The special issue will feature in-depth research on the advancements and emerging trends in laser processing techniques for fiber and silica glass. It will highlight the latest developments in laser technology and its applications in telecommunication, sensing, and quantum technology. The issue will cover a wide range of topics, including the optimization of laser parameters, such as wavelength, power density, and pulse duration, for efficient processing of silica glass. Moreover, it will explore the fabrication of high-performance integrated devices using laser-induced techniques, investigating the effects of different laser types (continuous and pulsed) and pulse durations (nanoseconds, picoseconds, femtoseconds) on the properties and performance of the fabricated devices. Additionally, the special issue will shed light on the fundamental mechanisms underlying the photosensitivity of silica glass, elucidating the interaction between the laser and the glass material at a microscopic level. Furthermore, it will address the challenges associated with laser-induced damage in silica glass, providing insights into mitigating strategies and exploring novel approaches to enhance the resilience of the glass material.