A giant controllable gap in the optical spectrum of a semiconductor laser subject to intense feedback with rotated polarization

Details A giant controllable gap in the optical spectrum of a semiconductor laser subject to intense feedback with rotated polarization A giant controllable gap in the optical spectrum of a semiconductor laser subject to intense feedback with rotated polarization

2007-10-09

arxiv.org/abs/0710.1704v1

Physics

Optics

4 pages, 4 figures

Scientific paper

A semiconductor laser subject to delayed optical feedback is investigated in the limit of extremely intense feedback power. In a range of feedback polarization rotation angles the emission spectra of the laser reveal a giant gap with width of more than a terahertz. The position of the gap and its width are shown to be regulated by means of feedback polarization rotation angle. We demonstrate that a theoretical approach, based on carrier density grating induced potential, explains our experimental results.

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