In the filtered optical feedback (FOF) scheme a part of the emission of the laser is spectrally filtered, for example by a Fabry-P´erot filter, and than fed back into the laser. If a semiconductor laser is subject to such delayed FOF qualitative different types of oscillations are possible: the well known relaxation oscillations and, more remarkably, frequency oscillations. We explain how the continuous wave operation of the FOF laser — the external filtered modes — lose their stability and the different types of oscillations arise due to the presence of the filter. This study is restricted to the case of a narrow filter. This means that there are only a few external filtered modes within the width of the filter, so that the influence of the feedback phase can be studied explicitly.
Translated title of the contribution | Dynamics of semiconductor lasers with filtered optical feedback |
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Original language | English |
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Title of host publication | SPIE 2006 |
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Volume | 6184 |
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DOIs | |
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Publication status | Published - Apr 2006 |
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Name and Venue of Event: Semiconductor Lasers and Laser Dynamics II
Other: http://rose.bris.ac.uk/dspace/handle/1983/423