Monolithic dispersion engineered mid-infrared quantum cascade laser frequency comb  

作　　者：DAPENG WU YU MA YONGQIANG SUN RUIXIN HUANG JINCHUAN ZHANG SHUMAN LIU NING ZHUO SHENQIANG ZHAI FENGMIN CHENG FENGQI LIU QUANYONG LU 

机构地区：[1]Laboratory of Solid-State Optoelectronics Information Technology,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]Division of Quantum Materials and Devices,Beijing Academy of Quantum Information Sciences,Beijing 100193,China [3]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Photonics Research》2024年第11期2566-2572,共7页光子学研究(英文版)

基　　金：National Natural Science Foundation of China(61991430,12393830,12274404,62222408,62235016,62274014);Beijing Municipal Science&Technology Commission(Z221100002722018)。

摘　　要：The high-power quantum cascade laser(QCL)frequency comb capable of room temperature operation is of great interest to high-precision measurement and low-noise molecular spectroscopy.While a significant amount of research is devoted to the longwave spectral range,shortwave 3–5μm QCL combs are still relatively underdeveloped due to the excessive material dispersion.In this work,we propose a monolithic integrated multimode waveguide scheme for effective dispersion engineering and high-power-efficiency operation.Over watt-level output power at room temperature with a wall plug efficiency of 7%and robust dispersion reduction is achieved from a quantum cascade laser frequency comb at a wavelength approximately 4.6μm.Narrow beatnote linewidth less than 1 kHz and clear dual-comb multiheterodyne comb lines manifest the coherent phase relation among the comb modes which is crucial to fast molecular spectroscopy.This monolithic dispersion engineered waveguide design is also compatible to an efficient active–passive optical coupling scheme and would open up a new research playground for ring comb and on-chip dual-comb spectroscopy.

关 键 词：WAVEGUIDE LASER DISPERSION 

分 类 号：TN2[电子电信—物理电子学]