Light source for swept source optical coherence tomography based on cascaded distributed feedback lasers with engineered band gaps

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	Light source for swept source optical coherence tomography based on cascaded distributed feedback lasers with engineered band gaps
其他题名	Light source for swept source optical coherence tomography based on cascaded distributed feedback lasers with engineered band gaps
	ZHOU, YAN; O'HARA, KEITH E.
	2008-02-14
专利权人	CARL ZEISS MEDITEC, INC.
公开日期	2008-02-14
授权国家	美国
专利类型	发明申请
摘要	The present invention is a tunable semiconductor laser for swept source optical coherence tomography, comprising a semiconductor substrate; a waveguide on top of said substrate with multiple sections of different band gap engineered multiple quantum wells (MQWs); a multiple of distributed feedback (DFB) gratings corresponding to each said band gap engineered MWQs, each DFB having a different Bragg grating period; and anti-reflection (AR) coating deposited on at least the laser emission facet of the laser to suppress the resonance of Fabry-Perot cavity modes. Each DFB MQWs section can be activated and tuned to lase across a fraction of the overall bandwidth as is achievable for a single DFB laser and all sections can be sequentially activated and tuned so as to collectively cover a broad bandwidth, or simultaneously activated and tuned to enable a tunable multi-wavelength laser. The laser hence can emit either a single lasing wavelength or a multiple of lasing wavelengths and is very suitable for swept-source OCT applications.
其他摘要	本发明是一种用于扫频光源相干断层扫描的可调谐半导体激光器，包括半导体衬底;所述衬底顶部的波导，具有不同带隙工程多量子阱（MQW）的多个部分;多个分布式反馈（DFB）光栅，对应于每个所述带隙工程MWQ，每个DFB具有不同的布拉格光栅周期;和抗反射（AR）涂层至少沉积在激光器的激光发射面上，以抑制法布里 - 珀罗腔模式的共振。每个DFB MQW部分都可以被激活和调整，以激发整个带宽的一小部分，这对于单个DFB激光器是可实现的，并且所有部分可以被顺序地激活和调谐，以便共同覆盖宽带宽，或者同时激活和调谐到启用可调谐多波长激光器。因此，激光可以发射单个激光波长或多个激光波长，并且非常适合于扫频光源OCT应用。
申请日期	2006-08-11
专利号	US20080037608A1
专利状态	授权
申请号	US11/503046
公开（公告）号	US20080037608A1
IPC 分类号	H01S5/00
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/88937
专题	半导体激光器专利数据库
作者单位	CARL ZEISS MEDITEC, INC.
推荐引用方式 GB/T 7714	ZHOU, YAN,O'HARA, KEITH E.. Light source for swept source optical coherence tomography based on cascaded distributed feedback lasers with engineered band gaps. US20080037608A1[P]. 2008-02-14.