Is the real lightsaber made of laser?

From a scientific point of view, is a lightsaber really possible? Some blue laser pointer and plasma scientists have given their answers. It is actually wrong to think that the "light saber" used by the Jedi in the movie is a "laser sword". Because the "light" of the lightsaber is essentially different from the "laser" in the traditional sense, as one of the most important inventions in human history, the laser has always been regarded as the "fastest knife" and "the most accurate ruler". ", "the brightest light." Let us consider using lasers to make lightsabers. Imagine a beam of light from a powerful laser source. An interesting feature of laser is that it is collimated, that is, it propagates in a straight beam with almost no divergence. For example, an ordinary flashlight, no matter how you improve its optical system, there will always be a beam of light spreading during its movement, but the coherent beam of the laser spreads surprisingly small. The laser can maintain its "power" and be used to cut or destroy other things. From this point of view, lasers are ideal for making lightsabers.