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A suitable low noise bench power supply for a 1mw laser?

dominik.kania

Hi guys,

 

I'd appreciate your advice. Having reviewed some of the topics on the forum, I wanted to check if you think if the Tenma bench power supply will suit my purpose / or if you envisage any issues.

 

The situation is this: I am looking to do some prototyping using a rather sensitive 1mw laser diode with the specs from the diode's test run below:

image

Will Tenma 72-2630 do the job, or should I be looking for a bench power supply with better resolution an less noise and ripple? My key concern is avoiding any damage to the laser / other low-voltage electronics I work with.

 

There is an astonishing number of seemingly great bench power supplies out there, and with very wide price brackets, so your advice / experience with this unit would be much appreciated.

 

Dominik

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    I'm not sure exactly what you want to do but I suspect that this kind of power supply is unsuitable.

     

    It doesn't claim to be low noise and its 90W outputs are way too beefy for precise control at mW levels.

     

    If you want to be able to precisely set currents and/or remotely control the test voltage or current then look at a Keysight or Keithly SMU:

    Keithley 2401 (Farnell 2074737) £3090

    Keysight B2901A (Farnell 2580169) £3858 (on promotion with "free" scope)

     

    These instruments allow you to set maximum voltage and current and offer decent remote control capability via network interfaces.

     

    Keysight do a cheaper box which has no front panel display or controls and connects to a PC via USB (U2722A, Farnell 1577811, £1737)

     

    Otherwise, if you can build  your own, tell us a bit more about the diode and exactly what you want to do with it and it would be quite easy to design a circuit to precisely deliver the right current with power limiting if required.

     

    MK

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  • 0

    I'm not sure exactly what you want to do but I suspect that this kind of power supply is unsuitable.

     

    It doesn't claim to be low noise and its 90W outputs are way too beefy for precise control at mW levels.

     

    If you want to be able to precisely set currents and/or remotely control the test voltage or current then look at a Keysight or Keithly SMU:

    Keithley 2401 (Farnell 2074737) £3090

    Keysight B2901A (Farnell 2580169) £3858 (on promotion with "free" scope)

     

    These instruments allow you to set maximum voltage and current and offer decent remote control capability via network interfaces.

     

    Keysight do a cheaper box which has no front panel display or controls and connects to a PC via USB (U2722A, Farnell 1577811, £1737)

     

    Otherwise, if you can build  your own, tell us a bit more about the diode and exactly what you want to do with it and it would be quite easy to design a circuit to precisely deliver the right current with power limiting if required.

     

    MK

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