Braun, Harald and Rogowsky, Stephan and Schwarz, Ulrich T. and Brueninghoff, Stefanie and Lell, Alfred and Lutgen, Stephan and Strauss, Uwe (2009) Supermodes in Broad Ridge (Al,In)GaN Laser Diodes. IEEE JOURNAL OF QUANTUM ELECTRONICS, 45 (9). pp. 1074-1083. ISSN 0018-9197,
Full text not available from this repository. (Request a copy)Abstract
Broad area (Al,In)GaN laser diodes (LDs) are suitable for high optical output power in the near UV to blue spectral range. But for ridge widths larger than a few micrometers, the occurrence of filamentation is well known. We present experimental evidence that the single filaments tend to be phase-locked with defined phase offset and build up a so called supermode. Depending on driving current a coherent or incoherent superposition of different supermodes can be observed, which has a significant impact on the corresponding lateral far-field pattern. By a simulated reconstruction of the lateral mode profile of the laser mode propagating in free space we retrieve the field and phase distribution of the laser mode in the waveguide. In this context the coupling mechanism is discussed and the mode behavior is compared to supermodes in GaAs laser diode arrays.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM-WELL LASERS; MODE-OPERATION; INGAN LASER; FILAMENTATION; DYNAMICS; BEHAVIOR; Gallium compounds; laser modes; semiconductor lasers |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Ulrich Schwarz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Sep 2020 13:47 |
| Last Modified: | 08 Sep 2020 13:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28464 |
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