摘要
We present optical frequency combs with a spectral emission of 48 cm-1and an output power of 420 m W based on a single-core quantum cascade laser at λ ~ 8.7μm. A flat top spectrum sustains up to 130 comb modes delivering ~ 3.2 m W of optical power per mode, making it a valuable tool for dual comb spectroscopy. The homogeneous gain medium, relying on a slightly diagonal bound-to-continuum structure, promises to provide a broad and stable gain for comb operating. Remarkably, the dispersion of this device is measured within 300 fs2/mm to ensure stable comb operation over 90% of the total current range. The comb is observed with a narrow beatnote linewidth around 2 k Hz and has weak dependence on the applied current for stable comb operation.
作者
马钰
李伟江
许云飞
刘俊岐
卓宁
杨科
张锦川
翟慎强
刘舒曼
王利军
刘峰奇
Yu Ma;Wei-Jiang Li;Yun-Fei Xu;Jun-Qi Liu;Ning Zhuo;Ke Yang;Jin-Chuan Zhang;Shen-Qiang Zhai;Shu-Man Liu;Li-Jun Wang;Feng-Qi Liu(Key Laboratory of Semiconductor Materials Science,and Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)
基金
supported by the National Natural Science Foundation of China(Grant Nos.61734006,61835011,61991430,and 62174158)
the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Grant No.2021107)
the Key Program of the Chinese Academy of Sciences(Grant Nos.XDB43000000,YJKYYQ20190002,and QYZDJ-SSW-JSC027)。
