Abstract: Systems and methods of laser based additive manufacturing are provided, in which solid polymer material strands are continuously received and have their surfaces melted by laser source(s). Such a system may include a feeder configured to continuously feed, two or more solid polymer material strands, a first guiding unit comprising two or more conduits to continuously receive and guide the two or more solid polymer material strands from the feeder towards a connecting point, a first laser unit, comprising one or more laser sources, each source is directed to deliver a specified laser beam with respect to adjacent surfaces of two adjacent strands towards the connecting point.