发明名称 |
Apparatus comprising a quantum cascade laser having improved distributed feedback for single-mode operation |
摘要 |
An article comprising a QC-DFB laser is disclosed. In the QC-DFB laser, an overlying grating structure achieves relatively strong coupling of the guided mode to the grating, and is thus highly effective in inducing single-mode operation even under cw operating conditions. The grating structure includes grooves etched in a plasmon-enhanced confinement layer (PECL) disposed adjacent and in contact with an upper metallic electrode. The grating structure and the PECL are designed such that in the grooves, the laser mode travelling in the waveguide can couple efficiently to the surface-plasmon at the electrode interface. This results in strong modulation of the laser mode, leading to strong modulation of, inter alia, the effective refractive index. |
申请公布号 |
US6400744(B1) |
申请公布日期 |
2002.06.04 |
申请号 |
US20000512757 |
申请日期 |
2000.02.25 |
申请人 |
LUCENT TECHNOLOGIES, INC. |
发明人 |
CAPASSO FEDERICO;CHO ALFRED YI;CHU SUNG-NEE GEORGE;GMACHI CLAIRE F.;KOEHLER RUEDEGER;SIVCO DEBORAH LEE;TREDICUCCI ALESSANDRO |
分类号 |
H01S5/125;H01S5/042;H01S5/10;H01S5/12;H01S5/34;(IPC1-7):H01S5/00;H01S3/08 |
主分类号 |
H01S5/125 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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