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DLP4500NIR: application with NIR fs-laser

Luca Zanotto
Prodigy 120 points
Part Number: DLP4500NIR
Other Parts Discussed in Thread: DLP4500

Hi all,

I am interested in using a DMD for shaping a fs-laser beam in the NIR range (800nm). I am thinking to make use of the DLP4500NIR.

1. The main issue is related to the maximum power the DMD can resist: the average power hitting the surface will be around 500mW, but the pulses are very short in time (180fs) and a rate of 0.5kHz. The consequent fluence is so about 1mJ per pulse, resulting in very high peak power (MW). I already had problems due to heating with a DLP3000 in these conditions, so I wanted to ask if I can expect better performances with the DLP4500NIR

2. The easiest way for using the DLP4500NIR for projection is to get a LightCrafter 4500 and replacing the DLP4500 with the NIR one? There are other ways you can suggest? For example, do I have a way of using the DLP LightCrafter related with the DLP3000, to control the DLP4500NIR?

Thank you very much!

Luca

  • 0
    TI__Mastermind 30600 points
    Hi Luca,

    1. The DLP4500NIR is a larger device so you might be able to get better thermal performance. Your conditions are extreme however and not something that we have directly tested so it is impossible for me to say. One thing I will note is that the FQD variant package has a dedicated thermal pad to allow for better cooling. To use this though you'd have to design custom hardware (see answer to second question).

    2. Yes, we have had many customers do this and it is probably the easiest way. Of course, you'll need to be aware that modifying the Lightcrafter 4500 will void the warranty if you choose to swap the DMDs. You'll also need to make sure to purchase the right package variant of the DLP4500NIR, which is the FQE variant.

    Best,
    Paul
  • 0 in reply to Paul Goedeke
    Prodigy 120 points
    Hi Paul,
    I understand, thank you for your answer. I'll try to figure out which the best solution for me.
    Best,
    Luca