What makes different output power?

[Astralist]

Hi all
just wondering why a green laser can emit a different output power while they have a same pumping diode? :thinking:

for example:

ALL of 532nm Laserglow Hercules lasers are using 2.5W pumping diode, but the output power is vary between 200mW to 800mW.
if this only caused by current adjustment, then we can buy a cheap Hercules (200mW version $789), and then adjust the current so that we have 800mW output power, is'n it? :thinking:

also for 532nm PL-C from jetlasers, it using 2.5W pumping diode, but has a various output power.

 

[RA_pierce]

No.

DPSS laser systems are very complex and sensitive.
Not every cavity will produce the same output with equal pump power.

After the crystals are saturated, adding more power will either cause irreparable damage or even reduced output.

Since the conversion efficiency of DPSS systems varies from unit to unit, each laser must be "tuned" for the best output without over-saturating the cavity.

I suppose that's the simple explanation.