Superimposed grating WDM tunable lasers
文献类型：专利
| 作者 | AVRUTSKY, IVAN; ANIS, HANAN; MAKINO, TOSHI; XU, JINGMING |
| 发表日期 | 2000-10-31 |
| 专利号 | US6141370 |
| 著作权人 | BOOKHAM TECHNOLOGY PLC |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Superimposed grating WDM tunable lasers |
| 英文摘要 | A superimposed grating tunable WDM semiconductor laser is provided comprising a grating structure is a binary superimposed grating comprising a plurality of segments of equal dimension, s, each segment having one of two values of refractive index, whereby the grating structure is provided by a binary modulation of the refractive index modulation of segments s along the length of the grating. Thus, for a superimposed grating structure for an optoelectronic device for providing a spectrum comprising j reflection peaks at wavelengths lambda j, the grating comprising a binary superimposed grating (BSG) having a sequence of a plurality of segments of equal size s, each segment of the sequence having a refractive index of one of two values wherein the effective waveguide index of the ith segment ni0( lambda ) is allowed to be changed by DELTA nx(m-+E,fra 1/2+EE ) with m=1 or m=0: where i=1,2,3 . . . is the segment number, for digital position ixs, n0( lambda ) is a waveguide effective index, including both waveguide and material dispersion, and the function f(x) is a weighted sum of sinusoidal functions of desirable period LAMBDA j and, periods LAMBDA j relate to the spectral positions of reflection peaks lambda j through the waveguide index n0( lambda ) LAMBDA j= lambda j/2n0( lambda j) Thus each grating is defined in a truly binary fashion as a digitized binary representation of elements providing a sum of component functions. The structure is readily fabricated by electron beam lithography at normal resolution. The ease of fabrication makes this structure desirable for front and back reflectors for tunable WDM lasers for applications such as tunable lasers for telecommunications applications and provides for an extended tuning range with excellent performance characteristics. |
| 公开日期 | 2000-10-31 |
| 申请日期 | 1999-02-19 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/47458]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | BOOKHAM TECHNOLOGY PLC |
| 推荐引用方式 GB/T 7714 | AVRUTSKY, IVAN,ANIS, HANAN,MAKINO, TOSHI,et al. Superimposed grating WDM tunable lasers. US6141370. 2000-10-31. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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