Enhanced modulation bandwidth of GaAlAs double heterostructure lasers in high magnetic fields: Dynamic response with quantum wire effects
- 1 December 1985
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 47 (11) , 1142-1144
- https://doi.org/10.1063/1.96356
Abstract
The modulation bandwidth of GaAlAs double heterostructure (DH) lasers in high magnetic fields is measured. We found that the modulation bandwidth is enhanced by 1.4× with a magnetic field of 20 T. This improvement is believed to result from the increase of the differential gain due to two-dimensional carrier confinement effects in the high magnetic field (quantum wire effects). A comparison of the experimental results with a theoretical analysis indicates that the intraband relaxation time τin of the measured DH laser in the range of 0.1 to 0.2 ps.Keywords
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