Fig. 3From: Sample Grating Distributed Feedback Quantum Cascade Laser ArrayThe spectrum of all three lasers in the array and the injected currents keep at 1.2 I th in CW mode at 20 °C. Inset (a) and inset (b) the spectrum of no. 2 in the array with current changing from 170 to 200 mA at 20 °C and with the temperature changing from 5–25 °C at 200 mA, respectivelyBack to article page