Steven Eugene Golowich

Modeling and simulation of next-generation multimode fiber links

This paper describes an advanced multimode-fiber-link model that was used to aid the development of Telecommunication Industry Association standard specifications for a next-generation 50-/spl mu/m-core laser-optimized multimode fiber. The multimode-link model takes into account the interactions 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.

Quantitative estimates of mode coupling and differential modal attenuation in perfluorinated graded-index plastic optical fiber

The performance of plastic optical fiber is greatly influenced by the related but distinct effects of mode coupling and differential modal attenuation (DMA). We establish a method for estimating the matrix that governs both of these effects and allows us to distinguish the two. We obtain partial quantitative estimates of this matrix for a particular graded-index plastic optical fiber (GI-POF). The sample we studied exhibited strong but incomplete mode coupling over 100-m lengths, while DMA was largely limited to a centerline defect. We show that much of the loss of the fiber can be attributed to mode coupling between mode groups with similar effective indexes.

Modeling and simulations for 10 Gb multimode optical fiber link component specifications

We present simulations of a next-generation 10Gb multimode fiber link including effects of transmitters, fibers, and connections. The results support transmitter and fiber specifications proposed in the TIA FO2.2.1 working group.

A new modal power distribution measurement for high-speed laser transmitters

We propose and demonstrate a new technique for measuring the modal power distribution of light launched into a multimode fiber. When applied to high-speed lasers our method is much simpler than existing ones.