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DLP4500NIR: Coating for high power application

Yi Xue
Prodigy 10 points
Part Number: DLP4500NIR
Other Parts Discussed in Thread: DLP7000,

We used a DLP7000 in the lab. Because we focused about 100mW femtosecond laser pulse (wavelength 1030nm, pulse duration ~300fs, rep rate 1MHz), the pixels in the focus were broken. We want to buy a new DMD for this application. DLP4500NIR has the correct wavelength coating. My question is what is the thermal damage threshold of DLP4500NIR, and whether it is possible to have special coating for high power application? Thank you.

Best,

Yi

  • 0
    TI__Mastermind 30600 points
    Hi Yi,

    The DLP4500NIR's thermal damage threshold is specified as "Thermally Limited" and the implications of this are discussed in section 7.5 of the datasheet. It walks through how to calculate the various temperatures of the DMD. For long term operation, you'll want to keep the temperature below 65C. If you can keep the temperature lower than that, even better.

    As far as special coatings, we do not offer custom options, sorry. In the case, the damage would likely occur directly to the mirrors anyway and the coating does a great job passing the wavelength you're using with very little loss.

    Hope that helps,
    Paul