Acetone gas sensing using a hybrid mid-infrared fluoride fiber laser

Our recent advancements in the development of a hybrid mid-infrared fiber laser setup tailored specifically for the measurement of acetone gas concentrations are presented. The laser configuration incorporates a fiber Bragg grating (FBG) inscribed in an Erbium-doped zirconium fluoride fiber, achieved through the direct-write plane-by-plane femtosecond laser inscription method, coupled with a free space broadband reflection. By employing the dual wavelength pumping technique, the laser system demonstrated good performance, generating an output power exceeding 500 mW and exhibiting a slope efficiency of 15.2 %. Utilizing this setup, we successfully detected acetone vapor at 3.46 μm absorption band. The versatility demonstrated by this scheme underscores its potential for future applications in multifaceted breath analysis applications, showcasing a promise for extensive multi-compound analysis.