Efficiency Tunable All-Optical Controlled Coupled-Mode Induced Transparency in a Microsphere Resonator

In this work, based on a dual-laser pumping scheme, an all-optical controlled coupled-mode induced transparency (CMIT) in a silica microsphere resonator (MSR) has been demonstrated, experimentally and theoretically. This proposed scheme is stable, simple and power efficient. More interestingly, by changing the power of one of the lasers, which functions as the heat source, the wavelength shifting rate of the CMIT can be changed. Our experimental results reveals that when the power of the laser acting as the heat source increases from 1 mW to 5 mW, the wavelength shifting rate experiences a nearly two times increase.