Near Infrared external cavity tunable laser based on polymer waveguide Bragg gratings

2012 ◽  
Author(s):  
Beom-Jun Cheon ◽  
Nam-Seon Son ◽  
Jun-Whee Kim ◽  
Min-Cheol Oh
Keyword(s):  
Near Infrared ◽  
External Cavity ◽  
Tunable Laser ◽  
Bragg Gratings ◽  
Polymer Waveguide

scholarly journals Near-infrared tunable lasers with polymer waveguide Bragg gratings

2012 ◽  
Vol 20 (2) ◽  
pp. 827 ◽  
Author(s):  
Nam-Seon Son ◽  
Kyung-Jo Kim ◽  
Jun-Whee Kim ◽  
Min-Cheol Oh
Keyword(s):  
Near Infrared ◽  
Bragg Gratings ◽  
Tunable Lasers ◽  
Polymer Waveguide

ScBO<inf>3</inf>:Cr--A room temperature near-infrared tunable laser

1986 ◽  
Vol 22 (10) ◽  
pp. 1931-1933 ◽  
Author(s):  
Shui Lai ◽  
B. Chai ◽  
M. Long ◽  
R. Morris
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Tunable Laser

Five-channel polymer waveguide wavelength division demultiplexer for the near infrared

1991 ◽  
Vol 3 (1) ◽  
pp. 36-38 ◽  
Author(s):  
M.R. Wang ◽  
G.J. Sonek ◽  
R.T. Chen ◽  
T. Jannson
Keyword(s):  
Near Infrared ◽  
Wavelength Division ◽  
Polymer Waveguide

Low-Noise External Cavity Semiconductor Lasers Based on Polarization-Maintaining Fiber Bragg Gratings

2018 ◽  
Vol 45 (6) ◽  
pp. 0601004
Author(s):  
孙广伟 Sun Guangwei ◽  
魏芳 Wei Fang ◽  
张丽 Zhang Li ◽  
陈迪俊 Chen Dijun ◽  
张茜 Zhang Xi ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
External Cavity ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Low Noise ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
External Cavity Semiconductor Lasers

CH Kinetics Measurements and Their Importance for Modeling Prompt NOx Formation in Gas Turbines

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Sean P. Cooper ◽  
Clayton R. Mulvihill ◽  
Olivier Mathieu ◽  
Eric L. Petersen ◽  
Mark W. Crofton ◽  
...  
Keyword(s):  
Shock Tube ◽  
Chemical Kinetics ◽  
Gas Turbines ◽  
Near Infrared ◽  
Elevated Temperatures ◽  
Frequency Doubling ◽  
Tunable Laser ◽  
Detailed Chemical Kinetics ◽  
Reflected Shock ◽  
Time Histories

Abstract Recent work by the authors and others has uncovered the need for further chemical kinetic-related modeling and experiments, specifically for NOx kinetics at engine conditions. In particular, data on CH formation at realistic combustion conditions are needed for further refinement of the prompt-NOx kinetics. To this end, a series of shock-tube experiments to obtain CH concentration time histories at elevated temperatures was performed behind reflected shock waves at the Aerospace Corporation using a tunable laser. This Ti-Sapphire laser was operated in the near infrared at about 854 nm; blue light at 426.9 nm was obtained using an external, frequency-doubling crystal. The resulting light was used in a differential absorption setup with common-mode rejection to measure CH time histories. New measurements in CH4–C2H6–O2 mixtures highly diluted in argon were performed at temperatures between 1890 K and 2719 K. These new data are compared to several modern, detailed chemical kinetics mechanisms with updated NOx submechanisms. Sensitivity and rate of production analyses at the shock-tube conditions along with a gas turbine model are used to elucidate the current state of affairs in CH prediction by the literature models and its effect on NOx production, particularly through the prompt mechanism. A brief discussion of the chemical kinetics for an important reaction in the production of CH is also presented to emphasize the need for further study and refinement of reactions leading to CH production.

Polarization-Resolved Near- and Far-Field Radiation from Near-Infrared Tilted Fiber Bragg Gratings

2014 ◽  
Vol 32 (11) ◽  
pp. 2157-2162 ◽  
Author(s):  
Changyu Shen ◽  
Lingyun Xiong ◽  
Aliaksander Bialiayeu ◽  
Yang Zhang ◽  
Jacques Albert
Keyword(s):  
Near Infrared ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Far Field ◽  
Field Radiation
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