77 K cw operation of distributed Bragg reflector Pb1−xSnxSe/ Pb1−xyEuySnxSe diode lasers

Abstract
Distributed Bragg reflector Pb1−xSnxSe/ Pb1−xyEuySnxSe double heterostructure stripe geometry diode lasers were fabricated using molecular beam epitaxy. We observed cw single mode operation between the heat‐sink temperatures 66 and 81 K at λ≊7.8 μm with an average tuning rate of 0.8 cm1/K. Single mode continuous tuning over a relatively wide range of 6 cm1, with an average tuning rate of 0.026 cm1/mA, was obtained at 77 K.