Old 07-05-2018, 07:01 PM #1
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Smile Can I use this Power Supply to run and test Laser Diodes?

Will this Power Supply be a good choice to run and test Laser Diodes?
Tekpower TP3005N Regulated DC Variable Power Supply, 0 - 30V at 0 - 5A
Adjustable outputs: 0-30V and 0-5A Variable controls for both current and voltage outputs
Input voltage: 110V
Regulation: CV <= 0.02% + 10 mV
Load Regulation: CV <= 0.02% + 5mV,
Ripple noise: CV <= 100 mVp-p
Protection: Current Limit
Environment: 0-40C, relative humidity < 80%
Can I use this Power Supply to run and test Laser Diodes?-azgq_9855_800x600.jpg

Can I use this Power Supply to run and test Laser Diodes?-tp3005ne.jpg

https://www.amazon.com/gp/product/B0...1K8OCGMX&psc=1


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Old 07-05-2018, 09:34 PM #2
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Default Re: Can I use this Power Supply to run and test Laser Diodes?

I am not familiar with this particular power supply, but from the stated specs, it could work. It depends on how well it will handle transients like turning the supply on and off and changing the current limit as laser diodes should be current limited. If you have an oscilloscope you should be able to test it for spikes that might kill a laser diode.
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Old 07-06-2018, 01:40 AM #3
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Default Re: Can I use this Power Supply to run and test Laser Diodes?

Virtually all of them are okay, provided you power on (and power off) the PSU at zero volts and zero current and no load, then connect the load and adjust things tenderly. The power cycle is what can get you... or accidentally turning the pot too far.

An oscilloscope and test load setup would be required to verify the power cycles are safe.
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Old 07-06-2018, 02:58 AM #4
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Default Re: Can I use this Power Supply to run and test Laser Diodes?

It’s not a good practice and I’ve lost hundreds in diodes that way. Do it right.
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Old 07-06-2018, 03:20 AM #5
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Default Re: Can I use this Power Supply to run and test Laser Diodes?

I have tested many dozens of diodes using my tested power supplies and if you are careful and take your time these is no reason you should lose diodes to them. I have diode heat sinks and use these to test diodes for wavelength and threshold current. I have come across only two that were bad out of the box, but it wasn't because of my power supplies. I also use transistor sockets to connect to diodes so once they have been binned, they are returned in the same shape as I received them.
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Thor H Dual Power 445nm, 438 mW & 1648 mW
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473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
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532nm lasers X4 75mW- 140mW
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
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Old 07-06-2018, 03:42 AM #6
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Default Re: Can I use this Power Supply to run and test Laser Diodes?

Lots of my lose wS from transient turn on. I bought a supply from mjpa. Turned out had a cap on the pout put that would let sthe voltage go to full on turn on. Gun shy now.
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30ghz-pin diode
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1064 dpss
976-diode
875-diode
808-diode

671-dpss
660-diode
650-diode
642-diode
638-diode
632-hene

510-diode
515-diode
520-diode
532-dpss
565-dpss
575-dpss
505-diode
495-diode
473-dpss
470-diode
465-diode
462-diode
455-diode
450-diode
445-diode

405-diode
266-dpss q switched 25 up
195-hg lamp

Ocean Optics HR2000. 200nm-1100nm
Ocean Optics LLS-1
Oceanview full
BW TEK-2000nm/800nm/400nm moved gratings
Beckmann Du-25/30
Raman 473/532/660/785nm
Zeiss Confocal Microscope fitted with Raman 785nm
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Old 07-06-2018, 05:37 AM #7
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Default Re: Can I use this Power Supply to run and test Laser Diodes?

You never connect the PS until it is on and the voltage and current are at minimum. At the very least, if you are certain that your PS is free from spikes, you can turn it on connected as long as the voltage and current are turn down all the way. But, that is only if you are certain of this. I have to measure diodes by the score at times and not having a system in place to do it would take days to accomplish. I don't worry about my supplies as I have gone through them with a scope and ensured they are free from transitions like you have described. It works.
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405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

473nm 50 mW BWB-10-OEM DPSS
477nm 127 mW 501B
488nm 135 mW EDC Sharp diode
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
493nm 120 mW 501B
502nm 110 mW 501B Lifetime
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
574nm OptLaser DPSS Laser 36 mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
638nm 1 watt Cyprus II
635nm 100mW pointer
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
Ocean Optics USB2000 Spectrometer
B&W TEK BTC100 Spectrometers X3
Scientech Vector S310 with AC2500 10 Watt LPM/ Hyperion 6 Watt & 20 Watt LPM/ Radiant X4 3.7 Watt LPM
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Old 07-06-2018, 11:27 AM #8
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Default Re: Can I use this Power Supply to run and test Laser Diodes?

Wouldn't trust any of those PS types in the
OP until tested with a DSO for Turn ON/OFF
and running/controlling spikes/transients.

Jerry
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