Polarization-based reconfigurable optical interconnects in free-space optical processing modules

Goulet, Alain; Nieuborg, Nancy; Thienpont, Hugo; Kirk, Andrew G.; Koczyk, P.; Heremans, Paul; Kuijk, Maarten; Tandt, Cathleen De; Ranson, Willy; Vounckx, Roger; Veretennicoff, Irina

doi:10.1109/68.661412

Cited by 8 publications

(2 citation statements)

References 7 publications

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“…Polarization-selective, or anisotropic, diffractive optical elements (ADOEs) implementing calcite in combination with an index-matching polymer have proven to have several advantages over LiNbO3 [41. Recently we implemented ADOEs in a free-space reconfigurable optical interconnect using liquid crystal retarders (LCR) to control polarization of light [5]. The reconfiguration rate in this case was limited by the switching speed of the LCR, which is 20Hz in the case of a nematic LCR, and 20kHz in the case of a ferroelectric LCR.…”

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confidence: 98%

Free-space reconfigurable optical interconnection based on polarization-switching VCSELs and polarization-selective diffractive optical elements

et al. 1998

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I. INTRODUCTIONThe reconfigurability of optical interconnects is often translated in polarization-selectivity. To this aim, polarizing highspatial frequency gratings in GaAs [1], polarizing holographic optical elements in DCG [21, polarization-selective computer-generated holograms in LiNbO3 [3] and polarization-selective diffractive optical elements in calcite [41 have been developed. Polarization-selective, or anisotropic, diffractive optical elements (ADOEs) implementing calcite in combination with an index-matching polymer have proven to have several advantages over LiNbO3 [41. Recently we implemented ADOEs in a free-space reconfigurable optical interconnect using liquid crystal retarders (LCR) to control polarization of light [5]. The reconfiguration rate in this case was limited by the switching speed of the LCR, which is 20Hz in the case of a nematic LCR, and 20kHz in the case of a ferroelectric LCR. Very recently electrically controlled polarization switching in VCSEL's has been demonstrated up to 50MHz [6,7] with a polarization contrast ratio of 20:1 [7]. Here we report on the implementation of these polarization-switching VCSEL's in a reconfigurable interconnect demonstrator based on ADOEs. We present reconfigurable interconnects at 30MHz, and we demonstrate the proof-ofprinciple of a data transparent reconfigurable interconnection scheme with a bit rate of 1MHz and a reconfiguration rate of 40kHz. Both the bit rate and the reconfiguration rate are limited by the available electronic source of modulation.

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confidence: 98%

Free-space reconfigurable optical interconnection based on polarization-switching VCSELs and polarization-selective diffractive optical elements

et al. 1998

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“…In addition, the attraction of combining detection and emission functions in a single element is that the consumed semiconductor area remains small, allowing high packing density of such devices. [4][5][6] However, relatively slow switching speed is the major limiting factor for optical thyristors. In the on-state, the center n-and p-layers of the device contain a high number of free holes and electrons, whereas in the off-state these numbers are relatively low.…”

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Reverse-biased characteristics of GaAs/AlGaAs depleted optical thyristor with low depletion voltage

et al. 2003

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For the faster switching speed and the lower power consumption, we optimized the structure of a fully depleted optical thyristor (DOT) by the depletion of charge at the lower negative voltage. The fabricated optical thyristor shows sufficient nonlinear s-shape I-V characteristics with the switching voltage of 2.85 V and the complete depletion voltage of -8.73 V. In this paper, using a finite difference method (FDM), we calculate the effects of parameters such as doping concentration and thickness of each layer to determine the optimized structure in the view of the fast and low-power-consuming operation.

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Data transparent reconfigurable optical interconnections based on polarization-switching VCSELs and polarization-selective diffractive optical elements

Nieubor

Panajotov

Goulet

et al. 1998

IEEE Photon. Technol. Lett.

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Polarization-based reconfigurable optical interconnects in free-space optical processing modules

Cited by 8 publications

References 7 publications

Free-space reconfigurable optical interconnection based on polarization-switching VCSELs and polarization-selective diffractive optical elements

Free-space reconfigurable optical interconnection based on polarization-switching VCSELs and polarization-selective diffractive optical elements

Reverse-biased characteristics of GaAs/AlGaAs depleted optical thyristor with low depletion voltage

Data transparent reconfigurable optical interconnections based on polarization-switching VCSELs and polarization-selective diffractive optical elements

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