Modeling and characterization of VCSEL-based avionics full-duplex ethernet (AFDX) gigabit links

Khadijetou S. Ly; A. Rissons; E. Gambardella; D. Bajon; J.-C. Mollier

doi:10.1117/12.760050

29 January 2008 Modeling and characterization of VCSEL-based avionics full-duplex ethernet (AFDX) gigabit links

Khadijetou S. Ly, A. Rissons, E. Gambardella, D. Bajon, J.-C. Mollier

Proceedings Volume 6908, Vertical-Cavity Surface-Emitting Lasers XII; 69080J (2008) https://doi.org/10.1117/12.760050
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Low cost and intrinsic performances of 850 nm Vertical Cavity Surface Emitting Lasers (VCSELs) compared to Light Emitting Diodes make them very attractive for high speed and short distances data communication links through optical fibers. Weight saving and Electromagnetic Interference withstanding requirements have led to the need of a reliable solution to improve existing avionics high speed buses (e.g. AFDX) up to 1Gbps over 100m. To predict and optimize the performance of the link, the physical behavior of the VCSEL must be well understood. First, a theoretical study is performed through the rate equations adapted to VCSEL in large signal modulation. Averaged turn-on delays and oscillation effects are analytically computed and analyzed for different values of the on- and off state currents. This will affect the eye pattern, timing jitter and Bit Error Rate (BER) of the signal that must remain within IEEE 802.3 standard limits. In particular, the off-state current is minimized below the threshold to allow the highest possible Extinction Ratio. At this level, the spontaneous emission is dominating and leads to significant turn-on delay, turn-on jitter and bit pattern effects. Also, the transverse multimode behavior of VCSELs, caused by Spatial Hole Burning leads to some dispersion in the fiber and degradation of BER. VCSEL to Multimode Fiber coupling model is provided for prediction and optimization of modal dispersion. Lastly, turn-on delay measurements are performed on a real mock-up and results are compared with calculations.

Citation Download Citation

Khadijetou S. Ly, A. Rissons, E. Gambardella, D. Bajon, and J.-C. Mollier "Modeling and characterization of VCSEL-based avionics full-duplex ethernet (AFDX) gigabit links", Proc. SPIE 6908, Vertical-Cavity Surface-Emitting Lasers XII, 69080J (29 January 2008); https://doi.org/10.1117/12.760050

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available