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Emission and absorption cross section spectra of Er3+ in LiNbO3 crystals codoped with indium

Published online by Cambridge University Press:  27 April 2011

De-Long Zhang ,
Li Qi ,
Ping-Rang Hua ,
Dao-Yin Yu ,
Juan-Antonio Vallés  and
Edwin Yue-Bun Pun
De-Long Zhang*
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Optoelectronics Information and Technology (Tianjin University), Ministry of Education, Tianjin, 300072, People’s Republic of China
Li Qi
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Optoelectronics Information and Technology (Tianjin University), Ministry of Education, Tianjin, 300072, People’s Republic of China
Ping-Rang Hua
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Optoelectronics Information and Technology (Tianjin University), Ministry of Education, Tianjin, 300072, People’s Republic of China
Dao-Yin Yu
Affiliation:
Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China; and Key Laboratory of Optoelectronics Information and Technology (Tianjin University), Ministry of Education, Tianjin, 300072, People’s Republic of China
Juan-Antonio Vallés
Affiliation:
Department of Applied Physics-I3A, Universidad de Zaragoza, 50009 Zaragoza, Spain
Edwin Yue-Bun Pun
Affiliation:
Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: dlzhang@tju.edu.cn
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Abstract

We have measured at room temperature polarized visible and near-infrared and unpolarized mid-infrared (2.7 μm) emission spectra of Er3+ in LiNbO3 (LN) crystals grown from congruent melts doped with 0.0/0.5, 0.5/0.5, and 1.0/0.5 mol%/mol% In2O3/Er2O3. From the measured emission spectra, the emission and absorption cross section spectral distributions were analyzed based on McCumber theory and discussed in comparison with those spectra of only Er-doped LN bulk material and/or Ti: Er: LN waveguide structure and with the results from the unpolarized absorption measurements. For the 530 and 1530 nm transitions, the cross section value, polarization dependence, and spectral shape all change from the only Er-doped material to the In–Er-codoped crystal and show definite In2O3 doping level effect. The 559, 673, 996, and 1530 nm emission lifetimes were also measured and used to evaluate nonradiative multiphonon relaxation rate. The calculated radiative, measured lifetimes, and multiphonon relaxation rate also show In-codoping effects.

Keywords

CrystalErPhotoemission
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 10 , 28 May 2011 , pp. 1316 - 1325
Copyright
Copyright © Materials Research Society 2011

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