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Thread: Need help finding part for dpss laser

  1. #1
    Join Date
    Jun 2006
    Location
    Charlotte, NC
    Posts
    1,117

    Default Need help finding part for dpss laser

    Please see pic below part is pointed to by arrow. I think its a VYO4 crystal but if so where do i get one thats like that to go on top of a standard c-mount 808nm diode


    This is the inside of one of my first dpss lasers. A transverse laser. awhile ago my old diode died and i just went to replace it but it looks like in all the shipping a part had got bumped loose and fell onto the crystal coated and breaking most of the coating off hendering it useless. This might be an item someone has laying around, if so let me know your cost. If not please point to where I can purchase

    Here is a few pics of the whole assembly including the KTP crystal



  2. #2
    Join Date
    Feb 2005
    Location
    Florida
    Posts
    802

    Default

    Yes, Thats a Vanadate crystal...

    Well, I can say I've never seen one mounted quite like that..
    Itsa shame they only mounted on 2 sides, But it could be to your advantage...
    Easy removal and mounting of a new one...

    I will suggest finding an old CNI pointer as the Nd:YVO4 in them
    were seperate too..altho , I think nowadays those are hard to find..
    I will look around my stuff and see what I have here this weekend.

    If one of those do work for you,
    You might consider a different mount for the Nd:YVO4 one that mounts all four sides..or..
    a 50um (the tiniest drillbit you have to just pierce thru) hole in a piece of 1/16" copper plate on the face towards the diode
    will help tremdously..see sams faq on that.
    as that one there is not very stable...
    It really needs to be heatsinked on all sides..
    Or get it to work and sell it off..Dunno.

    Did your old diode have a GRIN lens over the facet?
    From the looks of things, It looks like it was almost flush with the Vanadate crystal.
    "My signature has been taken, so Insert another here"
    http://repairfaq.ece.drexel.edu/sam/laserfaq.htm
    *^_^* aka PhiloUHF

  3. #3
    Join Date
    Jun 2006
    Location
    Charlotte, NC
    Posts
    1,117

    Default

    I will respond below to each of your statements

    Yes, Thats a Vanadate crystal...

    Well, I can say I've never seen one mounted quite like that..
    Itsa shame they only mounted on 2 sides, But it could be to your advantage...
    Easy removal and mounting of a new one...

    --Easy, is there such thing with lasers, is this crystal just as tedious as a KTP where it has to be mounted perfectly level with the output of the diode to achieve the beam

    I will suggest finding an old CNI pointer as the Nd:YVO4 in them
    were seperate too..altho , I think nowadays those are hard to find..
    I will look around my stuff and see what I have here this weekend.

    --errr, i lost my dead greenie pointer

    If one of those do work for you,
    You might consider a different mount for the Nd:YVO4 one that mounts all four sides

    --This would be imposible due to the other items on the other side already so close

    ..or..
    a 50um (the tiniest drillbit you have to just pierce thru) hole in a piece of 1/16" copper plate on the face towards the diode
    will help tremdously..see sams faq on that.
    as that one there is not very stable...
    It really needs to be heatsinked on all sides..
    Or get it to work and sell it off..Dunno.

    --I wont be selling it as it is one of my first two dpss lasers I am keeping for sentimental value, the 2nd one i have replaced the diode and all is well

    Did your old diode have a GRIN lens over the facet?
    From the looks of things, It looks like it was almost flush with the Vanadate crystal.

    --???? i dunno

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