Title :
Engineering the Sensitivity and Response Time of Edge-Emitting Laser Hydrogen Sensors
Author :
Griffin, Benjamin G. ; Arbabi, Amir ; Goddard, L.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA
Abstract :
Simulation results and experimental measurements are presented for ridge waveguide edge-emitting lasers with a palladium thin film integrated for hydrogen gas detection. The palladium film experiences a refractive index change when in contact with hydrogen, causing a shift in the laser´s output power and wavelength. It is found that the sensitivity of the device can be controlled by altering the width of the ridge waveguide, and the response time can be controlled by regulating the operating temperature of the device.
Keywords :
gas sensors; refractive index; semiconductor lasers; edge-emitting laser hydrogen sensors; operating temperature; refractive index; response time engineering; ridge waveguide edge-emitting lasers; sensitivity engineering; Diode lasers; Gas detectors; Laser sensors; Optoelectronic and photonic sensors;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2013.2260327