Affiliation:
1. Tongji University
2. Shanghai Frontiers Science Center of Digital Optics
3. Shanghai Professional Technical Service Platform for Full-Spectrum and High-Performance Optical Thin Film Devices and Applications
Abstract
The
thermal effects of quantum
cascade lasers (QCLs) can cause wavelength locking instability and
reduce output power in external cavity spectral beam combining
(EC-SBC) systems. We propose a micro-channel structure (MCH) for heat
dissipation and temperature control that rapidly stabilizes the QCL at
20.159°C, showing a linear relationship with the controlled
temperature. Experimental comparisons demonstrate that MCH enhances
the heat transfer rate within the structure, reducing the time
required to stabilize and control QCL temperature. The output power
and locked wavelength remain stable in the EC-SBC system under high
currents. This study provides technical support for heat dissipation
QCL arrays.
Funder
National Natural Science Foundation of
China
Fundamental Research Funds for the
Central Universities