1 December 2002 Laser micro welding for fiber-chip coupling modules with tapered standard monomofe fiber ends for optical communication systems
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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.
© (2002) Society of Photo-Optical Instrumentation Engineers (SPIE)
Ulrich H.P. Fischer, Ulrich H.P. Fischer, O. Krips, O. Krips, E. Mueller, E. Mueller, A. Jacob, A. Jacob, } "Laser micro welding for fiber-chip coupling modules with tapered standard monomofe fiber ends for optical communication systems," Optical Engineering 41(12), (1 December 2002). https://doi.org/10.1117/1.1517577 . Submission:
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