The Wave Comb Acupressure Tool for Pain Management and Anxiety

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The SCFs used in this work were fabricated via the molten core drawing (MCD) technique 35. The MCD method is the most practical of the SCF production approaches as it can rapidly produce long lengths of fibre that are compatible with traditional fibre post-processing procedures. The as-drawn MCD SCFs possess a polycrystalline silicon core with typical core/cladding diameters of ~12 μm/125 μm, as detailed in the Methods. To transform the SCFs into low loss nonlinear parametric mixers that are robust and user-friendly, a multi-step tapering and splicing approach is employed. These post-processing steps are important to enhance the efficiency of the nonlinear processing in the SCFs for a number of key reasons. First, the tapering process is used both to reduce the core size as well as to improve the crystalline quality, and hence, the optical transmission 36. This results in a SCF with core/cladding diameters of ~5 μm/125 μm and a transmission loss of 3 dB/cm. Second, a modified taper method is applied to further reduce the core size and fabricate nano-spike couplers on the end facets of the fibre. The role of the couplers is to better match the modes of the SCFs with those of the standard single-mode fibres (SSMFs), as well as to suppress reflections at the SCF/SSMF interface when splicing. In conclusion, managing the pain of childbirth is a unique and individual experience for every Woman. While some choose to use medication or other medical interventions, many are now turning to natural remedies and alternative techniques to help cope with the discomfort. With the right techniques and tools, Women can feel empowered and in control during the childbirth process, creating a positive and transformative experience for both Mother and child. Yasui, T. et al. Terahertz frequency metrology based on frequency comb. IEEE J. Sel. Top. Quantum Electron. 17, 191–201 (2011).

Bose, S. et al. Spin entanglement witness for quantum gravity. Phys. Rev. Lett. 119, 240401 (2017).Fortier, T. M. et al. Generation of ultrastable microwaves via optical frequency division. Nat. Photonics 5, 425–429 (2011). Boggio, J. C.; Moro, S.; Windmiller, J. R.; Zlatanovic, S.; Myslivets, E.; Alic, N.; Radic, S. (2009). "Optical frequency comb generated by four-wave mixing in highly nonlinear fibers". Cleo/Qels 2009: 1–2. Kippenberg, T. J., Gaeta, A. L., Lipson, M. & Gorodetsky, M. L. Dissipative kerr solitons in optical microresonators. Science 361, eaan8083 (2018). the second harmonic can be generated in a long crystal so that by consecutive sum frequency generation and difference frequency generation the spectrum of first and second harmonic widens until they overlap.

Torres-Company, V. et al. Laser frequency combs for coherent optical communications. J. Lightwave Technol. 37, 1663–1670 (2019). Yin, L. & Agrawal, G. P. Impact of two-photon absorption on self-phase modulation in silicon waveguides. Opt. Lett. 32, 2031–2033 (2007). Data Controller means the natural or legal person who (either alone or jointly or in common with other persons) determines the purposes for which and the manner in which any personal information are, or are to be, processed. Deakin, C. & Liu, Z. Noise and distortion analysis of dual frequency comb photonic rf channelizers. Opt. Express 28, 39750–39769 (2020).Høj, D. et al. Ultra-coherent nanomechanical resonators based on inverse design. Nat. Commun. 12, 5766 (2021).

Norte, R. A., Moura, J. P. & Gröblacher, S. Mechanical resonators for quantum optomechanics experiments at room temperature. Phys. Rev. Lett. 116, 147202 (2016). Kandula, Dominik Z.; Gohle, Christoph; Pinkert, Tjeerd J.; Ubachs, Wim; Eikema, Kjeld S.E. (2 August 2010). "Extreme ultraviolet frequency comb metrology". Physical Review Letters. 105 (6): 063001. arXiv: 1004.5110. Bibcode: 2010PhRvL.105f3001K. doi: 10.1103/PhysRevLett.105.063001. PMID 20867977. S2CID 2499460.The as-drawn SCFs are fabricated using the molten core fibre drawing (MCD) technique. This process uses a standard fibre drawing tower to heat and melt the silicon core that is surrounded by a softened silica cladding (drawing temperature of 1950 °C), which acts as a crucible to retain the fibre profile as it is drawn down, as detailed in ref. 50. A thin layer of calcium oxide is included as an interfacial barrier between the core and cladding during the drawing process, which limits dissolution of silica from the cladding into the silicon core and reduces the thermal strain arising from high-temperature processing. The as-drawn SCFs have a poly-crystalline core material with uniform core/cladding diameters of 12 μm/125 μm. To improve the crystalline quality and reduce the losses of the as-drawn fibres, we insert the original SCFs into a silica capillary (400 μm/150 μm inner/outer diameter) and taper this down to have core/cladding diameters of about 5 μm/125 μm. The fabrication is realised using a glass processing system (Vytran GPX-3400-V4), which is widely accessible for heat-polishing, tapering and splicing. We arrived at 8.15pm and I held the comb throughout contractions until the moment I had to push. Lola Clive was born at 9.44pm weighing 8lb 4oz.