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We report on the large Kerr induced wavelength shift observed in our hydrogenated amorphous silicon microresonators and demonstrate their use for all-optical modulation and switching on picosecond time scales with only subpicojoule pulse energies.
Spectral cleaning in bottle microresonators is presented by inscribing periodic surface microgrooves. Cleaning down to single strong WGM family is demonstrated, with Qs > 105 (similar to original microresonator).
The coherence properties of a frequency comb generated by a SiN microring resonator is shown to be changed by the feedback through a self tracking, narrowband single longitudinal mode filter in an active fiber loop.
We report an experimental study of transient optomechanically induced transparency (OMIT) using a silica microresonator. The transient OMIT behaviors are observed in good agreement with theoretical calculations based on the coupled-oscillator model.
Commercially packaged optical true-time-delay devices were developed utilizing ultra-low loss silicon nitride microresonators, achieving record tunable delay of 535ps for a 20GHz wide signal, 632ps for a 10GHz wide signal, with tunable loss of 3dB.
Mode interaction in silicon nitride micro-resonators is investigated. We provide clear experimental evidence of mode interaction between two families of transverse modes and demonstrate a link between such interactions and initiation of comb generation in resonators with normal dispersion.
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