Optical Communication Practice Test 1

1. A single mode fiber has refractive indices n1=1.50, n2 = 2.23, core diameter of 8μ_m, wavelength = 1.5μ_m cutoff wavelength = 1.214μ_m. Find the radius of curvature?

2. The high index contrast enables the PCF core to be reduced from around 8 μmin conventional fiber to ___________

3. Chromatic dispersion is also called as intermodal dispersion.

4. Stimulated Raman scattering occur in ___________

5. Most of the optical power is carried out in core region than in cladding.

6. A multimode step index fiber has source of RMS spectral width of 60nm and dispersion parameter for fiber is 150psnm^-1km^-1. Estimate rms pulse broadening due to material dispersion.

7. Which is the most important velocity in the study of transmission characteristics of optical fiber?

8. How many propagation modes are present in single mode fibers?

9. For lower bandwidth applications ______________

10. Chromatic dispersion is also called as intermodal dispersion.