Coupled Cavities Ring Laser

Abstract

This thesis aims to study the development of coupled cavities ring laser in sensing applications using different technologies. For this purpose, a novel architecture of coupled cavities has been proposed based on dual coupler ring resonator coupled to a ring laser cavity. The novel configuration was studied in passive mode of operation (without gain medium) and compared to the conventional configurations of coupled cavities. The effect of introducing a gain medium to compensate the cavity losses was also studied for single and coupled cavities. The active cavity was then used to increase the sensitivity of spectroscopic gas sensing using incoherent broadband cavity enhanced spectroscopy (IBCEAS) technique. The operation of the ring laser with the proposed configuration as sensor was then studied and demonstrated as gyroscopic sensor.