Laser welding of polymer micro-fluidic devices using novel diode laser sources

Anthony P. Hoult

doi:10.1117/12.540601

18 November 2003 Laser welding of polymer micro-fluidic devices using novel diode laser sources

Anthony P. Hoult

Proceedings Volume 5063, Fourth International Symposium on Laser Precision Microfabrication; (2003) https://doi.org/10.1117/12.540601
Event: Fourth International Symposium on Laser Precision Microfabrication, 2003, Munich, Germany

Abstract

The most widely used basic building block for high power diode lasers systems is a 19 emitter diode laser bar. For materials processing tasks, these may be used as single bars, can be built into vertical stacks or may be fiber coupled. For certain applications a line of light is preferred to a round beam and hence the use of fiber optic delivery may not be necessary. Straightforward optics can be used to convert the divergent output from this diode bar into a rectangle of line of focused light but the uniformity of the beam within this rectangle is a major problem. When diode bars are stacked vertically, this problem becomes 2 dimensional for anything other than a tightly focused beam. In particular, when a single bar line source is used to cover a large surface area by motion normal to the long axis of the beam, this non-uniformity creates fluctuations in intensity due to the separation between the individual emitters on the bar. This in turn causes processing problems when a laser line is used to seal multiple micro-fluidic devices. This work reports the use of a novel technique combined with conventional fiber delivered sources and novel laser line sources to tackle this problem.

Citation Download Citation

Anthony P. Hoult "Laser welding of polymer micro-fluidic devices using novel diode laser sources", Proc. SPIE 5063, Fourth International Symposium on Laser Precision Microfabrication, (18 November 2003); https://doi.org/10.1117/12.540601

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available