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Mirrorless buried waveguide laser in monoclinic double tungstates fabricated by a novel combination of ion milling and liquid phase epitaxy

Mirrorless buried waveguide laser in monoclinic double tungstates fabricated by a novel combination of ion milling and liquid phase epitaxy
Mirrorless buried waveguide laser in monoclinic double tungstates fabricated by a novel combination of ion milling and liquid phase epitaxy
Buried channel waveguides were fabricated by liquid phase epitaxial growth of a lattice-matched KY0.58Gd0.22Lu0.17Tm0.03(WO4)2 film on a microstructured KY(WO4)2 substrate. Channels were transferred to the substrates by standard photolithography and Ar-ion milling. The bottom and sidewalls of the milled channels were smooth enough (rms roughness = 70 nm and 20 nm, respectively) to favour the epitaxial growth of the active layer without defects at the boundary of substrate/epitaxial layer. The refractive index contrast was sufficient to enable light confinement and guided modes with low scattering losses were observed at wavelengths between 1440 nm and 1640 nm. CW laser operation at 1840 nm at room temperature was observed with feedback provided only by Fresnel reflection at the end faces, with slope efficiencies of 4% and 9% for TE and TM polarizations, respectively.
1094-4087
26937-26945
Bolaños, Western
23026441-f9e6-44cf-95c2-c59892e65def
Carvajal, Joan J.
6464e62b-838e-4dce-a833-a7d776f02b71
Mateos-Planas, Xavier
444f69bb-2ab3-4f56-be17-3f286f7700da
Murugan, Ganapathy Senthil
a867686e-0535-46cc-ad85-c2342086b25b
Subramanian, Ananth Z.
634f1b3f-45a7-48d8-817c-be88ff70d235
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Cantelar, Eugenio
8c4c9870-8f0b-4440-bcba-db60b32f1bda
Jaque, Daniel
6da18d1d-87e4-44bb-ab43-9bc008c732be
Lifante, Ginés
f4cc16d9-bfcd-483e-ac94-34e897922ee0
Aguiló, Magdalena
2d313857-5b54-4da3-bbb2-014133cc6241
Díaz, F.
babe7378-e970-4195-beab-84f41b1694a4
Bolaños, Western
23026441-f9e6-44cf-95c2-c59892e65def
Carvajal, Joan J.
6464e62b-838e-4dce-a833-a7d776f02b71
Mateos-Planas, Xavier
444f69bb-2ab3-4f56-be17-3f286f7700da
Murugan, Ganapathy Senthil
a867686e-0535-46cc-ad85-c2342086b25b
Subramanian, Ananth Z.
634f1b3f-45a7-48d8-817c-be88ff70d235
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Cantelar, Eugenio
8c4c9870-8f0b-4440-bcba-db60b32f1bda
Jaque, Daniel
6da18d1d-87e4-44bb-ab43-9bc008c732be
Lifante, Ginés
f4cc16d9-bfcd-483e-ac94-34e897922ee0
Aguiló, Magdalena
2d313857-5b54-4da3-bbb2-014133cc6241
Díaz, F.
babe7378-e970-4195-beab-84f41b1694a4

Bolaños, Western, Carvajal, Joan J., Mateos-Planas, Xavier, Murugan, Ganapathy Senthil, Subramanian, Ananth Z., Wilkinson, James S., Cantelar, Eugenio, Jaque, Daniel, Lifante, Ginés, Aguiló, Magdalena and Díaz, F. (2010) Mirrorless buried waveguide laser in monoclinic double tungstates fabricated by a novel combination of ion milling and liquid phase epitaxy. Optics Express, 18 (26), 26937-26945. (doi:10.1364/OE.18.026937).

Record type: Article

Abstract

Buried channel waveguides were fabricated by liquid phase epitaxial growth of a lattice-matched KY0.58Gd0.22Lu0.17Tm0.03(WO4)2 film on a microstructured KY(WO4)2 substrate. Channels were transferred to the substrates by standard photolithography and Ar-ion milling. The bottom and sidewalls of the milled channels were smooth enough (rms roughness = 70 nm and 20 nm, respectively) to favour the epitaxial growth of the active layer without defects at the boundary of substrate/epitaxial layer. The refractive index contrast was sufficient to enable light confinement and guided modes with low scattering losses were observed at wavelengths between 1440 nm and 1640 nm. CW laser operation at 1840 nm at room temperature was observed with feedback provided only by Fresnel reflection at the end faces, with slope efficiencies of 4% and 9% for TE and TM polarizations, respectively.

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Published date: 2010

Identifiers

Local EPrints ID: 176669
URI: https://eprints.soton.ac.uk/id/eprint/176669
ISSN: 1094-4087
PURE UUID: 14856c09-6a81-4318-b234-826cb62604f3
ORCID for Ganapathy Senthil Murugan: ORCID iD orcid.org/0000-0002-2733-3273
ORCID for James S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

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Date deposited: 10 Mar 2011 11:18
Last modified: 29 Aug 2019 00:56

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Contributors

Author: Western Bolaños
Author: Joan J. Carvajal
Author: Xavier Mateos-Planas
Author: Ananth Z. Subramanian
Author: Eugenio Cantelar
Author: Daniel Jaque
Author: Ginés Lifante
Author: Magdalena Aguiló
Author: F. Díaz

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