Fig. 2From: Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Lasera The normalized emission spectra of the EC-QCL measured at 25 °C in cw operation with the current of 330 mA. The adjacent spectrum was measured with the galvanometer rotating step of 0.1°. b Measured output power (red curve) and SMSR (black point) of the EC-QCL at different scanning galvanometer anglesBack to article page