i brought a 4 watt 808nm diode off of ebay from a company called junktronix. the plan was to put it
in my blue dpss laser as the diode in there had burnt out/stopped working. any way i have installed the
new 808nm diode put power on it and am getting a dull red beam from the diode an nothing after the crystals,
i guessing this is because the wavelenght of the pump diode isn't 808nm? should the pump diode hae a red beam?
chers dean