Abstract
The modal gain of an InAs/GaAs self-organized quantum dot laser is determined from a measurement of the normal incidence, interband photocurrent. The maximum modal gain of the ground state transition is shown to have a value of (7 ± 3) cm-1, considerably smaller than typical values for comparable quantum well lasers. The photocurrent technique is demonstrated to be a convenient and simple method for determining the spectral form of the gain and for comparing the modal gain of different devices. The consequences of the small modal gain for the laser characteristics are discussed.
Original language | English |
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Pages (from-to) | 615-617 |
Number of pages | 3 |
Journal | Journal of Applied Physics |
Volume | 87 |
Issue number | 1 |
DOIs | |
State | Published - 1 Jan 2000 |
Externally published | Yes |