Direct VCSEL launch into large-core multimode fiber: enhancement of the bandwidth x distance product

Barbara A. DeBaun; Petar Kiril Pepeljugoski; Jeannine M. Trewhella

doi:10.1117/12.271060

4 April 1997 Direct VCSEL launch into large-core multimode fiber: enhancement of the bandwidth x distance product

Barbara A. DeBaun, Petar Kiril Pepeljugoski, Jeannine M. Trewhella

Proceedings Volume 3003, Vertical-Cavity Surface-Emitting Lasers; (1997) https://doi.org/10.1117/12.271060
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

Traditionally, large core (greater than 100 micron) step index multimode optical fiber has occupied a reactively small niche of applications in data communications. While the large diameter of this type of fiber makes it easy to align to optoelectronic devices, its bandwidth*distance (BW*D) product is low due to modal dispersion between the large number of modes supported by a fully filled fiber. Recently, interest has been renewed in using an underfilled launch to excite 62.5 micron core graded index multimode fiber as a way to improve its bandwidth performance. With the proper launch conditions, this same effect has been measured in large core fiber. A vertical cavity surface emitting laser (VCSEL) is used to provide a low numerical aperture launch into a large core fiber, which has a relatively large numerical aperture. The laser thus underfills the modes of the fiber, and a bandwidth enhancement for the fiber is obtained. Results of experiments performed on step and graded index large core multimode fibers using a direct VCSEL launch are presented. In addition, these relaxed alignment tolerance fibers allow the utilization of very low cost cabling and connectorization procedures for parallel optical fiber cables. Data, including skew, bandwidth, and insertion loss, are presented on these cables.

Citation Download Citation

Barbara A. DeBaun, Petar Kiril Pepeljugoski, and Jeannine M. Trewhella "Direct VCSEL launch into large-core multimode fiber: enhancement of the bandwidth x distance product", Proc. SPIE 3003, Vertical-Cavity Surface-Emitting Lasers, (4 April 1997); https://doi.org/10.1117/12.271060

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