| Autor: |
Hinkov, Borislav, Fuchs, Frank, Bronner, Wolfgang, Köhler, Klaus, Wagner, Joachim |
| Předmět: |
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| Zdroj: |
IEEE Journal of Quantum Electronics; Nov/Dec2008, Vol. 44 Issue 11/12, p1124-1128, 5p, 6 Black and White Photographs, 5 Graphs |
| Abstrakt: |
We report large current- and temperature-induced beam-steering effects, observed in the far-field distribution of InP-based quantum-cascade lasers emitting around 7.8-μm wave-length operated in pulsed mode. Changing the temperature within a narrow range of ∼ 10°C around room-temperature leads to a change in the direction of the output beam, as given by the central lobe in the far-field intensity distribution, from +11° to -13° as measured relative to the resonator axis. This beam steering effect is linked to changes in the lateral mode distribution, as revealed by time-resolved spectroscopy of the lasing spectrum. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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