Author(s): Gao, X (Gao, Xu); Guo, QQ (Guo, Qiangqiang); Yang, K (Yang, Ke); Zhai, SQ (Zhai, Shenqiang); Zhuo, N (Zhuo, Ning); Li, Y (Li, Yuan); Zhang, JC (Zhang, Jinchuan); Wang, LJ (Wang, Lijun); Liu, SM (Liu, Shuman); Liu, FQ (Liu, Fengqi); Wang, XH (Wang, Xiaohua); Wei, ZP (Wei, Zhipeng); Liu, JQ (Liu, Junqi)

Source: OPTICS EXPRESS Volume: 31 Issue: 25  Pages: 42677-42686  DOI: 10.1364/OE.510520  Published: DEC 4 2023 

Abstract: Microresonator-based high-speed single-mode quantum cascade lasers are ideal candidates for on-chip optical data interconnection and high sensitivity gas sensing in the mid-infrared spectral range. In this paper, we propose a high frequency operation of single-mode doughnut-shaped microcavity quantum cascade laser at similar to 4.6 mu m. By leveraging compact micro -ring resonators and integrating with grounded coplanar waveguide transmission lines, we have greatly reduced the parasitics originating from both the device and wire bonding. In addition, a selective heat dissipation scheme was introduced to improve the thermal characteristics of the device by semi-insulating InP infill regrowth. The highest continuous wave operating temperature of the device reaches 288 K. A maximum -3 dB bandwidth of 11 GHz and a cut-off frequency exceeding 20 GHz in a microwave rectification technique are obtained. Benefiting from the notch at the short axis of the microcavity resonator, a highly customized far-field profile with an in-plane beam divergence angle of 2.4 degrees is achieved.

Accession Number: WOS:001124447000004

PubMed ID: 38087636

ISSN: 1094-4087