Here is a listing on ebay claiming 10 watts of output power at 450 nm from a single diode. While cooled using a TEC, I do not believe this diode is CW, instead it must be PWM. The listing mentions PWM, so that must be how they get the 10 watts?
https://www.ebay.com/itm/An-Enduranc...e/254448464155
https://www.ebay.com/itm/An-Enduranc...e/254448464155