analysis ◽  
Complete Analysis ◽  
Cavity Surface ◽  
Dislocation Network ◽  
Plan View ◽  
Surface Emission ◽  
Optical Output ◽  
Vertical Cavity Surface ◽  
Vcsel Arrays ◽  
Vertical Cavity

Abstract A failure analysis case study for oxide confined vertical cavity surface emitting laser (VCSEL) arrays will be presented. The focus of this work is on devices failing with a reduced optical output due to a rapid degradation of the laser diode. The complete analysis flow will be shown, including electrical and optical characterization as well as detailed investigations on a nanometer scale. It is known that these fails are caused by dislocations. An advanced FIB preparation method enabled cross-section and plan view TEM to successfully visualize the complete extent of a dislocation network.

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