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A high quality factor (Q) microcavity is an efficient device for generating a Kerr comb via a four-wave mixing process inside the cavity [1]. Kerr comb platforms are candidates for such applications as optical frequency combs, optical communications, arbitrary waveform generation, and microwave oscillators. Although a silica toroid microcavity (Fig. 1(a)) also has good characteristics for Kerr comb...
Optical Kerr comb source on chip by using a whispering gallery mode (WGM) microcavity is gaining attention due to the small size and low power. The generation of Kerr comb is based on a cascaded four-wave mixing (FWM), and the system exhibit a pulsed output when the generated comb is in a mode-locked state. The time-domain picture of the mode-locking is explained by circulating a soliton pulse in...
Mobile terminals are required to cover wide range of RF frequencies for the enhancement of mobile communication systems. Thus reconfigurable RF circuits for the terminals attract much attention because they flexibly change many frequency bands under the control of the communication systems. Reconfigurable bandpass filter (BPF) with eight-frequency selection capability has been studied for this goal...
Critical coupling and mechanically robust coupling between a whispering-gallery mode and a tapered fiber is simultaneously demonstrated by using an octagonal toroid microcavity with a theoretical Q of 8.8×106 and an experimental value of 2.2×104.
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