Q. 0.4 dB/km, 1.4 μm, 6 μm, 550MHz. Find threshold optical power for stimulated Raman scattering.

View solution

Q. Stimulated Brillouin scattering is mainly a ___________

View solution

Q. High frequency optical phonon is generated in stimulated Raman scattering.

View solution

Q. Stimulated Raman scattering occur in ___________

View solution

Q. Stimulated Raman scattering may have an optical power threshold of may be three orders of magnitude ___________

View solution

Q. What is dispersion in optical fiber communication?

View solution

Q. What does ISI stand for in optical fiber communication?

View solution

Q. For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be ___________

View solution

Q. The maximum bit rate that may be obtained on an optical fiber link is 1/3Γ.

View solution

Q. 3 dB optical bandwidth is always ___________ the 3 dB electrical bandwidth.

View solution

Q. A multimode graded index fiber exhibits a total pulse broadening of 0.15 μs over a distance of 16 km. Estimate the maximum possible bandwidth, assuming no intersymbol interference.

View solution

Q. What is pulse dispersion per unit length if for a graded index fiber, 0.1 μs pulse broadening is seen over a distance of 13 km?

View solution

Q. Chromatic dispersion is also called as intermodal dispersion.

View solution

Q. The optical source used in a fiber is an injection laser with a relative spectral width σλ/λ of 0.0011 at a wavelength of 0.70 μm. Estimate the RMS spectral width.

View solution

Q. In waveguide dispersion, refractive index is independent of ______________

View solution

Q. Intermodal dispersion occurring in a large amount in multimode step index fiber results in ____________

View solution

Q. After Total Internal Reflection the Meridional ray __________

View solution

Q. Consider a single mode fiber having core refractive index n1= 1.5. The fiber length is 12 m. Find the time taken by the axial ray to travel along the fiber.

View solution

Q. A 4 km optical link consists of multimode step index fiber with core refractive index of 1.3 and a relative refractive index difference of 1%. Find the delay difference between the slowest and fastest modes at the fiber output.

View solution

Q. A multimode step-index fiber has a core refractive index of 1.5 and relative refractive index difference of 1%. The length of the optical link is 6 km. Estimate the RMS pulse broadening due to intermodal dispersion on the link.

View solution