This paper presents the development and characterization of a photovoltaic (PV) optical fiber, where a dye-sensitized solar cell (DSC) structure is deposited on a claddingless optical fiber. The DSC consists of a ZnO:Al transparent current collector layer, a TiO₂ photoelectrode sensitized with a ruthenium dye, a gelatinized iodine electrolyte, and a carbon-based counter electrode. The fibers used were both silica and plastic optical fibers, made electrically conductive by coating with ZnO:Al using atomic layer deposition (ALD). The performance of the PV optical fibers was characterized using current density-voltage (I-V) curve measurements in a solar simulator. The maximum short-circuit current was 26 nA/cm², and the maximum open-circuit voltage was 0.44 V. The study discusses the fabrication issues and potential applications of the PV fiber, highlighting its potential as an optoelectronic sensor for monitoring light propagation in optical fibers.This paper presents the development and characterization of a photovoltaic (PV) optical fiber, where a dye-sensitized solar cell (DSC) structure is deposited on a claddingless optical fiber. The DSC consists of a ZnO:Al transparent current collector layer, a TiO₂ photoelectrode sensitized with a ruthenium dye, a gelatinized iodine electrolyte, and a carbon-based counter electrode. The fibers used were both silica and plastic optical fibers, made electrically conductive by coating with ZnO:Al using atomic layer deposition (ALD). The performance of the PV optical fibers was characterized using current density-voltage (I-V) curve measurements in a solar simulator. The maximum short-circuit current was 26 nA/cm², and the maximum open-circuit voltage was 0.44 V. The study discusses the fabrication issues and potential applications of the PV fiber, highlighting its potential as an optoelectronic sensor for monitoring light propagation in optical fibers.