Open AccessCapacitors go optical: wavelength independent broadband mode cavity
Author(s) -
Sébastien Loranger,
Mathieu Gagné,
Raman Kashyap
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.014253
Subject(s) - optics , free spectral range , resonator , fabry–pérot interferometer , fiber bragg grating , chirp , broadband , optoelectronics , wavelength , materials science , grating , resonance (particle physics) , physics , laser , particle physics
Fabry-Perot resonators or interferometers (FPI) have existed for a long time and act as light accumulators. However, their applications have been limited to the allowed resonance modes in the cavity, which are defined by the specific free-spectral range of the FPI. We show here a novel concept involving a light "capacitor" capable of accumulating light over a wide spectral range, at any given repetition frequency. This device is actually an FPI in which a high chirped mirror (chirped fiber Bragg grating or chirp multi-layer coated mirror) is added to remove the wavelength dependence of the mode resonances, enabling a single very large broad-band mode. This "modification" does not affect the amount of light which can be accumulated, i.e. it does not reduce the Q-factor of the cavity. We show here the theoretical concept of such a device and experimental results demonstrating this principle.