What are the main factors for coupling fiber to light sources?
Coupling focal length, numerical aperture and end face reflection processing.Actually, the bigger thing is how do you make sure the location remains the same?!
The coupling of multimode fiber is easy, the adjusting frame of single-mode fiber needs to be fine, and the curing is a big problem
Indeed, as the upstairs said, the biggest problem is how to ensure that after the coupling is firm and reliable
