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1242 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 21, NO. 5, MAY 2003 Modeling and Simulation of Next-Generation Multimode Fiber Links Petar Pepeljugoski , Senior Member, IEEE , Steven E. Golowich , Member, IEEE , A. John Ritger, Paul Kolesar , Member, IEEE , and Aleksandar Risteski , Member, IEEE Abstract— This paper describes an advanced multi- mode-fiber-link model that was used to aid the development of Telecommunication Industry Association standard specifica- tions for a next-generation 50- m-core laser-optimized multimode fiber. The multimode-link model takes into account the interac- tions of the laser, the transmitter optical subassembly, and the fiber, as well as effects of connections and the receiver preamplifier. We present models for each of these components. Based on these models, we also develop an efficient and simple formalism for the calculation of the fiber transfer function and the signal at the link output in any link configuration. We demonstrate how the model may be used to develop specifications on transmitters and fibers that guarantee any desired level of performance. Index Terms— Modeling, mode delays, multimode fiber links, op- tical communications, 10 Gigabit Ethernet. I. I NTRODUCTION T HIS PAPER is the third and last in a set of three papers doc- umenting recent multimode-fiber standards development in the Telecommunications Industry Association (TIA). It pro- vides an in-depth description of the theoretical model used for the multimode-fiber standards development. The first paper [1] focuses on the development of a 500-m 1-Gb/s network solution using a 62.5- m fiber and short-wavelength (830–860 nm) laser transceivers. The second paper [2] describes the development of a more generalized approach and focuses on a 300-m 10-Gb/s solution using a 50- m fiber. The IEEE 802.3ae Standard, also known as 10 Gigabit Eth- ernet (10 GbE), was approved for publication in June 2002. As one of the Physical Media Dependent Layers, it includes a short wavelength (850-nm) link over a multimode fiber for lengths up to 300 m. This is an attractive choice for the physical layer due to both the low cost of vertical-cavity surface-emitting laser (VCSEL)-based transceivers, which do not require accu- rate alignment into multimode fibers, as well as legacy support issues. Although a standard for a laser-optimized multimode Manuscript received November 16, 2002; revised February 19, 2003. P. Pepeljugoski is with the IBM T. J. Watson Research Center, Yorktown Heights, NY 10598 USA (e-mail: [email protected]). S. E. Golowich is with Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. A. J. Ritger is with the OFS Optical Fiber Division, Norcross, GA 30071 USA. P. Kolesar is with the Connectivity Solutions Division, Avaya Laboratories, Richardson, TX 75082 USA. A. Risteski is with the St. Cyril and Methodius University, 1000 Skopje, Macedonia.
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