Four-port SNAP microresonator device


It is well known from quantum mechanics that the transmission amplitude of a symmetric double-barrier structure can approach unity at the resonance condition. A similar phenomenon is observed in optics for light which propagates between two waveguides weakly coupled through a microresonator. Examples of microresonators used for this purpose include ring, photonic crystal, toroidal, and bottle microresonators. However, ring and photonic crystal photonic circuits, once fabricated, cannot be finely tuned to arrive at the mentioned resonant condition. In turn, it is challenging to predictably adjust coupling to toroidal and bottle microresonators by translating the input–output microfibers, since the modes of these resonators are difficult to separate spatially. Here we experimentally demonstrate a four-port micro-device based on a SNAP microresonator introduced at the surface of an optical fiber. The eigenmodes and corresponding eigenwavelengths of this resonator are clearly identified for both polarization states by the spectrograms measured along the length of the fiber. This allows us to choose the resonant wavelength and simultaneously determine the positions of the input–output microfiber tapers to arrive at the required resonance condition.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Additional Information: This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Uncontrolled Keywords: Fiber fabrication,Optical fibers,Polarization,Resonant modes,Ring resonators,Silica fibers,Atomic and Molecular Physics, and Optics
Publication ISSN: 1539-4794
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Related URLs: https://www.osa ... i=ol-44-14-3498 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2019-07-10
Published Online Date: 2019-06-17
Accepted Date: 2019-06-14
Authors: Crespo-Ballesteros, Manuel (ORCID Profile 0000-0002-0592-4726)
Yang, Yong
Toropov, N. (ORCID Profile 0000-0002-0297-3661)
Sumetsky, Misha (ORCID Profile 0000-0001-7289-3547)



Version: Accepted Version

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