emergence of ultrafast laser pulse generation has triggered incredible progress across a wide array of disciplines, encompassing industrial applications, energy technologies, life sciences, and beyond. Expanding compact femtosecond fiber oscillators into new visible wavelengths has long been a challenging yet fervently pursued goal in laser science. Over the years, remarkable advancements have been made in developing wavelength-tunable, high-power, Q-switched and mode-locked visible fiber lasers.