Analysis of hexagonal array geometry for free-space optical interconnects with improved signal-to-noise ratio

Tsai, Feng-Chuan F., O'Brien, Christopher J., Petrovic, Novak S. and Rakic, Aleksandar D. (2007) Analysis of hexagonal array geometry for free-space optical interconnects with improved signal-to-noise ratio. Applied Optics, 46 13: 2434-2442. doi:10.1364/AO.46.002434


Author Tsai, Feng-Chuan F.
O'Brien, Christopher J.
Petrovic, Novak S.
Rakic, Aleksandar D.
Title Analysis of hexagonal array geometry for free-space optical interconnects with improved signal-to-noise ratio
Journal name Applied Optics   Check publisher's open access policy
ISSN 0003-6935
Publication date 2007-05
Sub-type Article (original research)
DOI 10.1364/AO.46.002434
Volume 46
Issue 13
Start page 2434
End page 2442
Total pages 9
Editor J. Wyant
Place of publication Washington
Publisher Optical Society of America
Collection year 2008
Language eng
Subject 240401 Optics and Opto-electronic Physics
291702 Optical and Photonic Systems
671304 Data, image and text equipment
C1
Abstract The effect of transmitter and receiver array configurations on the performance of free-space optical interconnects (FSOIs) was investigated. Experimentally measured, spectrally resolved, near-field images of vertical-cavity surface-emitting laser (VCSEL) transverse modes were used as extended sources in our simulation model and combined with laser relative intensity noise and the receiver noise to determine the optimal array geometry. Our results demonstrate the importance of stray-light cross talk in both square and hexagonal configurations. By changing the array lattice geometry from square to hexagonal, we obtained an overall optical signal-to-noise ratio improvement of 3 dB. We demonstrated that the optical signal-to-noise ratio is optimal for the hexagonal channel arrangement regardless of the transverse mode structure of the VCSEL beam. We also determined the VCSEL drive current required for the best performance of the FSOI system. (c) 2007 Optical Society of America.
Keyword Optics
Surface-emitting Lasers
Vertical-cavity Lasers
Cross-talk
Photodetectors
Performance
Microlenses
Challenges
Detectors
System
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 18 Feb 2008, 17:01:14 EST