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Proceedings Paper

New method of producing a uniformly over-filling launch distribution for multimode bandwidth measurements
Author(s): Walter M. Burchanowski
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Paper Abstract

A new method of pigtailing lasers produces an over-filled launch for bandwidth measurements without the use of a conventional mode-scrambler. Improvements are made over a conventional mode-scrambler system in both power coupled to the launch and improved reliability of the launched distribution. This technique utilizes a large-core/high-numerical aperture step-index multimode fiber to act on the high divergence angle of a laser diode. Within a few meters of the laser, mode power is uniformly distributed over more than 95% of the core diameter and fills 90% of the numerical aperture. This distribution then is transported, unchanged, to the fiber under test at the bandwidth launch. The fiber can be selected such that it efficiently over-fills the fiber under test, while not wasting power by launching into the cladding.

Paper Details

Date Published: 1 February 1992
PDF: 4 pages
Proc. SPIE 1580, Fiber Optic Components and Reliability, (1 February 1992); doi: 10.1117/12.135398
Show Author Affiliations
Walter M. Burchanowski, Corning Incorporated (United States)

Published in SPIE Proceedings Vol. 1580:
Fiber Optic Components and Reliability
Paul M. Kopera; Dilip K. Paul, Editor(s)

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