Fabrication of a microtoroidal resonator with picometer precise resonant wavelength

Liu, Xiao-Fei; Lei, Fuchuan; Gao, Ming; Xu, Yang; Qin, Guo-Qing; Long, Gui Lu

doi:10.1364/ol.41.003603

Cited by 20 publications

(8 citation statements)

References 38 publications

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“…3] shows that, with the same working voltage step, the resonance frequency tuning is finer for a bigger sphere. In this work we achieved a 650 kHz frequency tuning for a microsphere with R = 118.34 µm, which is far more precise than previous work [34,41].…”

Section: A the Repeatability And Precision Of The Frequency Tuningmentioning

confidence: 69%

Arbitrary function resonance tuner of the optical microcavity with sub-MHz resolution

Zhang

Wang

et al. 2019

Opt. Lett.

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The resonance frequency of an optical whispering gallery mode (WGM) microcavity is extremely important in its various applications. Many efforts have been made to fine tune this parameter. Here, we report the design and implementation of a function resonance tuner of an optical microcavity with resolution about 650 kHz (7 pm @ 1450 nm band), 20% of the optical WGM linewidth. A piezoelectric nano-positioner is used to mechanically compress the microsphere in its axial direction. The ultrafine frequency tuning is achieved benefitting from the much less changes in the axial direction than equatorial semiaxes of the microsphere and the sub-nanometer resolution of the nano-positioner. The tuning of the resonance can be made to an arbitrary function, dynamically, with near perfect accuracy. We have demonstrated the periodically tuning of resonance in the sine and sigmoid function respectively, both with over 99% fitting accuracy. This work expands the application of microresonators greatly, especially microspheres with ultrahigh quality factor, in multi-mode coupling system or time-floquet system.

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Section: A the Repeatability And Precision Of The Frequency Tuningmentioning

confidence: 69%

Arbitrary function resonance tuner of the optical microcavity with sub-MHz resolution

Zhang

Wang

et al. 2019

Opt. Lett.

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“…The wavelength of the tunable laser was controlled by a trianglewave signal that was also recorded by the oscilloscope. This was the arrangement used to measure transmission spectra of the SLM [41].…”

Section: Experiments Setup and Resultsmentioning

confidence: 99%

Experimental observation of Fano-like resonance in a whispering-gallery-mode microresonator in aqueous environment

Shang

Lin

2017

Photon. Res.

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We report on the transmission spectra of a sausage-like microresonator (SLM) in aqueous environment, where a fiber taper is used as a light coupler. The transmission spectra show an interesting dependence on the coupling position between the SLM and the fiber taper. When the SLM is moved along the fiber taper, the line shape can evolve periodically among symmetric dips, asymmetric Fano-like resonance line shapes, and symmetric peaks. A coupled-mode theory with feedback is developed to explain the observation. The observation of Fano-like resonance in aqueous environment holds great potential in biochemical sensing.

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“…Tuning WGM resonance is critical for many applications, for example, PT symmetry, 20 tunable microlaser, [86][87][88] optical filter, 89 99 electro-thermal, 100 internal aerostatic pressure, 101,102 chemical etching, 103 laser polishing, 104 etc. Every technique has its own limitation.…”

Section: Thermo-optic Tuningmentioning

confidence: 99%

Optothermal dynamics in whispering-gallery microresonators

2020

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Optical whispering-gallery-mode microresonators with ultrahigh quality factors and small mode volumes have played an important role in modern physics. They have been demonstrated as a diverse platform for a wide range of photonics applications, such as nonlinear optics, optomechanics, quantum optics, and information processing. Thermal behaviors induced by power buildup in resonators or environmental perturbations are ubiquitous in high-quality-factor whispering-gallery-mode resonators and have played an important role in their operation for various applications. Here in this review, we discuss the mechanisms of laser field induced thermal nonlinear effects, including thermal bistability and thermal oscillation. With the help of the thermal bistability effect, optothermal spectroscopy and optical non-reciprocity have been demonstrated. On the other hand, by tuning the temperature of the environment, the resonant mode frequency will shift, which could also be used for thermal sensing/tuning applications. Thermal locking technique and thermal imaging mechanisms are discussed briefly. Last, we review some techniques to realize thermal stability in a high-quality-factor resonator system.

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Fabrication of a microtoroidal resonator with picometer precise resonant wavelength

Cited by 20 publications

References 38 publications

Arbitrary function resonance tuner of the optical microcavity with sub-MHz resolution

Arbitrary function resonance tuner of the optical microcavity with sub-MHz resolution

Experimental observation of Fano-like resonance in a whispering-gallery-mode microresonator in aqueous environment

Optothermal dynamics in whispering-gallery microresonators

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