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Title: Yb{sup 3+},Er{sup 3+} codoped silica-based glasses for planar optical waveguide amplifiers

Abstract

Spectroscopic properties of Er{sup 3+}-doped and Yb{sup 3+},Er{sup 3+}-codoped sodium- and alumino-silicate glasses, potential planar optical waveguide amplifier materials for 1.55 {mu}m, are investigated. With the exception of {sup 4}I{sub 1 3/2}, multiphonon relaxation is dominant for all Er{sup 3+} excited-state multiplets, allowing efficient population of the emitting {sup 4}I{sub 1 3/2} state by {sup 4}I{sub 1 1/2} excitation around 980 nm. In both glasses, multiphonon relaxation from {sup 4}I{sub 1 3/2} is negligible up to 678 K, and the respective 300 K absolute quantum yields are {similar_to}0.9 for 0.05 mol% Er{sup 3+}-doped samples under low- power {sup 4}I{sub 1 1/2} excitation. OH{sup {minus}} impurities are able to efficiently quench {sup 4}I{sub 1 3/2} excitation. Absolute {sup 4}I{sub 1 3/2} quantum yields are used to predict an optimum Yb{sup 3+},Er{sup 3+} concentration range for sensitization. Yb{sup 3+} codotation strongly enhances pump-light absorption and increases {sup 4}I{sub 1 3/2} population by almost two orders of magnitude in some samples. Relative {sup 2}H{sub 1 1/2}/{sup 4}S{sub 3/2} upconversion luminescence intensities are shown to be a sensitive measure for the substantial internal sample heating observed in Yb{sup 3+} codoped glasses.

Authors:
; ;  [1]; ; ; ; ; ;  [2]
  1. Los Alamos National Lab., NM (United States)
  2. AT and T Bell Labs., Murray Hill, NJ (United States)
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
212691
Report Number(s):
LA-UR-96-0315; CONF-960137-3
ON: DE96008135
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 11. topical meeting on advanced solid-state lasers, San Francisco, CA (United States), 31 Jan - 3 Feb 1996; Other Information: PBD: [1996]
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; GLASS; WAVEGUIDES; AMPLIFIERS; OPTICAL EQUIPMENT; DOPED MATERIALS; ERBIUM IONS; YTTERBIUM IONS; EXCITED STATES

Citation Formats

Hehlen, M.P., Gosnell, T.R., Cockroft, N.J., Bruce, A.J., Grodkiewicz, W.H., Nykolak, G., Shmulovich, J., Gosh, R., and Barros, M.R.X. Yb{sup 3+},Er{sup 3+} codoped silica-based glasses for planar optical waveguide amplifiers. United States: N. p., 1996. Web.
Hehlen, M.P., Gosnell, T.R., Cockroft, N.J., Bruce, A.J., Grodkiewicz, W.H., Nykolak, G., Shmulovich, J., Gosh, R., & Barros, M.R.X. Yb{sup 3+},Er{sup 3+} codoped silica-based glasses for planar optical waveguide amplifiers. United States.
Hehlen, M.P., Gosnell, T.R., Cockroft, N.J., Bruce, A.J., Grodkiewicz, W.H., Nykolak, G., Shmulovich, J., Gosh, R., and Barros, M.R.X. Mon . "Yb{sup 3+},Er{sup 3+} codoped silica-based glasses for planar optical waveguide amplifiers". United States. doi:. https://www.osti.gov/servlets/purl/212691.
@article{osti_212691,
title = {Yb{sup 3+},Er{sup 3+} codoped silica-based glasses for planar optical waveguide amplifiers},
author = {Hehlen, M.P. and Gosnell, T.R. and Cockroft, N.J. and Bruce, A.J. and Grodkiewicz, W.H. and Nykolak, G. and Shmulovich, J. and Gosh, R. and Barros, M.R.X.},
abstractNote = {Spectroscopic properties of Er{sup 3+}-doped and Yb{sup 3+},Er{sup 3+}-codoped sodium- and alumino-silicate glasses, potential planar optical waveguide amplifier materials for 1.55 {mu}m, are investigated. With the exception of {sup 4}I{sub 1 3/2}, multiphonon relaxation is dominant for all Er{sup 3+} excited-state multiplets, allowing efficient population of the emitting {sup 4}I{sub 1 3/2} state by {sup 4}I{sub 1 1/2} excitation around 980 nm. In both glasses, multiphonon relaxation from {sup 4}I{sub 1 3/2} is negligible up to 678 K, and the respective 300 K absolute quantum yields are {similar_to}0.9 for 0.05 mol% Er{sup 3+}-doped samples under low- power {sup 4}I{sub 1 1/2} excitation. OH{sup {minus}} impurities are able to efficiently quench {sup 4}I{sub 1 3/2} excitation. Absolute {sup 4}I{sub 1 3/2} quantum yields are used to predict an optimum Yb{sup 3+},Er{sup 3+} concentration range for sensitization. Yb{sup 3+} codotation strongly enhances pump-light absorption and increases {sup 4}I{sub 1 3/2} population by almost two orders of magnitude in some samples. Relative {sup 2}H{sub 1 1/2}/{sup 4}S{sub 3/2} upconversion luminescence intensities are shown to be a sensitive measure for the substantial internal sample heating observed in Yb{sup 3+} codoped glasses.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 01 00:00:00 EST 1996},
month = {Mon Apr 01 00:00:00 EST 1996}
}

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  • Er{sup 3+}/Yb{sup 3+} codoped transparent phosphate precursor glasses and glass ceramics have been fabricated and characterized. The formation of ErPO{sub 4} and YbPO{sub 4} nanocrystals was studied using x-ray diffraction. The intensity parameters, the spontaneous radiative transition probabilities, the branching ratios, and the radiative lifetimes of Er{sup 3+} in both glass ceramics and precursor glasses were calculated based on the Judd-Ofelt theory, and the crystallization process in the glass ceramics is confirmed by the optical parameters obtained. Under 975 nm wavelength excitation intense 1.54 {mu}m fluorescence and upconversion luminescence were observed in the glass ceramics, the quantum efficiency of themore » Er{sup 3+} {sup 4}I{sub 13/2}{yields}{sup 4}I{sub 15/2} transition is 95%, and the transition mechanisms of the upconversion luminescence are due to a two-photon process.« less
  • Lead bismuth alumina borate glasses codoped with Er{sup 3+}/Yb{sup 3+} were prepared by melt quenching technique. Optical absorption, FTIR and photoluminescence spectra of these glasses have been studied. Judd-Ofelt theory has been applied to to the f ↔ f transitions for evaluating Ω{sub 2}, Ω{sub 4} and Ω{sub 6} parameters. Radiative properties like branching ratio β{sub r} and the radiative life time τ{sub R} have been determined on the basis of Judd-Ofelt theory. Upconversion emissions have been observed under 980nm laser excitation at room temperature. Green and red up-conversion emissions are centered at 530, 550 and 656 nm corresponding tomore » {sup 2}H{sub 11/2}→{sup 4}I{sub 15/2}, {sup 4}S{sub 3/2}→{sup 4}I{sub 15/2} and {sup 4}F{sub 9/2}→{sup 4}I{sub 15/2} transitions of Er{sup 3+} respectively. The results obtained are discussed quantitatively based on the energy transfer between Yb{sup 3+} and Er{sup 3+}.« less
  • The fabrication and optical performance of planar optical waveguide amplifiers, comprising of deposited Er{sup 3+}-doped soda-lime glass cores on silicon optical bench platforms is documented in this paper. The results are encouraging for practical device applications. A laser device has also been characterized. Its modest performance highlights some of the differences between amplifiers and lasers.
  • Er{sup 3+}/Yb{sup 3+}-codoped bismuthate glasses for developing potential upconversion lasers have been fabricated and characterized. The optimal Yb{sup 3+} doping content was investigated in the glasses with different Yb{sup 3+}-Er{sup 3+} concentration ratios and the optimal Yb{sup 3+}-Er{sup 3+} concentration ratio is 5:1. Under 975 nm excitation, intense green and red emissions centered at 525, 546 and 657 nm, corresponding to the transitions {sup 2}H{sub 11/2} {yields} {sup 4}I{sub 15/2}, {sup 4}S{sub 3/2} {yields} {sup 4}I{sub 15/2} and {sup 4}F{sub 9/2} {yields} {sup 4}I{sub 15/2}, respectively, were observed at room temperature. The quadratic dependence of the 525, 546 and 657more » nm emissions on excitation power indicates that a two-photon absorption process occurs under 975 nm excitation.« less
  • The frequency upconversion properties of Er{sup 3+}/Yb{sup 3+}-codoped heavy metal oxide lead-germanium-bismuth oxide glasses under 975 nm excitation are investigated. Intense green and red emission bands centered at 536, 556 and 672 nm, corresponding to the {sup 2}H{sub 11/2} {sup {yields}} {sup 4}I{sub 15/2}, {sup 4}S{sub 3/2} {sup {yields}} {sup 4}I{sub 15/2} and {sup 4}F{sub 9/2} {sup {yields}} {sup 4}I{sub 15/2} transitions of Er{sup 3+}, respectively, were simultaneously observed at room temperature. The influences of PbO on upconversion intensity for the green (536 and 556 nm) and red (672 nm) emissions were compared and discussed. The optimized rare earth dopingmore » ratio of Er{sup 3+} and Yb{sup 3+} is 1:5 for these glasses, which results in the stronger upconversion fluorescence intensities. The dependence of intensities of upconversion emission on excitation power and possible upconversion mechanisms were evaluated and analyzed. The structure of glass has been investigated by means of infrared (IR) spectral analysis. The results indicate that the Er{sup 3+}/Yb{sup 3+}-codoped heavy metal oxide lead-germanium-bismuth oxide glasses may be a potential materials for developing upconversion fiber optic devices.« less