Microelectromechanical systems (MEMS) offer a promising approach for creating compact, efficient chemical oxygen
iodine lasers. In this paper we report the demonstration and characterization of a chip-scale, MEMS-based singlet
oxygen generator, or microSOG. The microSOG is a batch-fabricated silicon chip that is micromachined to form
reactant inlets and distribution system, an array of microstructured packed bed reaction channels to ensure good mixing
between the BHP and the chlorine, a gas-liquid separator that removes liquid from the output stream by capillary effects,
integrated heat exchangers to remove the excess heat of reaction, and product outlets. The microSOG has successfully
generated singlet delta oxygen, and the resulting singlet delta concentrations were measured in a quartz test cell
downstream of the chip using absolutely-calibrated near-infrared emission measurements made by an InGaAs array
spectrometer. A kinetics analysis was used to determine the concentration at the chip's outlet from the concentration at
the measurement point. Singlet delta yield at the outlet was determined to be about 81% at 150 Torr plenum pressure
with a 25 sccm flow of chlorine. The corresponding output flow carries about 1.4 W of power at the chip's outlet.
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