Results 1 to 4 of 4

Thread: Daniel Beam's Laser YT Channel

  1. #1
    Join Date
    Aug 2014
    Posts
    239

    Default Daniel Beam's Laser YT Channel

    Daniel Beam has been putting up videos for a few years which I find of interest, the last one driving a LBO crystal with 976 to produce 488 nm cyan. For his efforts, I'd like to see a higher YT subscriber count, so if members here might help him out, please subscribe to his YT page: https://www.youtube.com/user/w0003947




    _________________

  2. #2
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,350

    Default

    ... the setup for 488nm freq-doubling is interesting - but the "handhelds" with the 50W@975nm-diode are nothing more than insane and the same illegal nonsense as the 445nm-"Laserpointers", but with even more power and an invisible beam!

    Wait, until he get one more powerfull, like my actual 270Watt diode or maybe even stronger

    Viktor
    Aufruf zum Projekt "Müll-freie Meere" - https://reprap.org/forum/list.php?426
    Call for the project "garbage-free seas" - https://reprap.org/forum/list.php?425

  3. #3
    mixedgas's Avatar
    mixedgas is online now Creaky Old Award Winning Bastard Technologist
    Infinitus Excellentia Ion Laser Dominatus
    Join Date
    May 2007
    Location
    A lab with some dripping water on the floor.
    Posts
    9,543

    Default

    [QUOTE=VDX;357319]... the setup for 488nm freq-doubling is interesting

    That is just insane to do it that way without resonant cavity mirrors. Two flat mirrors, two curved mirrors, and a piezo to express the resonance would get him a 300-500% increase in blue power.


    Steve
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  4. #4
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,350

    Default

    ... I've tested yesterday with a green florescent glass-block and a blue 445nm laserdiode, if I'll get something different out - but stopped, when the glas starts fuming at roughly 10 Watts on a spot of 0,3mm ... maybe with mirrors and less power?

    Attached some images - first, below laser-threshold to see the focus inside of the galss ... then at roughly 2A/4W with some laser power ... and last with 5W/10A and the fumes, before I stopped ...

    Viktor
    Attached Thumbnails Attached Thumbnails Glasstab-445nm_0A.png  

    Glasstab-445nm_2A.png  

    Glasstab-445nm_5A.png  

    Aufruf zum Projekt "Müll-freie Meere" - https://reprap.org/forum/list.php?426
    Call for the project "garbage-free seas" - https://reprap.org/forum/list.php?425

Posting Permissions

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