Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Richerche (CNR), Firenze FI, Italy.
Opt Lett. 2012 Mar 15;37(6):1011-3. doi: 10.1364/OL.37.001011.
A narrow-linewidth comb-linked nonlinear source is used as master radiation to injection lock a room-temperature mid-infrared quantum cascade laser (QCL). This process leads to a direct lock of the QCL to the optical frequency comb, providing the unique features of narrow linewidth, absolute frequency, higher output power, and wide mode-hop-free tunability. The QCL reproduces the injected radiation within more than 94%, with a reduction of the frequency-noise spectral density by 3 to 4 orders of magnitude up to about 100 kHz, and a linewidth narrowing from a few MHz to 20 kHz.
窄线宽梳状连接非线性源用作主辐射，对室温中红外量子级联激光器（QCL）进行注入锁定。这一过程直接将 QCL 锁定到光频梳，从而具有窄线宽、绝对频率、更高输出功率和宽无跳模调谐的独特性能。QCL 对注入辐射的再现率超过 94%，其频率噪声谱密度降低了 3 到 4 个数量级，达到约 100 kHz，线宽从几兆赫兹窄至 20 kHz。
