“…Nevertheless, the output power is rather restricted, mainly because of the poor thermal conductivity generally faced by the above Raman crystals. Compared to conventional Raman crystals, a chemical vapor deposition (CVD) diamond has a high Raman gain coefficient (17 cm/GW @1 μm), a very wide transmission spectrum (> 0.23 μm), an ultra-high thermal conductivity (2200 W/mK), and a large Raman shift (1332.3 cm −1 ) and is well recognized as an outstanding Raman crystal [23][24][25] . Actually, for the past decade, diamond Raman lasers have experienced significant progress in characteristics, such as high-power, high-brightness, and various emission wavelengths [26][27][28] .…”