Photonic-crystal distributed-feedback and distributed bragg-reflector lasers
文献类型：专利
| 作者 | VURGAFTMAN, IGOR; MEYER, JERRY |
| 发表日期 | 2003-09-11 |
| 专利号 | US20030169787A1 |
| 著作权人 | UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY, THE |
| 国家 | 美国 |
| 文献子类 | 发明申请 |
| 其他题名 | Photonic-crystal distributed-feedback and distributed bragg-reflector lasers |
| 英文摘要 | A photonic-crystal distributed-feedback laser includes a laser cavity with a waveguide structure that has a cavity length Lc and is bounded by two mirrors; an active region for producing optical gain upon receiving optical pumping or an input voltage; at least one layer having a periodic two-dimensional grating with modulation of a modal refractive index, the grating being defined on a rectangular lattice with a first period along a first axis of the grating and a second period along a second perpendicular axis of the grating, and wherein the grating produces three diffraction processes having coupling coefficients kappa1', kappa2', kappa3'; and a lateral gain area contained within a second area patterned with the grating that has substantially a shape of a gain stripe with a width W, with the gain stripe tilted at a first tilt angle relative to the two mirrors. The rectangular lattice of the grating is tilted at a second tilt angle substantially the same as the first tilt angle with respect to the gain stripe, and the ratio of the first and second grating periods is equal to the tangent of the first tilt angle, with the first tilt angle being between about 16° and about 23°. The hexagonal lattice does not need to be tilted with respect to the two mirrors. The laser's output emerges along the normal to a facet irrespective of the operating laser wavelength, facilitating coupling the laser light into a fiber or other optical system while avoiding beam steering. The two-dimensional nature of the feedback in the laser provides for varying the wavelength through angle tuning. Wavelength tuning by changing the propagation direction (propagation angle) permits a straightforward selection of different wavelengths from photonic crystal devices monolithically fabricated on a single wafer. The fabrication procedure is straightforward since no ridges need to be defined. The single-mode spectral purity of the rectangular-lattice PCDFB is robust, owing to the near absence of side modes, and exhibits good beam quality. |
| 公开日期 | 2003-09-11 |
| 申请日期 | 2003-03-07 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/64028]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY, THE |
| 推荐引用方式 GB/T 7714 | VURGAFTMAN, IGOR,MEYER, JERRY. Photonic-crystal distributed-feedback and distributed bragg-reflector lasers. US20030169787A1. 2003-09-11. |
入库方式： OAI收割
来源：西安光学精密机械研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。