George Oulundsen

End-to-End Multicore Multimode Fiber Optic Link Operating up to 120 Gb/s

A full multicore fiber optic link is demonstrated, transmitting greater than 100 Gb/s through a single strand of multimode fiber for the first time. The fiber, which consists of seven graded-index multimode cores, is used to transmit up to 120 Gb/s over 100 m using a custom multicore-fiber interfacing transmitter and receiver. 2-D arrays of vertical-cavity surface-emitting lasers (VCSELs) and vertically illuminated photodiodes (PDs) are fabricated with a geometry corresponding to the outer six cores of the seven-core fiber, which is arranged in a hexagonal pattern. Both flip-chip and wire-bonding technologies are used to package the VCSEL and PD chips with multichannel transmitter and receiver integrated circuits. Amplitude and timing margins of the end-to-end signals are analyzed through bit-error-rate (BER) measurements. The effects of electrical and optical crosstalk are shown to result in negligible degradation to the BER performance.

70-Gb/s Multicore Multimode Fiber Transmissions for Optical Data Links

This letter describes a novel structure and crosstalk characteristics of a graded-index multicore fiber with seven cores arranged in a hexagonal array. A total of 70 Gb/s (7 × 10 Gb/s) is transmitted over a single 100-m seven-core multimode fiber (MMF) using tapered multicore fiber connectors and 850-nm vertical-cavity surface-emitting lasers, demonstrating high-speed multicore MMF transmissions for parallel optical data links.

7×10-Gb/s multicore multimode fiber transmissions for parallel optical data links

This paper describes a novel structure of a graded-index multicore fiber with seven cores arranged in a hexagonal array. Total 70-Gb/s (7×10-Gb/s) is transmitted over a single 100-meter seven-core multimode fiber using tapered multicore fiber connectors and 850nm VCSELs.

Advanced multimode fiber for high-speed short-reach interconnect

In this paper, we describe the characteristics of advanced MMF, how it is specified, how it is manufactured, and update its application in IEEE P802.3ba 40G/100G SR4/10 standards development.

Optical fiber designs for beam shaping

A large number of power delivery applications for optical fibers require beams with very specific output intensity profiles; in particular applications that require a focused high intensity beam typically image the near field (NF) intensity distribution at the exit surface of an optical fiber. In this work we discuss optical fiber designs that shape the output beam profile to more closely correspond to what is required in many real world industrial applications. Specifically we present results demonstrating the ability to transform Gaussian beams to shapes required for industrial applications and how that relates to system parameters such as beam product parameter (BPP) values. We report on the how different waveguide structures perform in the NF and show results on how to achieve flat-top with circular outputs.

Specialty high bandwidth multimode fiber for optical interconnection

In this paper, we review high bandwidth multimode fiber and their role in upgrade path of optical interconnection to 40G and 100G in data centers and high performance computing.