Quantum well device and apparatus comprising the device

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	Quantum well device and apparatus comprising the device
其他题名	Quantum well device and apparatus comprising the device
	BERTHOLD, KURT; LEVI, ANTHONY FREDERIC JOHN; NORDIN, RONALD A.; NOTTENBURG, RICHARD N.
	1991-03-20
专利权人	AT&T CORP.
公开日期	1991-03-20
授权国家	欧洲专利局
专利类型	发明申请
摘要	The inventive quantum well opto-electronic devices of cavity length LC comprise, in addition to a "gain" section (20), a "loss" section (21) that is optically coupled to the gain section (20) but electrically substantially isolated therefrom. Through change of the electrical bias on the loss section (21) the modal gain of the cavity can be changed. Devices according to the invention are useful in a variety of applications. Exemplarily, by making (in an inventive laser) LC/LA greater than about 20 (LA is the length of the loss section) and making the electrical isolation between the gain section (20) and the loss section (21) greater than about 3kΩ, fast amplitude modulation of the laser radiation is possible. By applying appropriate AR coatings to the cavity of an inventive device, a fast variable-gain optical amplifier can be made. Finally, an inventive laser can be switched electrically between two widely spaced wavelengths, the wavelength difference being at least 10 nm. This makes possible use of inventive devices in apparatus such as information storage systems, information processing systems, and communication systems. Methods of operating such apparatus are also disclosed.
其他摘要	除了“增益”部分（20）之外，本发明的腔长LC的量子阱光电器件还包括“损耗”部分（21），其光学耦合到增益部分（20）但是电气基本上与其隔离。。通过改变损耗部分（21）上的电偏压，可以改变腔的模态增益。根据本发明的装置可用于各种应用。示例性地，通过使（在本发明的激光器中）LC / LA大于约20（LA是损耗部分的长度）并使增益部分（20）和损耗部分（21）之间的电隔离大于约3kΩ ，激光辐射的快速幅度调制是可能的。通过将适当的AR涂层施加到本发明装置的腔体，可以制造快速可变增益光学放大器。最后，本发明的激光器可以在两个间隔很宽的波长之间电切换，波长差至少为10nm。这使得可以在诸如信息存储系统，信息处理系统和通信系统之类的装置中使用本发明的装置。还公开了操作这种装置的方法。
主权项	Apparatus comprising an opto-electronic device that comprises a semiconductor body, the body comprising a gain section and, optically coupled to the gain section but electrically substantially isolated therefrom, a loss section of length L A, associated with the body being a length L C and a gain for radiation of a given wavelength, the body comprising at least one quantum well, associated with the quantum well being a first and a second energy sub-band; the apparatus further comprising a) means for causing the flow of an electrical current through the gain section; b) means for changing the gain for radiation of the given wavelength; and c) means for utilizing radiation emitted by the device, CHARACTERIZED IN THAT d) the device is a first laser wherein the means of b) are adapted for changing, without changing L C, the gain from a first value associated with the emission of first radiation of wavelength λ₁ to a second value that is associated with the emission of second radiation of wavelength λ₂, with \|λ₁-λ₂\| being at least 10 nm; or e) the device is a second laser wherein L C/L A is greater than 10; and an electrical isolation resistance between the gain section and the loss section is at least about 3kΩ; whereby the gain for radiation of the given wavelength can be changed by changing the loss section bias, and whereby fast modulation of radiation emitted by the laser can be attained; or f) the device is an optical amplifier, the semiconductor body having two faces, with an antireflection coating for the given wavelength on at least one of the faces, and the apparatus comprises means for impinging radiation of the given wavelength on one of the faces.
申请日期	1990-09-07
专利号	EP0417989A2
专利状态	失效
申请号	EP1990309806
公开（公告）号	EP0417989A2
IPC 分类号	G02F1/35 \| G02F3/00 \| H01S3/106 \| H01S5/00 \| H01S5/026 \| H01S5/042 \| H01S5/06 \| H01S5/062 \| H01S5/0625 \| H01S5/187 \| H01S5/34 \| H01S5/50 \| H01S3/085 \| H04B10/04
专利代理人	-
代理机构	WATTS, CHRISTOPHER MALCOLM KELWAY, DR.
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/67738
专题	半导体激光器专利数据库
作者单位	AT&T CORP.
推荐引用方式 GB/T 7714	BERTHOLD, KURT,LEVI, ANTHONY FREDERIC JOHN,NORDIN, RONALD A.,et al. Quantum well device and apparatus comprising the device. EP0417989A2[P]. 1991-03-20.

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