SC - U6DB - Fiber Optics Communication

write 600 words that respond to the following questions with your thoughts, ideas, and comments. Be substantive and clear, and use examples to reinforce your ideas.

An optical fiber is essentially a waveguide for light where it links the optical transmitter (The light source) to the optical receiver (A photodetector). The light source on the transmitter may be an LED (Light Emitting Diode) or a Laser (Light amplification by stimulated emission of radiation). Explain why it is difficult to couple the light from the light source into a fiber (at the transmission side) with a very high efficiency? In your opinion, is there a difference between LED efficiency and Laser efficiency?