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Broadly Tunable Grating-Coupled External Cavity Laser With Quantum-Dot Active Region

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3 Author(s)
Lv, X.Q. ; Key Lab. of Semicond. Mater. Sci., Chinese Acad. of Sci., Beijing, China ; Jin, P. ; Wang, Z.G.

A broadly tunable and high-power grating-coupled external cavity laser with a tuning range of more than 200 nm and a ~ 200-mW maximum output power was realized, by utilizing a gain device with the chirped multiple quantum-dot (QD) active layers and bent waveguide structure. The chirped QD active medium, which consists of QD layers with InGaAs strain-reducing layers different in thickness, is beneficial to the broadening of the material gain spectrum. The bent waveguide structure and facet antireflection coating are both effective for the suppression of inner-cavity lasing under large injection current.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 24 )

Date of Publication:

Dec.15, 2010

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