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Schematic of the fiber-optic-based singlet oxygen generator (FOSG): (1) continuous-wave laser; (2) microscope objective; (3) cuvette; (4) cuvette top with tube coupled to compressed oxygen tank; (5) laser-to-fiber coupler with micrometer x–y (a) and y–z (b) translation resolution; (6) hollow core fiber-optic transporting oxygen gas and 473 nm light; (7) aqueous reaction solution containing the distal end of the fiber capped with the singlet oxygen sensitizing porous Vycor glass tip.
