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Channel waveguides and Mach-Zehnder structures on RbTiOPO4 by Cs+ ion exchange

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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Butt, M.A.
8c9fbdb2-90f4-44c1-a31b-f8d1b79a3be5
Pujol, M.C.
0a9fb054-d26a-4651-a706-a4af1eb8212f
Solé, R.
1a1a97ea-3cba-4fa4-b476-1bbbe7ebd9a9
Ródenas, A.
9419beb4-1a3a-4fd0-a4b9-fc720fba4717
Lifante, G.
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Wilkinson, J.S.
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Aguiló, M.
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Díaz, F.
babe7378-e970-4195-beab-84f41b1694a4

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), 1183-1194. (doi:10.1364/OME.5.001183).

Record type: Article

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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Accepted/In Press date: 11 April 2015
Published date: 22 April 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 386307
URI: https://eprints.soton.ac.uk/id/eprint/386307
PURE UUID: c59e0804-9838-469b-8349-e4f735516526
ORCID for J.S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

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Date deposited: 22 Jan 2016 16:04
Last modified: 05 Nov 2019 02:10

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