Widely-Tunable Cascade Laser for Gas Spectroscopic Applications
PI: G. Belenky
The proposed design of 3.2 mm semiconductor laser for optical communication links offers electrical tuning of the emission waveiength with the fastest response. This makes it possible to employ frequency modulation in the laser-based free space systems for improved signal-noise ratio and extended range. Spectroscopic applications require narrow-linewidth single-mode widely tunable devices which allow for both coarse and fine wavelength tuning. In our research program, we have demonstrated already high potentials of type-II Sb-based lasers for coarse multimode tuability.
We designed and fabricate uointly with Maxion Technology MD) the novel ultrawide, 3.4~m tunable type-II mid-IR interband cascade laser. Device operates based on above-threshold Stark shifts. Our results demonstrate laser tuning of 120 nm (120 cm-1). Now we are focusing on development of single-mode MIR laser in the wavelength region between 3 and 4 ~m which is of special interest for applications such as earth atmospheric measurements, identification of chemical agents including industrial process control. (ARO)