RT Journal Article
T1 Maximization of the optical intra-cavity power of whispering-gallery mode resonators via coupling prism
A1 Santamaria Botello, Gabriel Arturo
A1 García Muñoz, Luis Enrique
A1 Sedlmeir, F.
A1 Preu, S.
A1 Segovia Vargas, Daniel
A1 Abdalmalak Dawoud, Kerlos Atia
A1 Llorente Romano, Sergio
A1 García Lampérez, Alejandro
A1 Malzer, S.
A1 Dohler, D. H.
A1 Schwefel, H. G. L.
A1 Weber, H. B.
AB In this paper, a detailed description of the optical coupling into a Whispering Gallery Mode (WGM) resonator through a prism via frustrated total internal reflection (FTIR) is presented. The problem is modeled as three media with planar interfaces and closed expressions for FTIR are given. Then, the curvature of the resonator is taken into account and the mode overlap is theoretically studied. A new analytical expression giving the optimal geometry of a disc-shaped or ring-shaped resonator for maximizing the intra-cavity circulating power is presented. Such expression takes into consideration the spatial distribution of the WGM at the surface of the resonator, thus being more accurate than the currently used expressions. It also takes into account the geometry of the prism. It is shown an improvement in the geometry values used with the current expressions of about 30%. The reason why the pump laser signal can be seen in experiments under critical coupling is explained on this basis. Then, the conditions required for exciting the highest possible optical power inside the resonator are obtained. The aim is to achieve a highly-efficient up-conversion of a THz signal into the optical domain via the second-order nonlinearity of the resonator material.
PB Optica
SN 1094-4087
YR 2016
FD 2016-11-14
LK https://hdl.handle.net/10016/36464
UL https://hdl.handle.net/10016/36464
LA eng
NO This work has been financially supported by "DiDaCTIC: Desarrollo de un sistema de comunicaciones inalámbrico en rango THz integrado de alta tasa de datos", TEC2013-47753-C3, CAM S2013/ICE-3004 "DIFRAGEOS" projects, "Proyecto realizado con la Ayuda Fundación BBVA a Investigadores y Creadores Culturales 2016" and "Estancias de movilidad de profesores PRX16/00021".
DS e-Archivo
RD 1 sept. 2024