Page 4 of 4 FirstFirst 1234
Results 31 to 35 of 35

Thread: using LSR (laser speckle reducer) with a pico projector, ideas about design need

  1. #31
    Join Date
    Jul 2018
    Posts
    51

    Default

    What do you mean by pumping diodes? Aren't pumping diodes the IR diodes in DPSS lasers?
    What about fibers for the visible spectrum diodes?

    And would you use singlemode fibers are multimode? Although I will be using low power single mode laser diodes I'm not sure a single mode fiber will affect the speckle pattern much.

  2. #32
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,060

    Default

    ... I meant the "pigtailed" pumping diodes for fiber-lasers:

    Click image for larger version. 

Name:	120Watt-FS mit 9W-Dioden.jpg 
Views:	6 
Size:	164.6 KB 
ID:	54454

    Viktor

  3. #33
    Join Date
    Jul 2018
    Posts
    51

    Default

    Okay. But for diode lasers, would you use singlemode fibers are multimode? Although I will be using low power single mode laser diodes I'm not sure a single mode fiber will affect the speckle pattern much.

  4. #34
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,060

    Default

    ... better use multimode fibers -- but this means only: search fibers with a core-diameter of 50 microns or more ...

    Viktor

  5. #35
    Join Date
    Jul 2018
    Posts
    51

    Default

    Got it. Will post update when I get somewhere with this.
    Somene else on reddit commented why he thinks the fiber is reducing speckle. It may have to do with the thermal movement doing the job of the mechanical movement in speckle reducers. Whatever that means.
    Last edited by joec; 08-16-2018 at 12:20.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •