The Laser Welding of Chicken Myocardium with Using of Protein Solders

The presents the results of laser welding of chicken myocardium. The welding used a continuous diode laser with a wavelength lambda = 970 nm and temperature feedback. The laser power varied in the range of 0.2-5 W to stabilize the welding temperature at similar to 57-62 degrees C. Solders based on water dispersion of bovine serum albumin (BSA 25% w/w), water dispersion of indocyanine green (ICG 0.1% w/w) + BSA 25% w/w and ICG 0.01% w/w + BSA 25% w/w were used. Laser welded seams were examined by optical microscopy and X-ray microtomography. There was shown no defects and the uniformity of the weld formation. Based on the measured absorption spectra of the solders, their optical characteristics were calculated for the radiation lambda = 970 nm. The tensile strength of laser welded seams was 0.09 +/- 0.04 MPa (BSA), 0.16 +/- 0.11 MPa (BSA+ICG 0.01%) and 0.18 +/- 0.08 MPa (BSA+ICG 0.1%).