Quantum cascade laser

mid-IR applications such as trace gas analysis in environmental monitoring.

single mode QCL operation tune the wavelength without mode hopping

4530nm-7730nm Quantum cascade lasers, also known as QCL, from Hamamatsu are semiconductor lasers that offer peak emission in the mid-IR range of 4000nm to 10,000nm. They have gained considerable attention as a new light source for mid-IR applications such as molecular gas analysis. QCL lasers using structures of SPC and distributed feedback (DFB) emit CW (continuous wave) mid-IR laser under room temperature. By controlling the QCL chip's operating temperature through the peltier element installed in the HHL packaged, it is possible to tune the wavelength without mode hopping while while keeping longitudinal single mode QCL operation.