If you couple a laser into a fiber (assuming there is no leakage of laser light), would it be considered a Class I laser? The light that exits the end of the fiber doesn't really exhibit "laser-like" properties any more as it diverges, right?
Let's say you inject the light from a Class IIIB 30mw laser into a fiber. At the tip, you measure 20mw of light (the rest of the light is lost inside the coupler/fiber, none of which escapes). 20mW, if emitted from the laser itself, would be considered Class IIIB (>5mW and less than 500mW). But how do you account for the fact that the light is no longer coherent?
Let's say you inject the light from a Class IIIB 30mw laser into a fiber. At the tip, you measure 20mw of light (the rest of the light is lost inside the coupler/fiber, none of which escapes). 20mW, if emitted from the laser itself, would be considered Class IIIB (>5mW and less than 500mW). But how do you account for the fact that the light is no longer coherent?