Resumen de Analysis of the frequency response of a dynamically modulated, high Q, optical fiber ring resonator
Anna I Garrigues Navarro, Luis A. Sánchez, Martina Delgado-Pinar, Antonio Díez, Miguel Vicente Andrés Bou
In this work we analyze the optical transmittance of a high-Q fiber ring resonator in both the stationary case, and when the phase of the cavity is rapidly modulated. The frequency of the modulation signal plays a role in the transmittance of the device, as it is compared with the cavity lifetime.
First, we present the experimental characterization of a stationary fiber ring resonator setup with a 99:1 singlemode coupler and 1 m cavity length. The bandwidth of the resonances is 8.5 fm (Q = 1.83×108), and the finesse is 110. Second, we analyze the response of the output signal when the cavity phase is dynamically modulated. The frequency be havior of the transmittance is alike that of a low-bandpass filter: the higher the Q-value of the cavity, the lower the cutoff frequency of the filter. This feature has an effect on the selection of the optimal resonator for sensing applications.
