Pedestal disk resonator in potassium yttrium double tungstate

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Abstract

Rare earth ion doped potassium double tungstates (e.g. KY(WO4)2, KYb(WO 4 ) 2 , and KGd(WO 4 ) 2 ) have long been used as laser and amplifier materials thanks to the high achievable gain provided by the rare-earth ions. This family of host materials is also very attractive for nonlinear optics due to their high nonlinear refractive index and Raman gain. Very efficient on-chip solid state lasers, frequency combs, supercontinuum sources and Raman lasers could be realized if high refractive index waveguides with the correct dispersion were developed. To date, the demonstrated integrated devices in rare-earth ion doped potassium double tungstates have shown very promising results, including high gain in on-chip amplifiers and high efficiency and output power in on-chip lasers. These devices, however, were fabricated using low refractive index contrast waveguides, which are not suitable for ring resonators or to achieve anomalous dispersion. High refractive index contrast KY(WO 4 ) 2 waveguides with high confinement are therefore needed as building blocks for active devices. In this work, pedestal disk resonators are proposed, based on a combination of swift ion irradiation, focused ion beam milling and a novel wet etching process. In-coupling of light into the first fabricated pedestal disks will be presented.
Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Subtitle of host publicationDevices, Materials, and Technologies XXII
PublisherSPIE
Volume10535
ISBN (Electronic)9781510615557
ISBN (Print)9781510615557
DOIs
Publication statusPublished - 1 Jan 2018
EventSPIE Optoelectronics and Photonic Materials and Devices Conference, OPTO 2018 - The Moscone Center, San Francisco, United States
Duration: 28 Jan 20182 Feb 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10535

Conference

ConferenceSPIE Optoelectronics and Photonic Materials and Devices Conference, OPTO 2018
Abbreviated titleOPTO
CountryUnited States
CitySan Francisco
Period28/01/182/02/18

Keywords

  • Disk resonator
  • integrated optics
  • Ion irradiation
  • KYW
  • Wet etch
  • ion irradiation
  • disk resonator
  • wet etch

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