laser diode cooling and running

[ionlaser555]

Hi

Just some small questions i won on eBay 25 laser diodes rated from 645 to 808nm all over 500mw and a 3 watt 808nm diode the diodes in the 25 lot are mainly 1 to 2 watt 808nm diodes . i was wondering to run the 3 watt diode what size tec should i use and what size heat sink should be used the diode will be run for 20 mins at a time or longer .



I also have a regulated power supply with current and voltage limiting can this be suitable to run the diodes here is a link to the site it came from.

http://www.rapidonline.com/productinfo.aspx?&tier1=Electrical+%26+Power&tier2 =Power+Supplies&tier3=Bench+PSUs&tier4=0-30V+Triple+output+DC+regulated+PSU&moduleno=77154& catRef=85-1707



the model on the site is the same in every way but the variable current is only 0 to 2.5 and 0 to 30 volts but mine is 0 to 3 amp 0 to 30 volts



thanks


-ben

[Laser Ben]

I assume you won the lot from Hurrursciences? If so, I feel sorry for you

As for cooling, I would just mount them on a metal block and use a 10 watt or so TEC to cool them. You can probably do without the TEC and just run a heatsink.

[ionlaser555]

I assume you won the lot from Hurrursciences? If so, I feel sorry for you

As for cooling, I would just mount them on a metal block and use a 10 watt or so TEC to cool them. You can probably do without the TEC and just run a heatsink.

what could i use the collaminate the beam from the diode and is the pus from the above link suitable to run laser diodes


thanks

[ionlaser555]

small heat sink for a 1 watt T0-9 diode .

[mixedgas]

sizing a heat sink is based on a number measured in degrees c per watt, which you get off a data sheet for the diode or a similar diode. There is no guessing about it.

math time:
http://www.kpsec.freeuk.com/components/heatsink.htm

Steve

[ionlaser555]

sizing a heat sink is based on a number measured in degrees c per watt, which you get off a data sheet for the diode or a similar diode. There is no guessing about it.

math time:
http://www.kpsec.freeuk.com/components/heatsink.htm

Steve

Hi

I have got a large heat sink now and 2 tecs i was going to mount the diode on a small aluminium block and then to the tec what should i use to attach the diode to the aluminium . can i use a 1mm thick thermal pad or something eals and do you know were a could get a cheap 9mm laser diode heatsink for a 1-2 watt T0-9


thanks

ben

[danielbriggs]

Merideth Instruments sell a 9mm diode housing + collimator.
I'd use thermal compound personally over a thermal pad; but they do the same thing

Dan

[ionlaser555]

Merideth Instruments sell a 9mm diode housing + collimator.
I'd use thermal compound personally over a thermal pad; but they do the same thing

Dan

Hi

thanks for the reply and the place to get 9mm holder

i was going to use thermal compound but it can be messy and the diode is an open one so i dont want to mess up the face of the diode but i will try it the diode is a 3 watt 808nm.

[danielbriggs]

Just make sure you get some goggles while messing with 808 - especially at those powers!

[ionlaser555]

Just make sure you get some goggles while messing with 808 - especially at those powers!

Will OD 6+ goggles be ok
.If anyone knows a place to get a cheap TEC driver could they PM me or post a comment on here please because i need one for 2x 138 watt tecs and a 500 watt tec

This is a picture of the diode 3 watt diode and the 2 808nm 2 watt 9mm cans.