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	Multiple wavelength quantum cascade light source
	CAPASSO, FEDERICO; CHO, ALFRED YI; GMACHL, CLAIRE F.; HUTCHINSON, ALBERT LEE; SIVCO, DEBORAH LEE; TREDICUCCI, ALESSANDRO
	2000-11-14
著作权人	LUCENT TECHNOLOGIES INC.
专利号	US6148012
国家	美国
文献子类	授权发明
其他题名	Multiple wavelength quantum cascade light source
英文摘要	A multiple wavelength quantum cascade (QC) superlattice (SL) light source has at least three energy levels in each radiative transition (RT) region, and electron transitions between the levels give rise to emission lines at different wavelengths. In one embodiment, a lower miniband has at least a first energy level and an upper miniband has at least third and fourth energy levels. In another embodiment, the lower miniband has first and second energy levels. In both cases, electron transitions between a first pair of the upper and lower levels generates light at a first spontaneous emission line having a center wavelength lambda 1 and a line broadening first energy, and electron transitions between a second pair of the upper and lower levels generates light at a second spontaneous emission line having a center wavelength lambda 2 and a line broadening second energy. The energy separation of the center wavelengths is greater than the larger of the first and second line broadening energies, and means are provided for inhibiting the relaxation of electrons from the fourth level to said third level. In a preferred embodiment, which is particularly suited to lasers made from Group III-V compound semiconductors, the inhibiting means hinders the emission of optical phonons. One way to inhibit these phonons is to make the energy separation of the upper levels less than the energy of an optical phonon in the active region.
公开日期	2000-11-14
申请日期	1998-10-21
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/46049]
专题	半导体激光器专利数据库
作者单位	LUCENT TECHNOLOGIES INC.
推荐引用方式 GB/T 7714	CAPASSO, FEDERICO,CHO, ALFRED YI,GMACHL, CLAIRE F.,et al. Multiple wavelength quantum cascade light source. US6148012. 2000-11-14.

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