Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer

B.I. Akça, C.R. Doerr, G. Sengo, Kerstin Worhoff, Markus Pollnau, R.M. de Ridder

    Research output: Contribution to journalArticleAcademicpeer-review

    18 Citations (Scopus)
    187 Downloads (Pure)

    Abstract

    We present a new synchronized design for flattening the passband of an arrayed-waveguide grating (AWG) over a broad wavelength range of 90 nm. A wavelength-insensitive 3-dB balanced coupler is designed to be used in duplicate in a Mach-Zehnder interferometer (MZI); the phase deviation created by one of the balanced couplers is cancelled by flipping the other coupler around. This MZI is arranged in tandem with the AWG such that the output signal of the MZI is the input signal of the AWG. We demonstrate a 5-channel, 18-nm-spacing AWG with a 0.5-dB bandwidth of 12 nm over a 90-nm spectral range. A low-loss cascaded AWG system is demonstrated by using the MZI-synchronized flat-top AWG as a primary filter.
    Original languageEnglish
    Pages (from-to)18313-18318
    Number of pages6
    JournalOptics express
    Volume20
    Issue number16
    DOIs
    Publication statusPublished - 25 Jul 2012

    Keywords

    • IOMS-PIT: PHOTONICS INTEGRATION TECHNOLOGY
    • Flat-top arrayed waveguide grating
    • Integrated spectrometer
    • Broad-band couplers

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