QUANTUM CASCADE LASER SOURE WITH ULTRABROADBAND SPECTRAL COVERAGE
摘要
A broadband quantum cascade laser includes multiple gain regions and a spacer layer disposed between at least two of the gain regions. The arrangement and characteristics of the gain regions and the spacer layer may be configured to reduce cross absorption between the gain regions. For example, one gain region may be configured to produce gain in an energy range in which another gain region produces absorptive effects. The thickness of the spacer layer may be selected to separate optical modes produced by adjacent gain regions while still producing a single broadband output from the quantum cascade laser. Gain competition between gain stages within a gain region may be mitigated by dividing gain stages with overlapping gain curves among multiple gain regions.
申请公布号
WO2011126799(A2)
申请公布日期
2011.10.13
申请号
WO2011US30164
申请日期
2011.03.28
申请人
PRESIDENT AND FELLOWS OF HARVARD COLLEGE;DIEHL, LAURENT;PFLUGL, CHRISTIAN;BLANCHARD, ROMAIN;CAPASSO, FEDERICO