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Regrowth-free gain-coupled GaSb-based DFB lasers suitable for gas sensing were fabricated. Threshold currents for 2.4 mum emission of 400 mum-long DFB devices were 45 mA with a total output power of nearly 11 mW in CW operation at 20degC.
The fabrication of a reduced phase error, distributed feedback fiber laser in erbium-doped fiber is presented. Using the Trace Grating technique, the overall phase error has been reduced by a factor of 2.5.
We demonstrate a surface emitting optofluidic dye laser using a second order circular grating distributed feedback resonator. The optofluidic dye laser offers a low-cost and integrated coherent light source for lab-on-a-chip spectroscopy systems.
We report on a lateral grating, distributed feedback quantum cascade (QC) laser operating at 3.45 mum with the intended application of trace gas detection. It is the shortest wavelength, single mode QC laser.
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