CW mode-locked source at 0.532 u

Using external second-harmonic generation (SHG) in Ba2NaNb5O15, a second-harmonic (SH) power of 550 mW, mode locked at 453 MHz has been demonstrated. Short- and long-term stabilities of better than ±5 percent peak-to-peak variation have been obtained at up to the 400- mW level. The maximum stable SH power was limited by absorption of the SH by the Ba2NaNb5O15SHG.