Resonant cavity LED's optimized for coupling to polymer optical fibers

Bockstaele, Ronny; Sys, Christa; Bondelle, J.; Dhoedt, Bart; Moerman, Ingrid; Daele, Peter Van; Demeester, Piet; Baets, Roel

doi:10.1109/68.740689

Cited by 17 publications

(7 citation statements)

References 9 publications

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“…[1][2][3][4] MCLED structures consist of an active medium placed at the antinode of a low order cavity surrounded by two mirrors which can be either metallic or dielectric.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of the internal quantum efficiency of AlGaInP microcavity light-emitting diodes

Royo

Stanley

Ilegems

et al. 2002

Journal of Applied Physics

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Detailed study of external quantum efficiency ηQE is reported for AlGaInP-based microcavity light-emitting diodes (MCLEDs). Unlike conventional light-emitting diodes (LEDs) the extraction efficiency γext and far field profile depend on the linewidth of the intrinsic spontaneous emission and wavelength detuning between cavity mode and peak electroluminescence. This dependence makes it difficult to estimate the intrinsic spectrum, hence the performances of MCLEDs. By using a nondestructive deconvolution technique, the intrinsic spectra of a MCLED and a reference LED (with the same active regions) could be determined at different current densities. This allowed precise calculation of γext for both devices (values close to 11% were found for the MCLED), and hence of their apparent internal quantum efficiencies ηintapp. At 55 A/cm2, values of 90% and 40% were determined for the LED and MCLED, respectively. In order to explain this difference, we measured ηQE for devices with different sizes. From a fitting procedure based on a simple model taking into account the device size, we found that the radiative efficiencies of LEDs and MCLEDs were close to 90%. We concluded that the low ηintapp of MCLED was due to a bad current injection, and especially to electron leakage current, as confirmed by numerical simulations.

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“…[1][2][3][4] MCLED structures consist of an active medium placed at the antinode of a low order cavity surrounded by two mirrors which can be either metallic or dielectric.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of the internal quantum efficiency of AlGaInP microcavity light-emitting diodes

Royo

Stanley

Ilegems

et al. 2002

Journal of Applied Physics

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“…Obviously this is the worst class of emitters that can be used in FSOI modules. If micro-cavity LEDs would be utilized, which have a more directive emission pattern [25], the transmission efficiency of the GRIN system would be higher. In this case we expect the improvement factor, when introducing microlenses, to be smaller for an on-axis element.…”

Section: Figure 7: Transmission Efficiency Of the Hybrid System Versumentioning

confidence: 99%

Free-space optical interconnection modules for 2D photonic-VLSI circuitry based on microlenses and GRINs

et al. 2000

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In this paper we present different configurations for a compact free-space optical interconnection (FSOI) module by combining two radial gradient refractive index lenses (GRIN) and/or two arrays of refractive microlenses. Based on our findings with ray-tracing and radiometric analysis we discuss how we have selected the proper optical system configurations and how we have chosen the different design parameters to optimally accommodate different types of opto-electronic emitters such as LEDs, micro-cavity LEDs and VCSELs. We hereby focused on maximizing optical coupling efficiencies and misalignment tolerances while minimizing inter-channel cross-talk. Furthermore we discuss the experimental optical characteristics of two such prototype modules that we completed together with the first experimental results of their use in parallel data communication demonstrator systems.

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“…For these demands, high external efficiency, low temperature sensitivity, and low cost light emitting diodes (LEDs) are needed [11]. In 1946, Purcell [12] suggested that the spontaneous emission of a radiating system can be replaced by a so-called microcavity which has the dimension on the order of the emitted light wavelength.…”

Section: Introductionmentioning

confidence: 99%

Textured zinc oxide prepared by liquid phase deposition (LPD) method and its application in improvement of extraction efficiency for 650nm resonant-cavity light-emitting diode (RCLED)

Lei¹,

Ding²,

Lee³

et al. 2011

Journal of Alloys and Compounds

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Resonant cavity LED's optimized for coupling to polymer optical fibers

Cited by 17 publications

References 9 publications

Experimental determination of the internal quantum efficiency of AlGaInP microcavity light-emitting diodes

Experimental determination of the internal quantum efficiency of AlGaInP microcavity light-emitting diodes

Free-space optical interconnection modules for 2D photonic-VLSI circuitry based on microlenses and GRINs

Textured zinc oxide prepared by liquid phase deposition (LPD) method and its application in improvement of extraction efficiency for 650nm resonant-cavity light-emitting diode (RCLED)

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