The linewidth enhancement factor (LEF) and nonlinear gain coefficient of an InAs/AlGaInAs quantum dot (QD) laser
are measured using an injection locking technique. The nonlinear gain coefficient was found by curve-fitting the
measured LEF as a linear function of the output power. The LEF of the InAs/AlGaInAs quantum dot laser was
measured to be 1.2 to 8.6 at output powers from 2 to 10.2 mW, leading to a corresponding nonlinear gain coefficient of
1.4 x 10-14 cm3. This value for the nonlinear gain coefficient is three orders of magnitude higher than the typical
quantum well nonlinear gain coefficient of 10-17 cm3. Consequently we expect that the dynamics under optical injection
and external feedback of this type of quantum dot laser will be dramatically different than in quantum well lasers,
suggesting that a careful re-examination of the dynamics of this type of laser is needed.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.