Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Edge Couplers with relaxed Alignment Tolerance for Pick-and-Place Hybrid
  Integration of III-V Lasers with SOI Waveguides   We report on two edge-coupling and power splitting devices for hybrid
integration of III-V lasers with sub-micrometric silicon-on-insulator (SOI)
waveguides. The proposed devices relax the horizontal alignment tolerances
required to achieve high coupling efficiencies and are suitable for passively
aligned assembly with pick-and-place tools. Light is coupled to two on-chip
single mode SOI waveguides with almost identical power coupling efficiency, but
with a varying relative phase accommodating the lateral misalignment between
the laser diode and the coupling devices, and is suitable for the
implementation of parallel optics transmitters. Experimental characterization
with both a lensed fiber and a Fabry-P\'erot semiconductor laser diode has been
performed. Excess insertion losses (in addition to the 3 dB splitting) taken as
the worst case over both waveguides of respectively 2 dB and 3.1 dB, as well as
excellent 1 dB horizontal loss misalignment ranges of respectively 2.8 um and
3.8 um (worst case over both in-plane axes) have been measured for the two
devices. Back-reflections to the laser are below -20 dB for both devices within
the 1 dB misalignment range. Devices were fabricated with 193 nm DUV optical
lithography and are compatible with mass-manufacturing with mainstream CMOS
technology.

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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org