Properties of a laser cavity containing an absorbing ring.
This paper considers the transverse optical properties of an absorbing ring when it is lighted by a symmetrical Laguerre-Gauss beam TEM(p0). It is demonstrated that the insertion of an opaque ring having adequate size inside a diaphragmed laser cavity is able to improve greatly (rate of about 100%) the discrimination between the TEM(00) and the TEM(10) modes, while keeping the diffraction losses unchanged or even decreased.
Hasnaoui
Abdelkrim
A
Laboratoire d'Electronique Quantique, Faculté de Physique, Université des Sciences et de la Technologie Houari Boumédiène, B.P. n degrees 32, El Alia, 16111 Algiers, Algeria.
Ait-Ameur
Kamel
K