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Efficient coupling in integrated twin-waveguide lasers using waveguide tapers

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3 Author(s)
Studenkov, P.V. ; Dept. of Electr. Eng., Princeton Univ., NJ, USA ; Gokhale, M.R. ; Forrest, S.R.

We demonstrate a 1.55-μm wavelength, InGaAsP-InP, twin-waveguide (TG) laser integrated with passive ridge waveguides using low-loss taper couplers. The lateral taper on the laser waveguide induces efficient resonant coupling of light between the active and passive layers. The device is fabricated using low-cost conventional photolithography and reactive ion etching of a TG structure grown by gas-source molecular beam epitaxy. This structure is suitable for integrating a variety of photonic devices without requiring epitaxial regrowth.

Published in:

Photonics Technology Letters, IEEE  (Volume:11 ,  Issue: 9 )