Optimization of broadband Quantum Cascade lasers for continuous wave operation
07 July 2003
We have optimized the design of the broadband quantum cascade laser for continuous wave operation. The improved design leads to a gain ripple about 4 1/cm over more than 0.5 micron spectral range. Simultaneous continuous wave emission at several wavelengths spanning the range between 6.7 and 7.4 micron has been achieved in a temperature interval from 20 to 77 K.