MERILYN SANTOS FERREIRA
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Artigo IPEN-doc 23928 Yb:KGW self-Raman laser with 89 cm(−1) Stokes shift and more than 32% diode-to-Stokes optical efficiency2020 - FERREIRA, MERILYN S.; WETTER, NIKLAUS U.We report on a Yb3+:KGW self-Raman laser operating at 1096 nm. A 100 μm fiber-coupled diode end-pumped configuration is used to generate a fundamental emission wavelength that strongly depends on internal resonator losses. Stokes emission at 1096 nm is achieved with a slope efficiency of 42 ± 8%, an optical conversion efficiency of more than 32% and a maximum output power of 4.5W for quasi-continuous operation (1 ms pulses). The explored Stokes conversion of 89 cm−1 shows excellent laser characteristics, indicating that this still little explored Stokes shift could pave the way to continuous-wave Raman frequency-comb lasers.