The refractive index is defined as the ratio of ____________.

One polarization maintaining fiber operates at a wavelength of 1.5 µm and has a beat length of 0.6mm. Its modal birefringence is given by _______.

The Nd:YAG LASER is a/an_______.

A multimode graded index fiber exhibits total pulse broadening of 0.2 µsec over a distance of 10Km. Estimate the maximum possible bandwidth assuming that there is no inter-symbol interference.

Which phenomenon does not let light rays escape an optical fiber?

What is signal attenuation in an optical fiber where P1=Input power and P0=Output power

The fiber gyroscope is an ______.

SONET is _________.

Silicon reach through avalanche photodiodes has _______.

For a step index fiber, relationship between numerical aperture (NA) and coupling efficiency (ηc) is ________.

Germanium photodiodes are generally not preferred in the optical fiber system because of _________.