23 May 2007 Control over spectral content via differential pumping of a monolithic passively mode-locked quantum dot laser
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Abstract
A monolithic two-section quantum dot semiconductor laser is differentially pumped to form non-uniform current injection in the gain region. We show that the nature of the spectral content in the output signal is affected by this differential pumping; despite the fact that the separately pumped gain regions are not electrically isolated in this device. Both negative (red-shift) and positive (blue-shift) spectral chirps were observed during mode-locked operation. It is also demonstrated that mode locked operation is achieved with a much larger set of injection current / absorber bias voltage pairs than was previously possible with single-pad current injection.
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K. Brown, B. Wysocki, M. Fanto, J. Malowicki, V. Kovanis, L. Lester, "Control over spectral content via differential pumping of a monolithic passively mode-locked quantum dot laser", Proc. SPIE 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III, 65720A (23 May 2007); doi: 10.1117/12.722421; https://doi.org/10.1117/12.722421
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