PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
Laser Emission of a blue ECDL at a single transverse mode (TEM00) was confirmed and Raman spectra of O2 and N2 in the atmosphere were acquired using the intra-cavity beam of the ECDL. The center wavelength of the diode laser is 416 nm in the blue region of the visible spectrum. A Fabry-Perot resonator composed of two high reflectivity mirrors was used as an external cavity and a fraction of the intra-cavity beam was feedbacked to the anti-reflection coated facet of the diode laser. The optical feedback makes it possible that the diode laser oscillates stably at a specific frequency in the gain band of the laser diode chip. This configuration includes only four optics and has potential to be utilized as a compact Raman gas sensor that can be mounted on drones or the other machines. The detection limits in 1 second integration time were estimated to be lower than 100 ppm in the case of N2 gas and 200 ppm in O2, respectively.
Y. Ichikawa andI. Asahi
"Development of a compact gas sensor system using an ECDL by laser Raman spectroscopy", Proc. SPIE 11160, Electro-Optical Remote Sensing XIII, 111600E (10 October 2019); https://doi.org/10.1117/12.2533021
ACCESS THE FULL ARTICLE
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
Y. Ichikawa, I. Asahi, "Development of a compact gas sensor system using an ECDL by laser Raman spectroscopy," Proc. SPIE 11160, Electro-Optical Remote Sensing XIII, 111600E (10 October 2019); https://doi.org/10.1117/12.2533021