European Meet on Laser, Optics & Photonics
University Of Sciences ans Technology Houari Boumediene USTHB, Algiers 16111, Algeria
Title: Stabilzed laser cavity modeling, comparison with other models
Biography: Ahmed AISSANI
It is well known that the Lamb dip characterizing the emitted line shape at the output of a low gain gas laser, can be used as a good frequency standard. It is for this reason that it continues to arouse the interest of scientists in view of the different applications that it may have, particularly in the spectral characterization of materials, spectroscopy, plasma physics and metrology. However, the line shape is generally asymmetrical and, in this case, the frequency of the Lamb dip does not coincide with the resonant frequency of the laser. It is essential, for a good standard, that these two frequencies . When this is the case, the line shape is symmetrical. For this, several models of laser cavities, called "stabilized cavities", have been proposed in the literature. These models are supposed to give rise to symmetrical lineshapes.
In this work, we revisit some of these models in order to highlight the limit of their validity and then, through an appropriate choice of the geometry of the cavity, a "stabilized" cavity model giving rise to a symmetrical lineshape will be proposed. such a cavity can serve as a good standard of frequencies and lengths.