March 13, 2017

Hybrid integrated wavelength and reflectivity tunable III-V/Silicon transmitter

  • Bolle C.
  • Brenot R.
  • Chang C.
  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Earnshaw M.
  • Eggleston M.
  • Kaneda N.
  • Maho A.
  • Melikyan A.

We demonstrate a novel wavelength-tunable hybrid silicon-based transmitter with integrated reflectivity tunable mirror. First, designs of a novel hybrid laser based on reflective symmetric and asymmetric Mach-Zehnder interferometer based mirrors are studied with single and double ring intra-cavity filters respectively. Asymmetric configuration is used in order to increase the tuning range of a single ring laser by more than 90 %. Furthermore, adjustment of the mirror reflectivity allows for control of laser characteristics such as threshold current, wall-plug efficiency, output power and linewidth. Finally, an ultra-compact hybrid tunable III-V/Si transmitter with more than 28 nm tuning range is then demonstrated based on such hybrid cavity design and one ring modulator. We successfully achieved modulation up to 40 Gbit/s and transmission over 20 (100) km at 25 (10) Gbit/s.

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