Discuss the below:
Fiber optics - temporal broadening by a multimode fiber.
Q: How significant is the broadening of a nsec pulse laser in the optical fibers? Their fiber was quartz, 2.5 m long, 600 um in diameter, with numerical aperture in air of 0.22. Let's assume you sent an idealized pulse of 337 nm light (from the N2 laser) with zero temporal width into the fiber. Calculate the minimum and maximum flight times using ray approximations and thereby report the broadening due to the fiber geometry alone. Is this significant for nsec pulses?