Optical losses and gain in silicon-rich silica waveguides containing Er ions

Navarro-Urriós, D.; Melchiorri, M.; Daldosso, N.; Pavesi, L.; Garcı́a, C.; Pellegrino, P.; Garrido, B.; Pucker, G.; Gourbilleau, Fabrice; Rizk, R.

doi:10.1016/j.jlumin.2006.08.002

Cited by 29 publications

(14 citation statements)

References 22 publications

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“…The Er concentration value of 6 Â 10 20 cm 3 is similar to that obtained by other incorporation methods in other matrixes such as silicon-rich silica waveguides doped containing Er in a concentration of about 4-5.4 Â 10 20 cm 3 [24] or in phosphosilicate glasses which are doped with Er concentration of 5.3 Â 10 20 cm 3 [25].…”

Section: Determination Of Doping Conditionssupporting

confidence: 82%

Er3+ Doping conditions of planar porous silicon waveguides

Najar¹,

Lorrain²,

Ajlani³

et al. 2009

Applied Surface Science

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Section: Determination Of Doping Conditionssupporting

confidence: 82%

Er3+ Doping conditions of planar porous silicon waveguides

Najar¹,

Lorrain²,

Ajlani³

et al. 2009

Applied Surface Science

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“…The optical gain, using a stimulation probe about 600 nm, can be obtained evaluating the signal enhancement (SE) when the probe beam passes through the crystal. Therefore, it is defined by [16,22]:…”

Section: Optical Amplificationmentioning

confidence: 99%

Effect of substitution of lutetium by gadolinium on emission characteristics of (Lu_xGd_1-x)_2SiO_5: Sm^3+ single crystals

Ryba‐Romanowski¹,

Strzęp²,

Lisiecki³

et al. 2014

Opt. Mater. Express

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Single crystals of (Lu x Gd 1-x ) 2 SiO 5 :Sm (0.5 at%) with x = 0.19 (81% Gd3+) and x = 0.11 (89% Gd 3+ ) belonging respectively to the C2/c and P2 1 /c space groups were grown by the Czochralski method under nitrogen atmosphere. Detailed investigation of their spectroscopic properties were performed with the aim of understanding the effect of structural modification on emission characteristics of incorporated Sm 3+ ions with a special attention directed to a laser potential associated with yellow emission line. It was inferred from low temperature optical spectra that almost all emission intensity in the host with C2/c symmetry comes from one of two available Sm 3+ sites, whereas two Sm 3+ sites contribute to emission in the host with P2 1 /c symmetry. Excitation spectra of Sm 3+ emission recorded in the VUV-UV region between 100 nm and 350 nm made it possible to locate the energy of CT transition at about 6.11 eV and to assess the low energy limit for the 4f 5 → 4f 4 5d 1 transitions of Sm 3+ to about 6.81 eV. It implies that in the two systems studied these energies are advantageously high thereby preventing the contribution of intense allowed transitions to an adverse excited state absorption of both blue pump radiation and yellow emission. Experiments of optical amplification of yellow emission were performed employing a pump-and-probe technique in order to verify this implication. It was found that for a LGSO:Sm 3+ crystal having the C2/c symmetry an increase of the pump power density from 20 mJ/cm 2 to 50 mJ/cm 2 at a constant power probe density of 150 μW/cm 2 brings about a positive gain growing from about 0.25 to 2 [cm −1 ]. In the same conditions a maximum gain value of 1 cm −1 was measured for LGSO:Sm 3+ crystal having the P2 1 /c symmetry. It was concluded that the former system is promising for the design of all-solid-state yellow lasers. 85-93 (2012). 9. C. Li, R. Moncorge, J. C. Souriau, C. Borel, and Ch. Wyon, "Efficient 2.05 μm room temperature Y 2 SiO 5 :Tm 3+ cw laser," Opt. Commun. 101(5-6), 356-360 (1993). 10. C. Yan, G. Zhao, L. Su, X. Xu, L. Hang, and J. Xu, ""Growth and spectroscopic characteristics of Yb:GSO single crystal," J. Phys. Condens. Matter 18(4), 1325-1333 (2006). 11. M. Jacquemet, C. Jacquemet, N. Janel, F. Druon, F. Balembois, P. Georges, J. Petit, B. Viana, D. Vivien, and B.

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“…Even if Erbium Doped Silica Fiber Amplifiers (EDFA) represent a well estabilished technology, there is still room for improvement, on one hand by reducing the cost of the expensive lasers needed to pump the sharp, low absorbing (σ abs (@1535nm) ~ 5 x 10 -21 cm 2 ) Er transitions [2], and on the other by improving the packaging. The inclusion of broadband high-absorbing sensitizers as Si nanocrystals/nanoclusters (Si-nc) seems a promising route to realize an Erbium Doped Waveguide Amplifier (EDWA) where the pump laser can be substituted by an high power LEDs or, even, by an electrical excitation circuit [3].…”

Section: Introductionmentioning

confidence: 99%

Further improvements in Er³⁺coupled to Si nanoclusters rib waveguides

et al. 2008

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The use of broadband efficient sensitizers for Er 3+ ions relaxes the expensive conditions needed for the pump source and raises the performances of the optical amplifier. Within this context Si nanoclusters (Si-nc) in silica matrices have revealed as optimum sensitizers and open the route towards electrically pumped optical amplifiers. Up to date two have been the main limiting issues for achieving absolute optical gain, the first one is the low quantity of erbium efficiently coupled to the Si-nc while the second is the carrier absorption mechanism (CA) within the Si-nc, which generates additional losses instead of providing amplification.In this work we will present a detailed study of the optical properties of a set of samples prepared by confocal reactive magnetron co-sputtering of pure SiO 2 and Er 2 O 3 targets. The material has been optimised in terms of the increasing of Er 3+ -related PL intensity and lifetime as well as the decreasing down to 3 dB/cm of the propagation losses in the ribloaded waveguides outside the absorption peak of erbium. Our signal enhancement results show that we have been able to reduce the CA losses to less than 0.2 dB/cm at pump fluxes as high as 10 20 ph/cm 2 s. Around 25% of the optically active erbium population has been inverted through indirect excitation (pumping with a 476nm laser line), leading to internal gain coefficients of more than 1 dB/cm.

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Optical losses and gain in silicon-rich silica waveguides containing Er ions

Cited by 29 publications

References 22 publications

Er3+ Doping conditions of planar porous silicon waveguides

Er3+ Doping conditions of planar porous silicon waveguides

Effect of substitution of lutetium by gadolinium on emission characteristics of (Lu_xGd_1-x)_2SiO_5: Sm^3+ single crystals

Further improvements in Er³⁺coupled to Si nanoclusters rib waveguides

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Optical losses and gain in silicon-rich silica waveguides containing Er ions

Cited by 29 publications

References 22 publications

Er3+ Doping conditions of planar porous silicon waveguides

Er3+ Doping conditions of planar porous silicon waveguides

Effect of substitution of lutetium by gadolinium on emission characteristics of (Lu_xGd_1-x)_2SiO_5: Sm^3+ single crystals

Further improvements in Er3+coupled to Si nanoclusters rib waveguides

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Further improvements in Er³⁺coupled to Si nanoclusters rib waveguides