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Osram PL530 - Tiny 530nm OPSL

vasimv

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Btw, what heater temperature should be? I'm planning to use the module with ambient 28..30C temperature, do i need the heater or peltier element to cold it to 25C?

Trying to find cheap 405nm laser with good coherency and got a crazy idea. It is possible to replace the infrared laser diode with higher frequency one to get beam with doubled (if 1064nm diode is used in the module) frequency from it? As i understand, PLNN crystals can work at very broad ranges with different efficiency, say if i get 20..30% efficiency with 400..420nm output that will be good enough for me.
 



RedCowboy

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Btw, what heater temperature should be? I'm planning to use the module with ambient 28..30C temperature, do i need the heater or peltier element to cold it to 25C?

Trying to find cheap 405nm laser with good coherency and got a crazy idea. It is possible to replace the infrared laser diode with higher frequency one to get beam with doubled (if 1064nm diode is used in the module) frequency from it? As i understand, PLNN crystals can work at very broad ranges with different efficiency, say if i get 20..30% efficiency with 400..420nm output that will be good enough for me.
You need to heat sink the module and power the heater to achieve a balance where it works well, I have played with mine but not much, as for changing out the LD in such a tiny device much less aligning it you can only try and see, maybe better to start from scratch after some more research.
 

Anthony P

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Place on heatsink. Bottom only needs to contact. Use constant VOLTAGE source to set heater to about 2V +or-0 .25V. Adjust till it works best. There is a 1or2 second lag in adjustment till you see results. It is normal for intensity to fluctuate for a few seconds when first powered on.

As for changing the diode, even a brain surgeon would have problems.
 

Alaskan

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Careful with that heat sink on the bottom, it is silicone glass, chips easy.
 

diachi

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Btw, what heater temperature should be? I'm planning to use the module with ambient 28..30C temperature, do i need the heater or peltier element to cold it to 25C?

Trying to find cheap 405nm laser with good coherency and got a crazy idea. It is possible to replace the infrared laser diode with higher frequency one to get beam with doubled (if 1064nm diode is used in the module) frequency from it? As i understand, PLNN crystals can work at very broad ranges with different efficiency, say if i get 20..30% efficiency with 400..420nm output that will be good enough for me.
It's not a direct doubled diode laser, so no. It's an 808nm pump coupled to an OPS chip which lases at 1060nm and is doubled to produce 530nm.
 

Dragonsired1

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Hi,
yesterday I received my PL 530 and seems it doesn't work. Feeding 1.9 V to heater and 400 mA to diode and nothing. Is there possible it can be fault from manufacturer? Is it very sensitive device to exceeding recommended ratings? Is there any way telling what could go wrong?

Thanks
 
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Anthony P

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I have used the pl530 in a couple of projects successfully. That does not make me an expert, but I will try to help. I need more info though. Does it work at all or is it completely dead? I assume you verified wiring, supplies, and used heatsink. The word "tiny" is in this title for a reason. Soldering was difficult, I had a loose connection once. Another problem I had was a rapid power drop. That was caused by pre-driver current being too low. They are fragile until properly mounted. A more detailed description of your problems would be helpful, and pics are always nice.
 

Dragonsired1

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I have used the pl530 in a couple of projects successfully. That does not make me an expert, but I will try to help. I need more info though. Does it work at all or is it completely dead? I assume you verified wiring, supplies, and used heatsink. The word "tiny" is in this title for a reason. Soldering was difficult, I had a loose connection once. Another problem I had was a rapid power drop. That was caused by pre-driver current being too low. They are fragile until properly mounted. A more detailed description of your problems would be helpful, and pics are always nice.
It doesn't work at all. Yes I checked everything on my MM and everything is powered correctly. Soldering was challenging but current flows, and there's voltage across PTC so wiring should be ok. I basically recreated same circuit as shown in first post with two LM317 . Attached is picture my circuit. The laser module is mounted on heatsink with thermal conductive goo.
 

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Anthony P

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Check that white wire on your jumper to laser. It should be ground for heater. I have to go to work now, but will study it more later. In the mean time, here is data sheet.
 

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Dragonsired1

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Check that white wire on your jumper to laser. It should be ground for heater. I have to go to work now, but will study it more later. In the mean time, here is data sheet.
I switched white wire to the GND and nothing happened. Is it possible I somehow fried the PTC? Thx for datasheet. Also current through PTC is around 50 mA
 

lazeristasUVISIR

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For initial tests I would suggest drop the LD current to 250-300 mA. Then scan the heater voltage to get output. I think mine were ~2.3 V
 

Dragonsired1

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For initial tests I would suggest drop the LD current to 250-300 mA. Then scan the heater voltage to get output. I think mine were ~2.3 V
Dropped current to around 300 mA. The voltage dropped to 1.7 V then I increased it to 2.2 V but no change.
 

lazeristasUVISIR

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Just checked with mine - works without a heater ( open leads) ; the laser starts to shine ~130 mA (voltage on LD ~1.6V)
 

Dragonsired1

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Just checked with mine - works without a heater ( open leads) ; the laser starts to shine ~130 mA (voltage on LD ~1.6V)
That's also what I was thinking that it should work even without heater... and I ranged current from like 50mA to 400 mA and nothing. More and more I start thinking that it is actually dead. But apart of no light I have no other clue what is wrong with it.
 

Anthony P

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I used that exact circuit for one project, only with a pot to vary diode current. As I recall, the circuit acts funny until input voltage is at least 7 or 8 volts. I run mine off a 9V 2A regulated wall adapter.
 

Dragonsired1

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I used that exact circuit for one project, only with a pot to vary diode current. As I recall, the circuit acts funny until input voltage is at least 7 or 8 volts. I run mine off a 9V 2A regulated wall adapter.
I have 12V 1A wall adapter.
 




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