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Wavelength Tunable Laser Using an Interleaved Rear Reflector

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4 Author(s)
Engelstaedter, J.P. ; Tyndall Nat. Inst., Univ. Coll. Cork, Cork, Ireland ; Roycroft, B. ; Peters, F.H. ; Corbett, B.

A novel integrated reflector concept for use in widely tunable semiconductor lasers is introduced. Two concatenated Fabry-Perot cavities with low partial reflections and different cavity lengths are interleaved to realize a wavelength-selective reflective element. Differential current injection in the interleaved cavities is used to tune the reflection peak. The reflector is integrated in an all-active multisection device. The laser tunes across 37 wavelength channels on a 100-GHz grid over a wavelength span of 30 nm. The linewidth of each mode is <7 MHz while the power deviation is <6 dB.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 1 )