700mW is something of a tall order for a 405nm, though not impossible. A 5 minute duty cycle adds height to this already tall order. 500mW is more common. good luck
From personal experience a GOOD efficiency S0J6 diode in a copper module run at 450mA with a G2 lens in a Eudaimonium Phobos host can do >650mW and have an unlimited duty cycle.