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Title: Fiber-integrated phase-change reconfigurable optical attenuator
Authors: Martins, Tiago
Gholipour, Behrad
Piccinotti, Davide
MacDonald, Kevin F.
Peacock, Anna C.
Frazão, Orlando
Zheludev, Nikolay I.
Keywords: Science::Physics
Issue Date: 2019
Source: Martins, T., Gholipour, B., Piccinotti, D., MacDonald, K. F., Peacock, A. C., Frazão, O., & Zheludev, N. I. (2019). Fiber-integrated phase-change reconfigurable optical attenuator. APL Photonics, 4(11), 111301-. doi:10.1063/1.5116000
Journal: APL Photonics
Abstract: We report on the experimental demonstration of an optical-fiber-integrated, nonvolatile transmission switching device. The operating mechanism exploits a cavity resonance spectral shift associated with an induced change in the refractive index of a high-index thin film on the polished side facet of the fiber. In the present case, a thermally induced amorphous-crystalline structural transition in a 500 nm layer of germanium antimony telluride at a distance of 500 nm from the core-cladding interface of an SMF-28 single-mode fiber delivers resonant transmission contrast >0.5 dB/mm at 1315 nm. Contrast is a function of active layer proximity to the core, while operating wavelength is determined by layer thickness—varying thickness by a few tens of nanometers can provide for tuning over the entire near-infrared telecoms spectral range.
ISSN: 2378-0967
DOI: 10.1063/1.5116000
Rights: © 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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