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Effect of optical feedback to the ground and excited state emission of a passively mode locked quantum dot laser

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7 Author(s)
Mesaritakis, C. ; Department of Informatics and Telecommunications, National and Kapodistrian University of Athens, Panepistimiopolis Illisia, Athens 15784, Greece ; Simos, C. ; Simos, H. ; Mikroulis, S.
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We present an experimental study on the effect of optical feedback in both ground and excited emission of a GaAs quantum dot passively mode locked laser. The experimental setup consisted of a long external cavity with variable cavity length and feedback level ranging from –50 to –20dB. The obtained experimental results show dependence of the emission properties on the cavity length regarding both the ground and excited state. In addition a strong tolerance of the laser operation to feedback at the excited state operation regime is observed.

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Applied Physics Letters  (Volume:97 ,  Issue: 6 )