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Proceedings Paper

Red and green resonant cavity LEDs for datacom applications
Author(s): Brian Corbett; Brendan J. Roycroft; Alistair Phillips; Mahbub Akhter; Pleun Maaskant; John D. Lambkin; Thomas McCormack
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Paper Abstract

We report on the development of resonant cavity LEDs (RCLEDs) for use in short distance datacommunication applications using the IEEE 1394 standard where plastic optical fibre (POF) is the physical medium. The devices are designed for 650nm and 500nm emission where POF has low attenuation. The red devices based on InGaAlP/GaAs are optimised for room temperature operation and 90μm diameter devices have a maximum coupled power to 1mm diameter POF of 1mW. At 10mA the coupled power is 0.4mW with a quantum efficiency of 2%. Current spreading is shown to be critical in optimising the output power. The devices function as resonant cavity detectors with a response FWHM of 4.2nm centred at 650nm. The blue-green RCLEDs are based on InGaN/GaN and use a hybrid metal-epitaxial mirror cavity. This wavelength is preferable for longer links. The substrate emitting devices have fibre-coupled powers of 200μW at 20mA. A datarate of 250Mb/s is measured. The resonant cavity is confirmed by angularly resolved spectral measurements. The tradeoff between green and red devices is discussed.

Paper Details

Date Published: 27 August 2003
PDF: 8 pages
Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); doi: 10.1117/12.463713
Show Author Affiliations
Brian Corbett, National Microelectronics Research Ctr. (Ireland)
Brendan J. Roycroft, National Microelectronics Research Ctr. (Ireland)
Alistair Phillips, National Microelectronics Research Ctr. (Ireland)
Mahbub Akhter, National Microelectronics Research Ctr. (Ireland)
Pleun Maaskant, National Microelectronics Research Ctr. (Ireland)
John D. Lambkin, Firecomms Ltd. (Ireland)
Thomas McCormack, Firecomms Ltd. (Ireland)

Published in SPIE Proceedings Vol. 4876:
Opto-Ireland 2002: Optics and Photonics Technologies and Applications
Vincent Toal; Norman Douglas McMillan; Gerard M. O'Connor; Eon O'Mongain; Austin F. Duke; John F. Donegan; James A. McLaughlin; Brian D. MacCraith; Werner J. Blau, Editor(s)

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