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arXiv · 1902.06544

Integrated frequency comb laser with narrow intrinsic optical linewidth based on a dielectric waveguide feedback circuit

Jesse Mak·Albert van Rees·Youwen Fan·Edwin J. Klein·Dimitri Geskus·Peter J. M. van der Slot·Klaus. -J. Boller
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Abstract

We present an integrated hybrid semiconductor-dielectric (InP-Si$_3$N$_4$) waveguide laser that generates frequency combs at a wavelength around 1.5 $\mu$m with a record-low intrinsic optical linewidth of 34 kHz. This is achieved by extending the cavity photon lifetime using a low-loss dielectric waveguide circuit. In our experimental demonstration, the on-chip, effective optical path length of the laser cavity is extended to 6 cm. The resulting linewidth narrowing shows the high potential of on-chip, highly coherent frequency combs with direct electrical pumping, based on hybrid and heterogeneous integrated circuits making use of low-loss dielectric waveguides.

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Jesse Mak, Albert van Rees, Youwen Fan, Edwin J. Klein, Dimitri Geskus, Peter J. M. van der Slot, Klaus. -J. Boller. 2019-02-18. Integrated frequency comb laser with narrow intrinsic optical linewidth based on a dielectric waveguide feedback circuit. https://doi.org/10.1364/oe.27.013307

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