Low-threshold interband cascade lasers operating above room temperature

2004 ◽  
Vol 20 (3-4) ◽  
pp. 486-490 ◽  
Author(s):  
Cory J. Hill ◽  
Baohua Yang ◽  
Rui Q. Yang
Keyword(s):  
Room Temperature ◽  
Low Threshold ◽  
Interband Cascade Lasers ◽  
Cascade Lasers

Room temperature continuous wave interband cascade lasers for gas sensing

2012 ◽  
Author(s):  
S. Höfling ◽  
R. Weih ◽  
A. Bauer ◽  
M. Kamp ◽  
A. Forchel
Keyword(s):  
Room Temperature ◽  
Continuous Wave ◽  
Gas Sensing ◽  
Interband Cascade Lasers ◽  
Cascade Lasers

scholarly journals Continuous-wave interband cascade lasers operating above room temperature at λ = 47-56 μm

2012 ◽  
Vol 20 (3) ◽  
pp. 3235 ◽  
Author(s):  
William W. Bewley ◽  
Chadwick L. Canedy ◽  
Chul Soo Kim ◽  
Mijin Kim ◽  
Charles D. Merritt ◽  
...  
Keyword(s):  
Room Temperature ◽  
Continuous Wave ◽  
Interband Cascade Lasers ◽  
Cascade Lasers

scholarly journals Continuous-wave operation of vertically emitting ring interband cascade lasers at room temperature

2020 ◽  
Vol 116 (13) ◽  
pp. 131101 ◽  
Author(s):  
Hedwig Knötig ◽  
Borislav Hinkov ◽  
Robert Weih ◽  
Sven Höfling ◽  
Johannes Koeth ◽  
...  
Keyword(s):  
Room Temperature ◽  
Continuous Wave ◽  
Continuous Wave Operation ◽  
Interband Cascade Lasers ◽  
Cascade Lasers

scholarly journals Photoacoustic Detection of Short-Chained Hydrocarbon Isotopologues

Proceedings ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 23
Author(s):  
Loh ◽  
Wolff
Keyword(s):  
Atmospheric Pressure ◽  
Room Temperature ◽  
Continuous Wave ◽  
Stable Carbon Isotope ◽  
Distributed Feedback ◽  
Light Sources ◽  
Photoacoustic Detection ◽  
Optoacoustic Spectroscopy ◽  
Interband Cascade Lasers ◽  
Cascade Lasers

We report, to our knowledge, the first optical detection of the main isotopologues of short-chained hydrocarbons. The sensor system is based on photoacoustic (also known as optoacoustic) spectroscopy (PAS, OAS). This technique takes advantage of the fact that absorbed electromagnetic radiation is partially transferred into kinetic energy via inelastic molecular collisions. This is equivalent to a temperature increase of the irradiated volume. If the radiation is modulated, a pressure wave with an amplitude proportional to the concentration of the absorbing molecules is generated, the so called PA (OA) signal. Two continuous wave (cw), thermoelectrically cooled (TEC), distributed feedback interband cascade lasers (DFB-ICLs) with emission wavelengths around 3.33 and 3.38 μm, respectively, serve as light sources. The PA signal is detected with a microphone and phase-sensitively amplified. The new sensor is applied for the stable carbon isotope-selective analyses of methane (CH4), ethane (C2H6) and propane (C3H8). We report first measurements of 12C2H6, 13C12CH6 and 13C2H6 as well as of 12C3H8 and 13C12C2H8, all at approximate room temperature and atmospheric pressure. The listed isotopologues were selected because of their importance for numerous applications from atmospheric and planetary research to natural gas exploration.

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