Engineering lattice matching, doping level, and optical properties of KY(WO4)2:Gd,Lu,Yb layers for a cladding-side-pumped channel waveguide laser

S. Aravazhi, D. Geskus, Koop van Dalfsen, Sergio Andrés Vázquez-Córdova, C. Grivas, U. Griebner, Sonia Maria García Blanco, Markus Pollnau

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Abstract

Single-crystalline KY1-x-y-zGdxLuyYbz(WO4)2 layers are grown onto undoped KY(WO4)2 substrates by liquid-phase epitaxy. The purpose of co-doping the KY(WO4)2 layer with suitable fractions of Gd3+ and Lu3+ is to achieve lattice-matched layers that allow us to engineer a high refractive-index contrast between waveguiding layer and substrate for obtaining tight optical mode confinement and simultaneously accommodate a large range of Yb3+ doping concentrations by replacing Lu3+ ions of similar ionic radius for a variety of optical amplifier or laser applications. Crack-free layers, up to a maximum lattice mismatch of ~0.08 %, are grown with systematic variations of Y3+, Gd3+, Lu3+, and Yb3+ concentrations, their refractive indices are measured at several wavelengths, and Sellmeier dispersion curves are derived. The influence of co-doping on the spectroscopy of Yb3+ is investigated. As evidenced by the experimental results, the lattice constants, refractive indices, and transition cross-sections of Yb3+ in these co-doped layers can be approximated with good accuracy by weighted averages of data from the pure compounds. The obtained information is exploited to fabricate a twofold refractive-index-engineered sample consisting of a highly Yb3+-doped tapered channel waveguide embedded in a passive planar waveguide, and a cladding-side-pumped channel waveguide laser is demonstrated.
Original languageUndefined
Pages (from-to)433-446
Number of pages14
JournalApplied physics B: Lasers and optics
Volume111
Issue number3
DOIs
Publication statusPublished - May 2013

Keywords

  • IOMS-APD: Active Photonic Devices
  • IR-86216
  • METIS-297681
  • EWI-23407

Cite this

Aravazhi, S. ; Geskus, D. ; van Dalfsen, Koop ; Vázquez-Córdova, Sergio Andrés ; Grivas, C. ; Griebner, U. ; García Blanco, Sonia Maria ; Pollnau, Markus. / Engineering lattice matching, doping level, and optical properties of KY(WO4)2:Gd,Lu,Yb layers for a cladding-side-pumped channel waveguide laser. In: Applied physics B: Lasers and optics. 2013 ; Vol. 111, No. 3. pp. 433-446.
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abstract = "Single-crystalline KY1-x-y-zGdxLuyYbz(WO4)2 layers are grown onto undoped KY(WO4)2 substrates by liquid-phase epitaxy. The purpose of co-doping the KY(WO4)2 layer with suitable fractions of Gd3+ and Lu3+ is to achieve lattice-matched layers that allow us to engineer a high refractive-index contrast between waveguiding layer and substrate for obtaining tight optical mode confinement and simultaneously accommodate a large range of Yb3+ doping concentrations by replacing Lu3+ ions of similar ionic radius for a variety of optical amplifier or laser applications. Crack-free layers, up to a maximum lattice mismatch of ~0.08 {\%}, are grown with systematic variations of Y3+, Gd3+, Lu3+, and Yb3+ concentrations, their refractive indices are measured at several wavelengths, and Sellmeier dispersion curves are derived. The influence of co-doping on the spectroscopy of Yb3+ is investigated. As evidenced by the experimental results, the lattice constants, refractive indices, and transition cross-sections of Yb3+ in these co-doped layers can be approximated with good accuracy by weighted averages of data from the pure compounds. The obtained information is exploited to fabricate a twofold refractive-index-engineered sample consisting of a highly Yb3+-doped tapered channel waveguide embedded in a passive planar waveguide, and a cladding-side-pumped channel waveguide laser is demonstrated.",
keywords = "IOMS-APD: Active Photonic Devices, IR-86216, METIS-297681, EWI-23407",
author = "S. Aravazhi and D. Geskus and {van Dalfsen}, Koop and V{\'a}zquez-C{\'o}rdova, {Sergio Andr{\'e}s} and C. Grivas and U. Griebner and {Garc{\'i}a Blanco}, {Sonia Maria} and Markus Pollnau",
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year = "2013",
month = "5",
doi = "10.1007/s00340-013-5353-1",
language = "Undefined",
volume = "111",
pages = "433--446",
journal = "Applied physics B: Lasers and optics",
issn = "0946-2171",
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Engineering lattice matching, doping level, and optical properties of KY(WO4)2:Gd,Lu,Yb layers for a cladding-side-pumped channel waveguide laser. / Aravazhi, S.; Geskus, D.; van Dalfsen, Koop; Vázquez-Córdova, Sergio Andrés; Grivas, C.; Griebner, U.; García Blanco, Sonia Maria; Pollnau, Markus.

In: Applied physics B: Lasers and optics, Vol. 111, No. 3, 05.2013, p. 433-446.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Engineering lattice matching, doping level, and optical properties of KY(WO4)2:Gd,Lu,Yb layers for a cladding-side-pumped channel waveguide laser

AU - Aravazhi, S.

AU - Geskus, D.

AU - van Dalfsen, Koop

AU - Vázquez-Córdova, Sergio Andrés

AU - Grivas, C.

AU - Griebner, U.

AU - García Blanco, Sonia Maria

AU - Pollnau, Markus

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PY - 2013/5

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N2 - Single-crystalline KY1-x-y-zGdxLuyYbz(WO4)2 layers are grown onto undoped KY(WO4)2 substrates by liquid-phase epitaxy. The purpose of co-doping the KY(WO4)2 layer with suitable fractions of Gd3+ and Lu3+ is to achieve lattice-matched layers that allow us to engineer a high refractive-index contrast between waveguiding layer and substrate for obtaining tight optical mode confinement and simultaneously accommodate a large range of Yb3+ doping concentrations by replacing Lu3+ ions of similar ionic radius for a variety of optical amplifier or laser applications. Crack-free layers, up to a maximum lattice mismatch of ~0.08 %, are grown with systematic variations of Y3+, Gd3+, Lu3+, and Yb3+ concentrations, their refractive indices are measured at several wavelengths, and Sellmeier dispersion curves are derived. The influence of co-doping on the spectroscopy of Yb3+ is investigated. As evidenced by the experimental results, the lattice constants, refractive indices, and transition cross-sections of Yb3+ in these co-doped layers can be approximated with good accuracy by weighted averages of data from the pure compounds. The obtained information is exploited to fabricate a twofold refractive-index-engineered sample consisting of a highly Yb3+-doped tapered channel waveguide embedded in a passive planar waveguide, and a cladding-side-pumped channel waveguide laser is demonstrated.

AB - Single-crystalline KY1-x-y-zGdxLuyYbz(WO4)2 layers are grown onto undoped KY(WO4)2 substrates by liquid-phase epitaxy. The purpose of co-doping the KY(WO4)2 layer with suitable fractions of Gd3+ and Lu3+ is to achieve lattice-matched layers that allow us to engineer a high refractive-index contrast between waveguiding layer and substrate for obtaining tight optical mode confinement and simultaneously accommodate a large range of Yb3+ doping concentrations by replacing Lu3+ ions of similar ionic radius for a variety of optical amplifier or laser applications. Crack-free layers, up to a maximum lattice mismatch of ~0.08 %, are grown with systematic variations of Y3+, Gd3+, Lu3+, and Yb3+ concentrations, their refractive indices are measured at several wavelengths, and Sellmeier dispersion curves are derived. The influence of co-doping on the spectroscopy of Yb3+ is investigated. As evidenced by the experimental results, the lattice constants, refractive indices, and transition cross-sections of Yb3+ in these co-doped layers can be approximated with good accuracy by weighted averages of data from the pure compounds. The obtained information is exploited to fabricate a twofold refractive-index-engineered sample consisting of a highly Yb3+-doped tapered channel waveguide embedded in a passive planar waveguide, and a cladding-side-pumped channel waveguide laser is demonstrated.

KW - IOMS-APD: Active Photonic Devices

KW - IR-86216

KW - METIS-297681

KW - EWI-23407

U2 - 10.1007/s00340-013-5353-1

DO - 10.1007/s00340-013-5353-1

M3 - Article

VL - 111

SP - 433

EP - 446

JO - Applied physics B: Lasers and optics

JF - Applied physics B: Lasers and optics

SN - 0946-2171

IS - 3

ER -