학술논문
Thermally Tunable Quantum Cascade Laser With an External Germanium-on-SOI Distributed Bragg Reflector
Document Type
Periodical
Author
Source
IEEE Journal of Selected Topics in Quantum Electronics IEEE J. Select. Topics Quantum Electron. Selected Topics in Quantum Electronics, IEEE Journal of. 25(6):1-7 Jan, 2019
Subject
Language
ISSN
1077-260X
1558-4542
1558-4542
Abstract
Quantum cascade lasers (QCLs) are essential components for mid-infrared optical spectroscopy. Currently, widely tunable QCLs are using an external diffraction grating to tune the laser wavelength. In this paper we present a compact tunable QCL that is thermally tuned by a distributed Bragg reflector (DBR) implemented on a Germanium-on-SOI (Ge-on-SOI) waveguide circuit. The 5.1x $\mu \rm m$ wavelength laser, operating in pulsed mode at room temperature, is continuously tuned over 50 nm.