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Optical Engineering

Laser micro welding for fiber-chip coupling modules with tapered standard monomofe fiber ends for optical communication systems
Author(s): Ulrich H.P. Fischer; O. Krips; E. Mueller; A. Jacob
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Paper Abstract

We design a laser welding machine for fabricating butterfly (BFY) modules with an optical coupling setup that is well suited for rapid prototyping and small-scale production of InP and GaAs-based waveguide-fed photonic components such as diode lasers, semiconductor amplifiers, optical modulators, and optoelectrical ICs (OEICs). The light of these devices is transferred very efficiently into single-mode fibers using integrated tapered lensed ends. In our setup the mechanical adjustment of the fiber-chip coupling is done semiautomatically by a newly designed coupling machine while laser welding performs the fixing of the fiber-chip connection. We found a yield of 47% within a shift of 1.0 μm at the initial welding spot. With additional weld adjustment, it was possible to extend the yield of 67%. We introduce, to our knowledge for the first time, an adjustable welding technique, which we call "strain-reducing" welding, which has several benefits in comparison to the well-known "laser hammering" technique.

Paper Details

Date Published: 1 December 2002
PDF: 9 pages
Opt. Eng. 41(12) doi: 10.1117/1.1517577
Published in: Optical Engineering Volume 41, Issue 12
Show Author Affiliations
Ulrich H.P. Fischer, Heinrich-Hertz-Institut fuer Nachrichtentechnik Berlin GmbH (Germany)
O. Krips, Heinrich-Hertz-Institut fuer Nachrichtentechnik Berlin GmbH (Germany)
E. Mueller, Heinrich-Hertz-Institut Fuer Nachrichtentechnik Berlin GmbH (Germany)
A. Jacob, Heinrich-Hertz-Institut fuer Nachrichtentechnik Berlin GmbH (Germany)


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