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Schematic of the system with the microscopy image of the thulium-doped large-mode area photonic crystal fiber (TD-LMA-PCF) cross-section and the splice point between the TD-LMA-PCF to a polarization-maintaining 30/250 silica fiber.
Schematic of laser scanner setup for the topographical engineering of hydrogels.
(a) Slope efficiency curve of the main amplifier; (b) TD-LMA-PCF beam profile at different output powers; (c) Spectra of main amplifier seed (pre-amplifier 2 output) and main amplifier output at different pulse energies. Inset: Main amplifier output pulse measured using a fast photodetector.
(a) Compressor efficiency and CVBG 1 leakage at different main amplifier output powers; (b) Autocorrelation trace of recompressed pulse at 1.7 W and 4.6 W average powers. Inset: Spectra at corresponding output powers after the compressor.
(a) M2 measurement at the highest pulse energy after compressor. Inset: Beam profile at the highest pulse energy after compressor; (b) Power stability of the compressor output over 2 hours.
Microscopy image of microchannels abricated on the hydrogel.
(a) Schematic of laser scanner setup on dried hydrogel films. Inset: Schematic of foam formation due to water absorption within film causing laser-induced expansion. (b) Scanning electron microscopy images of foamed hydrogel films with decreasing photon flux (scanning speeds of 100, 120 and 150 mm/s at 4 W) from left to right.