Tailoring Chirp in Spin-Lasers

Details Tailoring Chirp in Spin-Lasers Tailoring Chirp in Spin-Lasers

2012-02-21

arxiv.org/abs/1202.4706v1

Appl. Phys. Lett. 100, 121111 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1063/1.3693168

The usefulness of semiconductor lasers is often limited by the undesired frequency modulation, or chirp, a direct consequence of the intensity modulation and carrier dependence of the refractive index in the gain medium. In spin-lasers, realized by injecting, optically or electrically, spin-polarized carriers, we elucidate paths to tailoring chirp. We provide a generalized expression for chirp in spin-lasers and introduce modulation schemes that could simultaneously eliminate chirp and enhance the bandwidth, as compared to the conventional (spin-unpolarized) lasers.

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