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(Color online) Experimental setup for the measurement of ring resonator’s parameters. Inset: Optical image of ring resonator with description of ports and directions of light propagation. (TL) tunable laser, (SM) single mode fiber with polarization controller, (PF) fiber-optic in-line polarizer, (PMS) polarization maintaining fiber-optic splitter, (TF) polarization maintaining tapered fiber, (L) objective lens, (A) analyzer, (PD) photodetector, (TC) thermocouple, (TEC) thermoelectric controller, (OSA) optical spectrum analyzer, and (DAS) data acquisition system.
(Color online) (a) Measured and (b) calculated resonance peaks of TE and TM modes.
(Color online) (a) Spectral characteristics measured from the drop port for ring resonators with different separation gaps. (b) Splitting of resonance caused by the roughness of waveguide walls. (c) Resonance peak with the superimposed waveguide oscillations.
(Color online) (a) Thermal characteristic of ring resonator. (b) Examples of resonance peak shift for three different temperatures.
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