Mode‐locked diode laser‐based two‐photon polymerisation. Issue 2 (1st January 2020)

• Record Type: Journal Article
• Authors: Surkamp, N.; Zyla, G.; Gurevich, E.L.; Klehr, A.; Knigge, A.; Ostendorf, A.; Hofmann, M.R.
• Is Part Of: Electronics letters. Volume 56:Issue 2(2020)
• Page Start: 91
• Page End: 93
• Publication Date: 2020-01-01
• Subjects: high‐speed optical techniques -- polymerisation -- semiconductor lasers -- laser mode locking -- optical saturable absorption -- optical pulse compression -- two‐photon processes -- integrated optics -- optical waveguides; mode‐locked diode laser‐based two‐photon polymerisation -- ultrafast light source -- ultrashort laser pulses -- direct laser writing -- segmented metallisation -- waveguide integrated saturable absorber -- fundamental repetition rate -- suspended lines -- support cuboids -- 3D structure -- frequency 383.1 MHz -- time 440.0 fs -- power 160.0 mW; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2019.2385
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : 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.