Open AccessA flat-output widely tunable laser based on parallel-ring resonator integrated with electroabsorption modulator
Author(s) -
Takehiko Segawa,
Wataru Kobayashi,
Tomonari Sato,
Shinji Matsuo,
R. Iga,
Ryo Takahashi
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.00b485
Subject(s) - materials science , extinction ratio , optics , resonator , laser , optoelectronics , wavelength , ring laser , physics
We present a novel parallel-ring-resonator tunable laser monolithically integrated with an InGaAlAs electroabsorption modulator. The fabricated tunable laser exhibits stable wavelength tuning with a step of 200 GHz over a wide tuning range of 35 nm, achieved with a single electrode control. The variation in the laser output power with wavelength tuning is less than 1 dB even at an injected tuning current of 20 mA. Clear eye openings at 25 Gbit/s with a dynamic extinction ratio of more than 10 dB are demonstrated over a wavelength range of 25.7 nm with a constant voltage swing of 2 V at 45 °C. Error-free operation is confirmed under the same operating conditions.