Fully automated z-scan setup based on a tunable fs-oscillator (Conference Presentation)

Wolfgang Steiger; Peter Gruber; Maximilian Tromayer; Agnes Dobos; Markus Lunzer; Robert Liska; Aleksandr Ovsianikov

doi:10.1117/12.2289005

14 March 2018 Fully automated z-scan setup based on a tunable fs-oscillator (Conference Presentation)

Wolfgang Steiger, Peter Gruber, Maximilian Tromayer, Agnes Dobos, Markus Lunzer, Robert Liska, Aleksandr Ovsianikov

Proceedings Volume 10492, Optical Interactions with Tissue and Cells XXIX; 1049203 (2018) https://doi.org/10.1117/12.2289005
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

In recent years, two-photon polymerization (2PP) has emerged as a promising technology to structure customized biomaterials in regenerative medicine. Based on nonlinear absorption phenomena, 2PP allows rapid and flexible fabrication of fully three dimensional (3D) objects with sub-100-nm resolution. The ever-growing need for biocompatible photoinitiators (PI) necessitates knowledge of the spectral two-photon absorption (2PA) characteristics. Matching the laser wavelength to the peak of the 2PA spectrum of a particular compound can result in a significant increase of the PI’s performance. With the advent of tunable femtosecond laser systems the application window of 2PP has vastly expanded due to the broad spectral range available for structuring. To reveal the potential of a certain PI design the z-scan technique has become a standard method to measure the non-linear properties. We have developed a completely automated z-scan setup, which requires negligible user input for the characterization. It is based on the same system used for 2PP, which allows direct comparison of the PI absorption and the polymerisation performance. To ensure reproducibility and accuracy of measurements, our group developed an automated algorithm, which collects the required laser parameters before the scanning process. These are stored in a comprehensive library for every single measurement. Therefore, even large amounts of data are easily handled and correctly evaluated without the need to manually check each measurement. Our setup allowed us to reliably determine the absorption properties of newly synthesized PIs and adjust the structuring wavelength. The change in wavelength resulted in significant improvement of the structuring process.

Conference Presentation

Citation Download Citation

Wolfgang Steiger, Peter Gruber, Maximilian Tromayer, Agnes Dobos, Markus Lunzer, Robert Liska, and Aleksandr Ovsianikov "Fully automated z-scan setup based on a tunable fs-oscillator (Conference Presentation)", Proc. SPIE 10492, Optical Interactions with Tissue and Cells XXIX, 1049203 (14 March 2018); https://doi.org/10.1117/12.2289005

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Two photon polymerization

Absorption

Algorithm development

3D printing

Femtosecond phenomena

Laser development

Laser systems engineering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years