Open AccessMode‐locked diode laser‐based two‐photon polymerisation
Author(s) -
Surkamp N.,
Zyla G.,
Gurevich E.L.,
Klehr A.,
Knigge A.,
Ostendorf A.,
Hofmann M.R.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.2385
Subject(s) - laser , materials science , diode , optics , ultrashort pulse , optoelectronics , laser diode , ti:sapphire laser , waveguide , laser power scaling , physics
In this Letter, the authors present the construction of three‐dimensional microstructures by two‐photon polymerisation induced by ultrashort pulses of a mode‐locked diode laser. The ultrafast light source is based on a diode laser with segmented metallisation to realise a waveguide integrated saturable absorber. It is subsequently amplified and compressed resulting in ultrashort laser pulses of 440 fs length and average output power of 160 mW at a fundamental repetition rate of 383.1 MHz. These pulses are coupled into a customised two‐photon polymerisation setup. A series of suspended lines were fabricated between support cuboids for testing the process behaviour. A 3D structure with complex features was polymerised to demonstrate the high potential for mode‐locked diode lasers in the field of direct laser writing.