Monolithically integrated widely tunable laser source operating at 2 μm
Sylwester Latkowski (Eindhoven University of Technology)
Andreas Hänsel (ImPhys/Optics)
Petrus J. Van Veldhoven (Eindhoven University of Technology)
D. D’Agostino (Eindhoven University of Technology)
H. Rabbani-Haghighi (Eindhoven University of Technology)
B. Docter (EFFECT Photonics B.V.)
N Bhattacharya (ImPhys/Optics)
P. J A Thijs (Eindhoven University of Technology)
H. P M M Ambrosius (Eindhoven University of Technology)
M. K. Smit (Eindhoven University of Technology)
E.A.J.M. Bente (Eindhoven University of Technology)
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Abstract
We present a widely tunable extended cavity ring laser operating at 2 μm that is monolithically integrated on an indium phosphide substrate. The photonic integrated circuit is designed and fabricated within a multiproject wafer run using a generic integration technology platform. The laser features an intracavity tuning mechanism based on nested asymmetric Mach-Zehnder interferometers with voltage controlled electro-refractive modulators. The laser operates in a single-mode regime and is tunable over the recorded wavelength range of 31 nm, spanning from 2011 to 2042 nm. Its capability for high-resolution scanning is demonstrated in a single-line spectroscopy experiment using a carbon dioxide reference cell.