In addition to beating conventional telecom fiber on loss and latency, hollow-core fibers are enabling new approaches to applications like sensing, fiber lasers and optical tweezers. HCFs offer a wealth of potential due to their unique optical properties, including ultra-low loss, low nonlinearity, and reduced latency. Researchers. For decades, optical fibers have relied on a solid glass core to guide light and have formed the backbone of global telecommunications. However, glass imposes a fundamental physical limitation because light travels through it approximately 30 percent slower than through air.