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Authors: G. Roelkens, D. Van Thourhout
Title: Interfacing silicon nanophotonic integrated circuits and single-mode optical fibers with diffraction gratings
Format: Chapter Book
Publication date: 1/2011
Journal/Conference/Book: Silicon Photonics II: Components and Intergration (Topics in Applied Physics)
Volume(Issue): 119 p.71-94
DOI: 10.1007/978-3-642-10506-7_3
Citations: 2 ( - last update: 7/7/2024)
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Exploiting the high refractive index contrast achievable on the silicon-oninsulator
(SOl) material plalform enables a drastic soaling down of the footprint of
integrated optical functions. While this allows for large-scale integration of optical
functions, it severely complicates the imerfacing with a single-mode optical fiber,
due to the huge mismatch in mode size between the optical fiber and nanophotonic
silicon waveguide. 10 this chapter we elaborate on the use of diffraction gratings
to achieve an efficienl, compac~ alignment-lolerant, polarization-independent, and
broadband optical coupling. Besides using these components as an interface with an
optical fiber, its use to interface with opto-electronic components will be discussed.
Finally, an optical probe will be presented, based on a diffraction grating integrated
on the facet of a single-mode fiber. Such an optical probe allows testing of individual
components in a silicon-on-insulator nanophotonic integrated circuit.

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