Enhanced resolution in argon and neon spectra using a Super-Resolution algorithm
1 Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México - PO Box 48-3, 62251, Cuernavaca, Mor., México
2 Instituto de Matemáticas, Universidad Nacional Autónoma de México - Circuito Exterior, C.U., 04510, México D.F., México
Received: 18 December 2015
Accepted: 18 February 2016
This paper presents the principles and application of a super-resolution (SR) technique, based on a L1-norm minimization procedure. In particular, the technique is applied to improve low-resolution resolution spectra as obtained from the optogalvanic effect in neon and argon discharges over the 413–423 nm wavelength range. By applying the super-resolution algorithm to the experimental data, a surprising 70-fold reduction of the linewidth is achieved allowing to resolve prior indistinguishable peaks. It is found that further improvements on the resolution are limited by the signal-to-noise ratio of the original spectra. The importance of a suitable mathematical representation of the experiment and the discussion on other applications of this super-resolution technique in spectroscopy are also presented.
PACS: 32.30.-r – Atomic spectra / 07.05.Kf – Data analysis: algorithms and implementation; data management / 52.38.-r – Laser-plasma interactions
© EPLA, 2016