论文标题
中红外量子级联激光频率梳子，带有微带样线波导几何形状
Mid-infrared quantum cascade laser frequency combs with a microstrip-like line waveguide geometry
论文作者
论文摘要
在这项工作中，提出了增强设备的高频响应和梳子特性的中红外量子级联激光器（QCL）频率梳子的设计。在大量的N掺杂INP：SI基板上生长的最先进的活动区域（AR）被处理成具有微带样线波导的埋入异质结构。结果，重复率频率$ f_ {rep} $，左右11.09 GHz，可以锁定到注射的窄线宽度射频（RF）信号，范围超过200 kHz，注射功率为-10 dBm，这可以超过正常的掩埋的杂物计划。此外，在Powers的RF注入高于20 dBm的情况下，激光频谱被扁平并显着宽，从24 $ cm^{ - 1} $到65 $ cm^{ - 1} $在带宽中，而同时维持梳子的连贯性并进行了验证。
In this work, a design for a mid-infrared quantum cascade laser (QCL) frequency comb source that enhances the high frequency response and the comb characteristics of the device is presented . A state-of-the-art active region (AR), grown on a heavily n-doped InP:Si substrate, was processed into a buried heterostructure with a microstrip-like line waveguide. As a result, the repetition rate frequency $f_{rep}$, around 11.09 GHz, can be locked to an injected narrow-linewidth radio frequency (RF) signal, over a range of more than 200 kHz with -10 dBm of injected power, which outperforms normal buried heterostructure schemes by an order of magnitude. Moreover, under RF injection at powers higher than 20 dBm, the lasing spectrum is flattened and significantly broadened, from 24 $cm^{-1}$ to 65 $cm^{-1}$ in bandwidth, while at the same time the coherence of the comb is maintained and verified.
