Reducing Optical Losses and Energy-Transfer Upconversion in ErxY2-xSiO5 Waveguides

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Optical losses and energy-transfer upconversion (ETU) in sputter-deposited polycrystalline ErxY2-xSiO5 thin film waveguides are investigated. We find that the high temperature anneal that is necessary for crystallization and optical activation of Er induces grain growth that causes large propagation losses. Through minimizing the grain growth, propagation loss was lowered to 2.2 +/- 0.2 dB/cm while maintaining a high confinement factor of 50%. Changing the target material to minimize sputtering of Er clusters reduced the ETU coefficient to an estimated value of 3.1 +/- 0.2 x 10(-17) cm(3)/s at an Er concentration of 7.6 x 10(20) cm(-3). The maximum level of population inversion was 0.47 +/- 0.02, resulting in signal enhancement of 13.3 dB/cm at 1529 nm.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2013-09
Language
English
Article Type
Article
Keywords

SODA-LIME SILICATE; MU M; GAIN; AL2O3; LUMINESCENCE; EMISSION

Citation

IEEE PHOTONICS TECHNOLOGY LETTERS, v.25, no.18, pp.1801 - 1804

ISSN
1041-1135
DOI
10.1109/LPT.2013.2276455
URI
http://hdl.handle.net/10203/254703
Appears in Collection
NT-Journal Papers(저널논문)
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