Slight overclock question.

[Voldy356]

So, I was thinking, is it safe to run the Mitsubishi ML501P73 diode with 1A in cw mode (I'd run it 5-10 seconds on, minute off duty cycle, if that works.)
I know I'd need adequate cooling, but I'm just scared of frying the diode.
Thanks.

 

[Encap]

Look at the data sheet here: http://www.mitsubishielectric.com/semiconductors/content/product/optical/laser/ml501p73_p1245.pdf
According to it max cw is 500mW and max operating current is 800 mA so...
Note on data sheet says: "Note1: The maximum rating means the limitation over which the laser should not be operated even instant time. "

DTR's Laser shop ---- shows 1A will do 900mW and is max current DTR suggests---cw but not without adequate heat sinking other than just a moment for testing. https://sites.google.com/site/dtrslasershop/home/diodes/mitsubishi-635nm-500mw-diodes

Use LPF Search there are several threads on that diode.

 

[Alaskan]

Yep, looks more than a slight "overclock" to me. I know some of those diodes can be pushed close to 1 watt without failing, but I would expect the life to be severely shortened at 1 amp. I have a pointer with that diode in it which puts out close to 1 watt, just under and hasn't died yet.

 

[Voldy356]

Look at the data sheet here: http://www.mitsubishielectric.com/semiconductors/content/product/optical/laser/ml501p73_p1245.pdf
According to it max cw is 500mW and max operating current is 800 mA so...
Note on data sheet says: "Note1: The maximum rating means the limitation over which the laser should not be operated even instant time. "

DTR's Laser shop ---- shows 1A will do 900mW and is max current---cw but not without adequate heat sinking other than just a moment for testing. https://sites.google.com/site/dtrslasershop/home/diodes/mitsubishi-635nm-500mw-diodes

Use LPF Search there are several threads on that diode.

Aight, thanks for the info.

 

[paul1598419]

I have one doing well over 1 watt and it has been running for a few years now. These 638nm red diodes have terrible divergence specs, so I don't use it as much as other lasers I have just because of that. These diodes are quite inexpensive, so even if you lost one it wouldn't set you back much. One of these days I plan on using a cylinder lens pair to get some control over the wild divergence of the slow axis on these diodes, but it is way back on my list of things to do.

 

[Lifetime17]

Hi,
I also have a few Mitsu 500's at over 1W and are still running after 3 years. These diodes aren't as fussy as the Oclaro 700'S , and the 500's can take a licking.
Rich

 

[BowtieGuy]

I agree, Rich and Paul, I've had my 1+ Watt working since 2014 and still going.
Like Paul mentioned, mine also doesn't get a lot of use lately due to terrible divergance.

 

[Encap]

Tough diode with good heat sinking and installed in a host if you are OK with the bad divergence.

Not sure if you meant assembled in module and host or just running it as a bare diode.
Be very careful not to fry it, if just powering up the bare diode.

 

[Lifetime17]

Hi
If divergence is an issue use a beam expander with minimal loss of power
Rich

 

[Voldy356]

Tough diode with good heat sinking and installed in a host if you are OK with the bad divergence.

Not sure if you meant assembled in module and host or just running it as a bare diode.
Be very careful not to fry it, if just powering up the bare diode.

I have it in a standard heatsink and a c6 host. At 800mA the diode barely hear up at all.