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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 11 — Nov. 1, 2008
  • pp: 1850–1853

Amplification in epitaxially grown Er:(Gd,Lu)2O3 waveguides for active integrated optical devices

Andreas Kahn, Henning Kühn, Sebastian Heinrich, Klaus Petermann, Jonathan D. B. Bradley, Kerstin Wörhoff, Markus Pollnau, Yury Kuzminykh, and Günter Huber  »View Author Affiliations


JOSA B, Vol. 25, Issue 11, pp. 1850-1853 (2008)
http://dx.doi.org/10.1364/JOSAB.25.001850


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Abstract

Monocrystalline lattice matched Er(0.6 at.%):(Gd,Lu)2O3 films with nearly atomically flat surfaces and thicknesses up to 3 μm have been grown on Y2O3 substrates using pulsed laser deposition. The emission cross sections were comparable with the ones of Er:Y2O3 bulk crystals, showing only a marginal spectral broadening. Rib channel waveguiding could be demonstrated after structuring the films with reactive ion etching. Gain measurements have been performed and the results compared with a theoretical gain spectrum. A gain of 5.9 dB/cm could be measured at 1535.5 nm through in-band pumping at 1480 nm. The scattering losses in such a 7 mm long rib waveguide have been determined to be below 4.4 dB at 632.8 nm. An extrapolation to the gain wavelength with the λ−4-Rayleigh law of scattering resulted in losses of 0.2 dB/cm at 1.5 μm.

© 2008 Optical Society of America

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(230.7380) Optical devices : Waveguides, channeled
(310.1860) Thin films : Deposition and fabrication
(230.4480) Optical devices : Optical amplifiers

ToC Category:
Optical Devices

History
Original Manuscript: August 8, 2008
Manuscript Accepted: September 9, 2008
Published: October 15, 2008

Citation
Andreas Kahn, Henning Kühn, Sebastian Heinrich, Klaus Petermann, Jonathan D. B. Bradley, Kerstin Wörhoff, Markus Pollnau, Yury Kuzminykh, and Günter Huber, "Amplification in epitaxially grown Er:(Gd,Lu)2O3 waveguides for active integrated optical devices," J. Opt. Soc. Am. B 25, 1850-1853 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-11-1850

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