Real-time frequency dynamics and high-resolution spectra of a semiconductor laser with delayed feedback

被引：27
|
作者：
Brunner, Daniel [1 ]
Porte, Xavier [1 ]
Soriano, Miguel C. [1 ]
Fischer, Ingo [1 ]
机构：
[1] UIB, CSIC, IFISC, E-07122 Palma de Mallorca, Spain
来源：
SCIENTIFIC REPORTS | 2012年 / 2卷
关键词：
COHERENCE COLLAPSE; CHAOTIC ITINERANCY; FLUCTUATIONS;
D O I：
10.1038/srep00732
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The unstable emission of semiconductor lasers due to delayed optical feedback is characterized by combined intensity and frequency dynamics. Nevertheless, real-time experimental investigations have so far been restricted to measurements of intensity dynamics only. Detailed analysis and comparison with numerical models, therefore, have suffered from limited experimental information. Here, we report the simultaneous determination of the lasers optical emission intensity and emission frequency with high temporal resolution. The frequency dynamics is made accessible using a heterodyne detection scheme, in which a beat signal between the delayed feedback laser and a reference laser is generated. Our experiment provides insight into the overall spectral drift on nanosecond timescales, the spectral distribution of the unstable pulsations and the role of the individual external cavity modes. This opens new perspectives for the analysis, understanding and functional utilization of delayed feedback semiconductor lasers.
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页数：5
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