Photonic Microresonators Created by Slow Optical Cooking

Gardosi, Gabriella; Mangan, B. J.; Puc, G.; Sumetsky, M.

doi:10.1021/acsphotonics.0c01851

Cited by 25 publications

(15 citation statements)

References 60 publications

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“…In our second experiment, we fabricated a 0.5 mm long BMR which is much deeper than those previously demonstrated in SNAP technology [14][15][16][17][18][19][20][21][22][23][24][25] and also than BMRs presented in Fig. 2.…”

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confidence: 91%

“…Several fabrication methods of SNAP devices have been developed. They include CO2 laser annealing [14][15][16][17], introduction of internal stresses by femtosecond laser inscription [18][19][20], variation of the fiber refractive index by local heating [21,22], mechanical tuning by strong bending of optical fibers [23], exploring capillary fibers with a droplet inside [24], slow cooking of microresonators in the capillary fibers [25], as well as fiber tapering [26]. While most of these methods have exceptional precision, they allow the introduction of effective fiber radius variation (ERV) of the fiber by several nanometers only.…”

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confidence: 99%

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Microresonator devices lithographically introduced at the optical fiber surface

et al. 2021

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We present a simple lithographic method for fabrication of microresonator devices at the optical fiber surface. First, we undress the predetermined surface areas of a fiber segment from the polymer coating with a focused C O 2 laser beam. Next, using the remaining coating as a mask, we etch the fiber in a hydrofluoric acid solution. Finally, we completely undress the fiber segment from coating to create a chain of silica bottle microresonators with nanoscale radius variation [surface nanoscale axial photonics (SNAP) microresonators]. We demonstrate the developed method by fabrication of a chain of five 1 mm long and 30 nm high microresonators at the surface of a 125 µm diameter optical fiber and a single 0.5 mm long and 291 nm high microresonator at the surface of a 38 µm diameter fiber. As another application, we fabricate a rectangular 5 mm long SNAP microresonator at the surface of a 38 µm diameter fiber and investigate its performance as a miniature delay line. The propagation of a 100 ps pulse with 1 ns delay, 0.035c velocity, and negligible dispersion is demonstrated. In contrast to previously developed approaches in SNAP technology, the developed method allows the introduction of much larger fiber radius variation ranging from nanoscale to microscale.

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confidence: 91%

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confidence: 99%

Microresonator devices lithographically introduced at the optical fiber surface

et al. 2021

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“…Therefore, we suggest that a much broader bandwidth multichannel device can be created as well. To this end, the WGMs with radial quantum numbers except for the fundamental one with 𝑝𝑝 = 0 have to be suppressed using, e.g., a microcapillary fiber with a thin wall (see e.g., [25] and references therein) and the fiber radius should be adjusted to arrive at the required azimuthal free spectral range.…”

Section: (A) and (B) Which Indicates Suppression Of Reflections From ...mentioning

confidence: 99%

Enhancing the impedance matched bandwidth of bottle microresonator signal processing devices

Sumetsky

Zaki

2021

Opt. Lett.

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Light pulses entering an elongated bottle microresonator (BMR) from a transversely oriented input–output waveguide (microfiber) slowly propagate along the BMR length and bounce between turning points at its constricting edges. To avoid insertion losses and processing errors, a pulse should completely transfer from the waveguide into the BMR and, after being processed, completely return back into the waveguide. For this purpose, the waveguide and BMR should be impedance matched along the pulse bandwidth. Here we show how to enhance the impedance matched bandwidth by optimization of the BMR effective radius variation in a small vicinity of the input–output waveguide.

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“…The application of SNAP bottle microresonators (SBMs) with shallow nanoscale ERV, which are introduced at the surface of optical fibres [23][24][25][26][27] , constitutes an alternative and promising approach to generate OFCs with low repetition rates. Optical eigenmodes in SNAP microresonators are whispering gallery modes (WGMs) adjacent to the fibre surface and slowly bouncing between turning points along the microresonator axial length.…”

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Optimized frequency comb spectrum of parametrically modulated bottle microresonators

2023

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Optical frequency combs generated by parametric modulation of optical microresonators are usually described by lumped-parameter models, which do not account for the spatial distribution of the modulation. This study highlights the importance of this spatial distribution in the Surface Nanoscale Axial Photonics (SNAP) platform, specifically for elongated SNAP bottle microresonators with a shallow nanometre-scale effective radius variation along its axial length. SNAP bottle microresonators have much smaller free spectral range and may have no dispersion compared to microresonators with other shapes (e.g., spherical and toroidal), making them ideal for generating optical frequency combs with lower repetition rates. By modulating parabolic SNAP bottle microresonators resonantly and adiabatically, we show that the flatness and bandwidth of the optical frequency comb spectra can be enhanced by optimizing the spatial distribution of the parametric modulation. The optimal spatial distribution can be achieved experimentally using piezoelectric, radiation pressure, and electro-optical excitation of a SNAP bottle microresonator.

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Photonic Microresonators Created by Slow Optical Cooking

Cited by 25 publications

References 60 publications

Microresonator devices lithographically introduced at the optical fiber surface

Microresonator devices lithographically introduced at the optical fiber surface

Enhancing the impedance matched bandwidth of bottle microresonator signal processing devices

Optimized frequency comb spectrum of parametrically modulated bottle microresonators

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