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1. 发明授权

US06728282B2 Engineering the gain/loss profile of intersubband optical devices having heterogeneous cascades 有权
标题翻译：设计具有异质级联的子带间光学器件的增益/损耗曲线
公开(公告)号：US06728282B2
公开(公告)日：2004-04-27
申请号：US09883542
申请日：2001-06-18
申请人： Federico Capasso , Alfred Yi Cho , Rafaelle Colombelli , Claire F. Gmachl , Hock Min Ng , Deborah Lee Sivco
发明人： Federico Capasso , Alfred Yi Cho , Rafaelle Colombelli , Claire F. Gmachl , Hock Min Ng , Deborah Lee Sivco
IPC分类号： H01S500
CPC分类号： B82Y20/00 , H01S5/3402 , H01S5/3422 , H01S5/4087 , H01S2301/18
摘要： An optical device includes a stack of at least two different intersubband (ISB) optical sub-devices in which the gain/loss profiles of the individual ISB sub-devices are mutually adapted, or engineered, so as to generate a predetermined overall function for the combination. We define this combination device as being heterogeneous since not all of the individual ISB sub-devices are identical to one another. Illustratively, the parameters of each individual ISB sub-device that might be subject to this engineering process include: the peak energy of the ISB optical transitions (emission or absorption) associated with each RT region, the position of each sub-device in the stack; the oscillator strengths of these ISB transitions; the energy bandwidth of each transition; and the total length of the RT and I/R regions of each ISB sub-device. In one embodiment, our approach may be used to engineer a gain profile that has peaks at a multiplicity of different wavelengths, thus realizing a multi-wavelength ISB optical source in which the applied electric field self-proportions itself so that each individual ISB sub-device experiences the appropriate field strength for its particular design. Alternatively, the gain profile may be engineered to be relatively flat over a predetermined wavelength range. In another embodiment, our approach may be used to generate a function that compensates for a characteristic of another device. For example, our heterogeneous ISB device may be engineered to have a gain profile that compensates for the loss profile of another device. Alternatively, the gain/loss profile may be engineered to produce a nonlinear refractive index profile in our device that compensates for that of another device (e.g., an optical fiber).
摘要翻译：光学装置包括至少两个不同的子带间（ISB）光学子装置的叠层，其中各个ISB子装置的增益/损耗曲线相互适应或设计，以便产生预定的整体功能组合。我们将此组合设备定义为异构，因为并非所有的单个ISB子设备都是相同的。示例性地，可能受该工程过程影响的各个ISB子设备的参数包括：与每个RT区域相关联的ISB光学跃迁（发射或吸收）的峰值能量，堆叠中每个子设备的位置 ; 这些ISB转换的振荡器强度; 每个过渡的能量带宽; 以及每个ISB子设备的RT和I / R区域的总长度。在一个实施例中，我们的方法可以用于设计在多个不同波长处具有峰值的增益分布，从而实现多波长ISB光源，其中所施加的电场自身比例，使得每个单独的ISB子载波，设备体验其特定设计的适当场强。或者，增益分布可以被设计为在预定波长范围上相对平坦。在另一个实施例中，我们的方法可以用于产生补偿另一设备的特性的功能。例如，我们的异构ISB设备可以被设计为具有补偿另一设备的丢失简档的增益简档。或者，增益/损耗曲线可以被设计为在我们的装置中产生非线性折射率分布，其补偿另一装置（例如，光纤）的折射率分布。

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