Chemical oxygen iodine laser, or COIL, is an impressive type of chemical laser and is widely adopted in the past several decades. A novel approach for obtaining high power vortex beam is explored. A seed vortex beam is amplified by a chemical oxygen iodine amplifier. Numerical simulation is carried out to confirm the feasibility of obtaining high power vortex beam based on chemical oxygen iodine amplifiers. The behavior of the vortex beam is also revealed. As the beam is modulated by the gain media, the beam profile gets asymmetric, and the vortex center no longer locates at the midpoint between the upstream and downstream intensity maximum points. This study suggests a potential approach for developing chemical oxygen iodine lasers.
Chemical oxygen iodine laser, or COIL, is an impressive type of chemical laser that emits high power beam with good atmospheric transmissivity. Chemical oxygen iodine lasers with continuous-wave plane wave output are well-developed and are widely adopted in directed energy systems in the past several decades. Approaches of generating novel output beam based on chemical oxygen iodine lasers are explored in the current study. Since sophisticated physical processes including supersonic flowing of gaseous active media, chemical reacting of various species, optical power amplification, as well as thermal deformation and vibration of mirrors take place in the operation of COIL, a multi-disciplinary model is developed for tracing the interacting mechanisms and evaluating the performance of the proposed laser architectures. Pulsed output mode with repetition rate as high as hundreds of kHz, pulsed output mode with low repetition rate and high pulse energy, as well as novel beam with vector or vortex feature can be obtained. The results suggest potential approaches for expanding the applicability of chemical oxygen iodine lasers.
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