1 May 2014 A hybrid semiconductor-glass waveguide laser
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Abstract
We report on a novel type of laser in which a semiconductor optical amplifier (SOA) receives frequency-selective feedback from a glass-waveguide circuit. The laser we present here is based on InP for operation in the 1.55 μm wavelength range. The Si3N4/SiO2 glass waveguide circuit comprises two sequential high-Q ring resonators. Adiabatic tapering is used for maximizing the feedback. The laser shows single-frequency oscillation with a record-narrow spectral linewidth of 24 kHz at an output power of 5.7 mW. The hybrid laser can be tuned over a broad range of 46.8 nm (1531 nm to 1577.8 nm). Such InP-glass hybrid lasers can be of great interest in dense wavelength division multiplexing (DWDM) and as phase reference in optical beam-forming networks (OBFN). The type of laser demonstrated here is also of general importance because it may be applied over a huge wavelength range including the visible, limited only by the transparency of glass (400 nm to 2.35 μm).
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Youwen Fan, Ruud M. Oldenbeuving, Edwin J. Klein, Chris J. Lee, Hong Song, Muhammed R. H. Khan, Herman L. Offerhaus, Peter J. M. van der Slot, Klaus-J. Boller, "A hybrid semiconductor-glass waveguide laser", Proc. SPIE 9135, Laser Sources and Applications II, 91351B (1 May 2014); doi: 10.1117/12.2054528; https://doi.org/10.1117/12.2054528
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