Spectroscopy of erbium-doped potassium double tungstate waveguides

Sergio A. Vázquez-Córdova, Shanmugam Aravazhi, Christos Grivas, Alexander M. Heuer, Christian Kränkel, Yean Sheng Yong, Sonia M. García-Blanco, Jennifer L. Herek, Markus Pollnau

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)
23 Downloads (Pure)


We report the spectroscopy of crystalline waveguide amplifiers operating in the telecom C-band. Thin films of erbiumdoped gadolinium lutetium potassium double tungstate, KGdxLuyEr1-x-y (WO4)2, are grown by liquid-phase epitaxy onto undoped potassium yttrium double tungstate (KYW) substrates and micro-structured by Ar+-beam etching. Channel waveguides with erbium concentrations between 0.45-6.35 × 1020 cm-3 are characterized. The transition cross-sections of interest are estimated. The effect of energy-transfer up-conversion (ETU) is experimentally investigated. Microscopic and macroscopic ETU parameters are extracted from a simultaneous analysis of 20 decay curves of luminescence on the transition 4I13/24I15/2. The correlation between ETU and the doping concentration is studied. Pump excited-state absorption (ESA) on the transition 4I11/24F7/2 is investigated via a direct ESA measurement using a double-modulation pump-probe technique. The effect of ESA is studied for different pump wavelengths. The pump wavelength of 984.5 nm is found to be favorable for the complete range of erbium concentrations.

Original languageEnglish
Title of host publicationIntegrated Optics: Devices, Materials, and Technologies XXI
ISBN (Electronic)9781510606531
Publication statusPublished - 16 Feb 2017
EventSPIE Optoelectronics and Photonic Materials and Devices Conference, OPTO 2017 - The Moscone Center, San Francisco, United States
Duration: 30 Jan 20171 Feb 2017


ConferenceSPIE Optoelectronics and Photonic Materials and Devices Conference, OPTO 2017
Abbreviated titleOPTO
Country/TerritoryUnited States
CitySan Francisco


  • Crystalline waveguides
  • EDWA
  • Rare-earth doped
  • Waveguide amplifiers
  • 22/4 OA procedure


Dive into the research topics of 'Spectroscopy of erbium-doped potassium double tungstate waveguides'. Together they form a unique fingerprint.

Cite this