Yes you are probably right.
Peltiers have a maximum differential temperature (Delta T.) which means that they can have upto a difference of usually 50C between the hot side and the cold side. This delta T is usually only obtained when there is no "load". (I.e. It is pumping no heat.) However as the amount of heat pumped rises versus the cooling power of the peltier, the delta T is decreased.
In this application, seems as the output power of the laser would probably be limited by factors other than the temperature, delta T probably doesn't need to be anywhere near the specification of the peltier. I think an 80Watt peltier running at around 10-20Watts would be more than enough. This would increase efficiency and should still be able to get sub-zero temperature, allowing the laser diodes to be pushed. The fact that the "hot side" of the peltier is going to be water cooled, would mean that the delta T is pushed to it's full potential.
Can anybody explain to me the limiting factors of a laser diode, as well as how long a112D Sony DRU-190S laser diode could live when pushed to 500mW with this kind of cooling ?
Also does anybody know what current would be required to run one of these lasers at around 500mW ? I don't have a LPM and I don't intend on spending that much money for one.
Thanks.
Peltiers have a maximum differential temperature (Delta T.) which means that they can have upto a difference of usually 50C between the hot side and the cold side. This delta T is usually only obtained when there is no "load". (I.e. It is pumping no heat.) However as the amount of heat pumped rises versus the cooling power of the peltier, the delta T is decreased.
In this application, seems as the output power of the laser would probably be limited by factors other than the temperature, delta T probably doesn't need to be anywhere near the specification of the peltier. I think an 80Watt peltier running at around 10-20Watts would be more than enough. This would increase efficiency and should still be able to get sub-zero temperature, allowing the laser diodes to be pushed. The fact that the "hot side" of the peltier is going to be water cooled, would mean that the delta T is pushed to it's full potential.
Can anybody explain to me the limiting factors of a laser diode, as well as how long a
Also does anybody know what current would be required to run one of these lasers at around 500mW ? I don't have a LPM and I don't intend on spending that much money for one.
Thanks.