The fire detection optical fiber, formally known as the flame detection optical fiber, is an essential component of a flame detection system used to transmit the optical signal from the furnace flame to the detection probe. Typically, this fiber has two ends: a measurement end and an output end; based on its light-guiding material, it can be classified into quartz optical fibers and glass optical fibers. Depending on the flame spectral distribution characteristics of different fuels during combustion, flame detection optical fibers can be categorized into ultraviolet (UV), visible light (VL), and infrared (IR) flame detection optical fibers.

Quartz optical fiber is an optical fiber with a core made of pure quartz glass possessing a high refractive index; it operates over a wide range of wavelengths, and both ultraviolet and visible light fire detection systems predominantly utilize quartz optical fibers.

The quartz optical fibers developed by the company have been scaled up for mass production and are widely used in flame detection systems for boilers in thermal power plants. Through independent R&D efforts and the integration of advanced international technologies, the company now possesses state-of-the-art domestic production technologies and equipment for non-communication optical fibers. This enables the company not only to provide customers with high-quality, cost-effective optical fiber product lines but also to offer comprehensive technical support services and tailored system solutions.

Quartz optical fiber is fabricated by bundling quartz optical fibers; its spectral transmission ranges are 200–1100 nm and 350–2100 nm; the core diameter and number of branches can be customized according to customer requirements. This quartz optical fiber features a wide core diameter range, excellent optical performance, a large numerical aperture, as well as superior mechanical strength and bending resistance.