Temporal pulse shaping using fiber laser technology: nanoscaling for flexible industrial laser material processing

Rajesh S. Patel; Michelle Lynn Stock; Zaza Sartania; Jim M. Bovatsek; Alan Y. Arai; Heinrich Endert

doi:10.1117/12.486528

19 February 2003 Temporal pulse shaping using fiber laser technology: nano-scaling for flexible industrial laser material processing

Rajesh S. Patel, Michelle Lynn Stock, Zaza Sartania, Jim M. Bovatsek, Alan Y. Arai, Heinrich Endert

Author Affiliations +

Proceedings Volume 4830, Third International Symposium on Laser Precision Microfabrication; (2003) https://doi.org/10.1117/12.486528
Event: LAMP 2002: International Congress on Laser Advanced Materials Processing, 2002, Osaka, Japan

Abstract

On the basis of highly efficient Yb:fiber amplifiers, a new technology platform for compact and nearly maintenance-free laser sources from the femtosecond to the nanosecond time scale has been developed, allowing their application-customized use in industrial laser material processing. The core of this technology is the patented use of multimode fibers with TEM₀₀ output characteristics, enabling high and efficient amplification while maintaining high quality of the output beam. First, we review the fiber laser amplifier developments in the femtosecond pulse regime. Then, we present for the first time a picosecond seed source, Yb fiber amplifier laser design. Next, we present a completely new laser seeder/amplifier design, enabling online temporal tuning of laser pulses between 4 and 20 ns without changing pulse energy by utilizing high-speed control circuitry to adjust pulse duration, repetition rate and pulse energy independently. Pulse length can be optimized to process a given dimension of a sample structure that needs to be modified. Pulse shape can be controlled to produce almost rectangular pulses with <1.5 ns rise times. The resultant pulses can be transported by a polarization-maintaining delivery fiber for easy integration and use in material processing applications. Finally, we describe a few examples of micromachining using pulses from this new, flexible, fiber-based nanosecond laser source.

Citation Download Citation

Rajesh S. Patel, Michelle Lynn Stock, Zaza Sartania, Jim M. Bovatsek, Alan Y. Arai, and Heinrich Endert "Temporal pulse shaping using fiber laser technology: nano-scaling for flexible industrial laser material processing", Proc. SPIE 4830, Third International Symposium on Laser Precision Microfabrication, (19 February 2003); https://doi.org/10.1117/12.486528

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