Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

574nm 36 mW Yellow Laser

Yeah, having the anode tied to the case makes a handheld more complicated. It's too bad the only driver we have to mitigate this is the Blitz Linear from Survival. Good luck on your build.
 





Survival laser soldered a Blitz driver to a brass ring for me with the right diameter to fit inside my host, I'm waiting for that and some thin strips of heat sink adhesive tape to run down the sides of the 575 nm 20 mm module to isolate it from the host, will report when I have all of the parts in hand and assembled..
 
Since you are using a linear driver for this DPSS laser build, it will likely have a lot of waste heat which that tiny driver may not be able to handle. I am very curious if you are able to make this work for one of these 575nm lasers. The Vf of the diode has been shown to be between 1.5 to 1.6 volts, while your supply voltage will be 4.2 volts at least. I have reservations about that driver being used for this in a handheld unit. I will be very interested in how this all eventually works out for you.
 
Gonna try, to reduce the waste heat some, depending upon the amount of dropout, I can spread some of it to a silicone diode in series with the driver to drop more voltage.
 
Yeah, you can drop ~0.7 volts per diode, but you will want to use at least 3 amp if not higher current ones. I hope it works out for you. I think I would have used a buck driver and tried to isolate the module from the rest of the build. Good luck.
 
Yep, agreed, I always at least double the needed current rating with diodes, prefer to go 4x. I could use other diodes with lower voltage drop, but in this case, I want a higher voltage drop so would use silicon.
 
The higher power version include heatsink below the driver.


crKSTd.jpg
 
Last edited:
Alaskan said:
I can get 50 mw out of mine at about 2 amps current into the diode.
Click to expand...
At 2amps it’s overdrive, it has rollback on that current.

I kept mine 1.3A to be on a safe side.

New units must have 2W diodes inside
 
Last edited:
Mine doesn't roll back until about 2.6 amps with this unit, it is overdrive, agreed. I don't mind, I have three and can loose one if I push it too far. I don't run it that long anyway, could happen though.
 
Like to just receive mine. Maybe they send the higher power for waiting. Does the crystal look the same. If so we can just get higher power pump diodes. There are 5w fiber diodes the could deliver a good 100mw yellow and modulate well. They are used for telecom. I’ve seen them ad diode and driver in one psckage. They are digital drivers though. Maybe TIL is done right but not analog. See eBay/

https://www.ebay.com/itm/C-mount-Pa...213145?hash=item1edbc61e99:g:ZCoAAOSwTOtapyo6

What is funny is we all got use to no fan noise from the ion days but as the current goes back up towards ion currents, the fans coming back....I can’t run anything at 2amps that doesn’t heat dramatically. Wondering if I should put a 2-3ohm 5w resistor in line with the diode tonsuck up some voltage to transfer the heat off the power transistor. It doesn’t start to work until 5v these diodes are aroun 2v. Maybe a slight higher voltage on the transistor but then load transferred to the resistor would work. Have to figure the value of the resistor to make it work and not current limit too much.
 
Last edited:
^^^ I am waiting also for two pcs.. I must have paid too late to get in on existing stock.. had to re-send PPal-- had addy wrong--my bad!
 
You must log in or register to reply here.


Back
Top