Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: Homebuilt Manganese Vapour Laser (MnVL)

  1. #11
    Join Date
    Nov 2017
    Location
    Odessa, Ukraine
    Posts
    82

    Default

    Today I've loaded this laser tube with lead. The buffer gases are the same, operating temperature is much lower. Optimal PRR is low too. I saw lasing on 722 nm, it is still quite visible. It is a bright red spot with magenta tint. Output power was quite low, possibly some tens of mW. It couldn't burn anything when focused. Lasing exists till Helium pressure that exeeds 100 Torr. Lead also sputters quickly throughout the tube making the OC dirty. Also it is quite difficult to make adequate pictures of the laser beam. The camera doesn't pass over the colour correctly.
    Attached Thumbnails Attached Thumbnails DSCN6494.JPG  

    DSCN6493.JPG  

    DSCN6489.JPG  

    DSCN6496.JPG  

    DSCN6499.JPG  

    DSCN6500.JPG  


  2. #12
    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
    9,200

    Default

    Quote Originally Posted by Laserbuilder View Post
    Today I've loaded this laser tube with lead. The buffer gases are the same, operating temperature is much lower. Optimal PRR is low too. I saw lasing on 722 nm, it is still quite visible. It is a bright red spot with magenta tint. Output power was quite low, possibly some tens of mW. It couldn't burn anything when focused. Lasing exists till Helium pressure that exeeds 100 Torr. Lead also sputters quickly throughout the tube making the OC dirty. Also it is quite difficult to make adequate pictures of the laser beam. The camera doesn't pass over the colour correctly.
    Next stop, Bismuth, at 472 nm.. You'll need a tiny amount of another metal, like the manganese, or a iodide or bromide in there to break up the bismuth dimer... Strontium is 445 nm, but usually needs a halide to be efficient. I'm sure you know about the tiny amount of pure hydrogen trick, when using halides.



    Steve
    Last edited by mixedgas; 05-02-2019 at 14:20.
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  3. #13
    Join Date
    Dec 2007
    Location
    Stockholm, Sweden
    Posts
    520

    Default

    Very impressive! Thanks you for teachning us how its done!

Posting Permissions

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