Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Laser for melting silica

Laser for melting silica

Laser for melting silica

I am interested in building a "tool" using a laser to melt (actually soften a small area of) silica glass. Today I heat this glass with an electric arc to accoplish my needs. The downside of this is that I have limited control over this arc. The silica I work with is small in size (about .02 inches wide). Controlled heating is critical for consistency.
What laser would work best and where can I get one?
John C.

RE: Laser for melting silica

A small Carbon Dioxide (CO2) laser perhaps 20 to 50 Watts would melt silica materials very effectively. The laser beam can be 'focussed' using simple lenses to <100 micrometers so that should fit with your size requirements. These size lasers start at $5,000 so to try the idea it may be best to approach a University elec-eng or physics department that has these devices and can advise on their (safe) use. See the IOP website www.iop.org for listings of which UK departments to approach; TIPTOP or OSA for international sites. If youv'e got money and want some of the system built up for you I can recommend a laser systems manufacturer/systems integrator GSI Lumonics Inc.
email: eat-more-toast@ieee.org

RE: Laser for melting silica

"simple lenses" means salt (humidity problems) or ZnSE (toxic). But other than that, I guess the CO2 is your only valid choice for this kind of job; probably you arelooking for a pulsed CO2, laser, with "light" pulses in the microsecond range, and repetitions of maybe hundred or couple of hundred pulses/ second.

You can:

- control the actual "length" (time) of the light pulse
- the repetition frequency
- directly the focalization of the laser beam

to achieve a broad spectrum of thermal effects

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close