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Thread: Making surgical laser

  1. #1
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    Default Making surgical laser

    My idea is this: I would buy a 450 nm 5-7 W laser module with a driver. At a certain distance from the lens, in the focus of the beam, I would put an optical fiber. The power of the laser diode I would regulate by changing the current of the diode.
    I wonder if this idea is feasible in practice? Anything else to add and what if?
    Thanks in advance for your time and advice.

    Addresses for components.

    https://www.aliexpress.com/wholesale...aser+modul+7+w
    http://dentlasertip.com/products/bar...handpiece.html

  2. #2
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    ... no problem to assemble and use -- but enormous problems with approval and authorisations !!!

    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 offline Creaky Old Award Winning Bastard Technologist
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    With enormous problems getting the anesthetics required. Not to mention 4.5 watts of blue reduced to 3 watts out of the fiber when focused is on the low side for anything but certain kinds of dental surgery and internal coagulation. Its just not an optimal wavelength for soft tissue. Yes there are so called "skin surgery" devices sold illegally with overdriven blue diodes. What nobody tells you is they mainly generate scar tissue on the surface of the skin and more or less prevent future removal of the tats they are targeted for. There is a big difference between burning/scaring someone or doing actual useful surgery.

    Steve
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  4. #4
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    Sirona made a dental laser that has three frequencies: 445, 970 and 660 nm. The 445 nm frequency is as follows (Prospectus text):

    Blue wavelength – 445 nm
    The first Blue Laser for dental use. Blue laser light has a much higher absorbtion in soft-tissue (i.e. hemoglobin and melanin) than conventional infrared diode laser wavelengths (810nm, 940nm, 970nm). This leads to a much improved soft-tissue
    cutting efficiency which allows non-contact cutting, a first in dentistry for diode lasers. No fiber initiation is required and non-contact cutting means there is no need to remove tissue residue from the fiber during treatment. Due to the high degree of absorption in hemoglobin, the hemostatic effect is outstanding, helping during all surgical treatments, as well as within CAD/CAM workflow.


    Do you know what components I need to connect the laser beam and the bare fiber and the component to connect the pilot beam and the main beam? I am interested in the technical names with the characteristics and the company that makes them.

    Thanks in advance.

  5. #5
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    ... do you have the links to clearence and approval/allowance institutions?

    Where are you located? - using this for dental/medical treatment without approval ist the shortest way into jail in most countries !!

    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

  6. #6
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    I need it for experimantal work for PhD, not for human/dental usage

  7. #7
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    Post your proposal so I can read it. If it’s something I can help with I will. What university are you at and who is your PI?
    also send your reference list so I can read the references used in your proposal. I’m doing mine on second harmonic generation in metals.

    also introduce yourself and let us know where you are located. It helps people to be more willi g to help and you might find someone near you.

  8. #8
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    ... coupling a laser-focus into a 0,2mm-fiber and refocussing the fiber output to a spot diameter in the size of the fiber core (0,2mm or slightly finer) is no problem -- here you can see some of my setups for IR-laserdiodes:

    https://reprap.org/wiki/Laser_Cutter_Notes


    Did the same with blue 6W-diodes too -- with a 0,1mm fiber I've got roughly 4,5 Watt remaining after the fiber ... with a 0,2mm fiber something above 5 Watts ...

    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

  9. #9
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    TSI, Sorry, we get a fellow on two laser forums who is in probable need of psychological help. He's always trying to make "surgical lasers" for his skin and dental aliments, because he claims he cannot afford the services of a physician. In reality, it is some sort of self harm that he wants to do. He follows a pattern of popping on the forums with a new user ID and asking a similar question to yours. PM me with a PI name, location, and subject of research interest and help will flow. I have a good friend that services and repairs orphaned surgical lasers, legally. Between Him, Myself, and Kecked, we will be glad to help you, on a legitimate project. Medical fiber delivery, even for a research device, is a pretty specialized art, due to the need for consistent mode pattern and adjustable spot size.


    As I work for a research university, these days I'm ethically bound to check before I provide any "Advice", on human subject / animal subject/ cadaver based projects. Even in my spare time. Not that I acknowledge my employer has authority to do so in my spare time, but I think its a good idea.


    Steve
    Last edited by mixedgas; 01-06-2020 at 06:16.
    Qui habet Christos, habet Vitam!
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  10. #10
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    Dear friends. Thank you all for help and suggestions. I live in Serbia. Still I do not have a developed plan for research, but I saw how lasers work so I got idea to try some research with them. Buying one for try is not affordable to me, so I decided to try to make one.

    The work of each of us should be conscientious and everyone should be aware of the consequences of their work.
    If you think this discussion will lead to unintended consequences or risk to someone you can lock the topic.

    Greetings!

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