Kumar Rakesh Ranjan, Hänsel Andreas, Far Brusatori Mónica, Nielsen Lars, Augustin Luc M, Volet Nicolas, Heck Martijn J R
Opt Lett. 2022 May 1;47(9):2346-2349. doi: 10.1364/OL.454478.
We report a monolithically integrated coupled extended-cavity distributed Bragg reflector laser with, to our knowledge, the lowest reported intrinsic linewidth of ∼10 kHz, which is extracted from a corresponding frequency-noise level of ∼3200 Hz/Hz, realized on an InP generic foundry platform. Using the delayed self-heterodyne method, the experimentally measured linewidth was 45 kHz. The laser has an on-chip optical output power of 18 mW around 1550 nm at an injection current of 95 mA. The laser operates in a single-mode regime with a side-mode suppression ratio of 54 dB. Our monolithic approach paves the way toward further integration, such as integrated quantum key distribution transceivers.
据我们所知，我们报道了一种单片集成耦合扩展腔分布布拉格反射器激光器，其本征线宽约为10 kHz，是从约3200 Hz/Hz的相应频率噪声水平中提取出来的，该激光器是在InP通用代工平台上实现的。使用延迟自外差法，实验测量的线宽为45 kHz。该激光器在95 mA的注入电流下，在1550 nm附近的片上光输出功率为18 mW。该激光器工作在单模状态，边模抑制比为54 dB。我们的单片集成方法为进一步集成，如集成量子密钥分发收发器，铺平了道路。
