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Proceedings Paper

Design Of A Low-Cost 1.3µm Laser Package For Local Loop Applications Using Graded-Index Lenses
Author(s): L. A. Reith; J. W. Mann; P. W. Shumate
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Paper Abstract

A 1.3μm connectorized laser package has been proposed which uses a low-cost Compact Disk package coupled to single-mode fiber using two graded-index lenses. The threaded laser module consists of the Compact Disk package mounted directly behind a graded-index lens. This lens serves to collimate the laser radiation. The laser module can then be connected to single-mode fiber by means of a single-mode connector with a second graded-index lens permanently attached to the connector end. The second lens serves to focus the laser radiation onto the fiber core. Alignment sensitivity at the lens-lens interface is reduced, resulting in a highly tolerant connection. The decrease in lateral alignment sensitivity is achieved by trading it off for some unneeded angular tolerance, and some loss of coupling efficiency. In this paper, we will present results of calculations showing how to determine given coupling efficiency/sensitivity trade-offs by making appropriate lens selection. Graded-index lenses are identified and selected on the basis of pitch, which is simply proportional to the length of the lens. In addition, we note that the effective angular alignment at the lens-lens interface can be quite sensitive, depending on the fiber connector used. We propose a means of avoiding this difficulty, using a modified biconic connector design.

Paper Details

Date Published: 1 January 1987
PDF: 9 pages
Proc. SPIE 0836, Optoelectronic Materials, Devices, Packaging, and Interconnects, (1 January 1987); doi: 10.1117/12.967548
Show Author Affiliations
L. A. Reith, Bell Communications Research (United States)
J. W. Mann, Bell Communications Research (United States)
P. W. Shumate, Bell Communications Research (United States)

Published in SPIE Proceedings Vol. 0836:
Optoelectronic Materials, Devices, Packaging, and Interconnects
Theodore E. Batchman; Richard Franklin Carson; Robert L. Galawa; Henry J. Wojtunik, Editor(s)

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