Channel waveguides and Mach-Zehnder structures on RbTiOPO4 by Cs+ ion exchange
Channel waveguides and Mach-Zehnder structures on RbTiOPO4 by Cs+ ion exchange
Cs+ ion exchange in RbTiOPO4 and (Yb,Nb):RTP/RTP(001) has been used to locally increase the refractive indices for waveguide circuit fabrication. Ti masks were fabricated on RTP samples by conventional photolithography. Cs+ exchange was done using a CsNO3 melt at 698 K during 2 h. Elemental analysis confirms an Cs+ profile with a variable depth. Apparently the Cs+ exchange is disfavored in the doped epitaxial sample. The refractive index variation is higher for nz than for nx,y. Near-field images of the guided modes at 633, 1064 and 1520 nm were recorded. The optical characterization shows propagation losses of 5 dB/cm at 1520 nm.
1183-1194
Butt, M.A.
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Pujol, M.C.
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Solé, R.
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Ródenas, A.
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Lifante, G.
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Wilkinson, J.S.
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Aguiló, M.
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Díaz, F.
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22 April 2015
Butt, M.A.
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Pujol, M.C.
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Solé, R.
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Ródenas, A.
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Lifante, G.
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Wilkinson, J.S.
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Aguiló, M.
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Díaz, F.
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Butt, M.A., Pujol, M.C., Solé, R., Ródenas, A., Lifante, G., Wilkinson, J.S., Aguiló, M. and Díaz, F.
(2015)
Channel waveguides and Mach-Zehnder structures on RbTiOPO4 by Cs+ ion exchange.
Optical Materials Express, 5 (5), .
(doi:10.1364/OME.5.001183).
Abstract
Cs+ ion exchange in RbTiOPO4 and (Yb,Nb):RTP/RTP(001) has been used to locally increase the refractive indices for waveguide circuit fabrication. Ti masks were fabricated on RTP samples by conventional photolithography. Cs+ exchange was done using a CsNO3 melt at 698 K during 2 h. Elemental analysis confirms an Cs+ profile with a variable depth. Apparently the Cs+ exchange is disfavored in the doped epitaxial sample. The refractive index variation is higher for nz than for nx,y. Near-field images of the guided modes at 633, 1064 and 1520 nm were recorded. The optical characterization shows propagation losses of 5 dB/cm at 1520 nm.
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ome 5-5-1183.pdf
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Accepted/In Press date: 11 April 2015
Published date: 22 April 2015
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 386307
URI: http://eprints.soton.ac.uk/id/eprint/386307
PURE UUID: c59e0804-9838-469b-8349-e4f735516526
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Date deposited: 22 Jan 2016 16:04
Last modified: 15 Mar 2024 02:34
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Author:
M.A. Butt
Author:
M.C. Pujol
Author:
R. Solé
Author:
A. Ródenas
Author:
G. Lifante
Author:
M. Aguiló
Author:
F. Díaz
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