Low-loss bent connections for optical switches

We present S-bent InP/InGaAsP rib waveguides used as connections for optical switches at /spl lambda/=1.5 /spl mu/m. Transitions between waveguides of different curvature and different lateral confinement are realized with adiabatic tapers. We investigated bends with radii from 200-1700 /spl mu/m an...

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Bibliographic Details
Published in:Journal of lightwave technology 1997-05, Vol.15 (5), p.833-837
Main Authors: Heinbach, M., Schienle, M., Schmid, A., Acklin, B., Muller, G.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Costs
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Indium phosphide
Integrated optics
Integrated optics. Optical fibers and wave guides
Mirrors
Optical and optoelectronic circuits
Optical devices
Optical losses
Optical polarization
Optical switches
Optical waveguides
Waveguide transitions
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Summary:We present S-bent InP/InGaAsP rib waveguides used as connections for optical switches at /spl lambda/=1.5 /spl mu/m. Transitions between waveguides of different curvature and different lateral confinement are realized with adiabatic tapers. We investigated bends with radii from 200-1700 /spl mu/m and rib widths 2.2, 3.2, and 4.2 /spl mu/m. For rib width 3.2 /spl mu/m we obtain almost for all radii extremely small quasi-polarization independent excess-losses below 0.3 dB. The waveguides are easy to fabricate and the tapered transitions are tolerant to technological variations. The performance offers the chance of low cost and simple monolithic integration of large optical switch matrices in InP/InGaAsP.
ISSN:0733-8724
1558-2213
DOI:10.1109/50.580824