Widely Tunable O-Band High-Power Laser

High-power O-band (1260–1360 nm) lasers with fine wavelength tunability are essential for advancing photonic technologies. Fine tunability is particularly crucial for applications such as optical frequency comb (OFC) generation and optical coherence tomography [1]. In OFCs, precise wavelength control ensures stable and coherent comb lines for high-resolution metrology, spectroscopy, and high-capacity telecommunication networks [2]. Despite their importance, the development of high-power, finely tunable O-band lasers has faced significant challenges, including the lack of effective active media and temporal stability. Overcoming these limitations is vital for unlocking the full potential of O-band systems in diverse applications. In this work, we present cutting-edge advancements in photonic integrated circuits (PICs) and fiber optics to develop a compact hybrid laser with Watt-level output power and fine wavelength tunability across a 35 nm range.