1. The electric field of a light wave propagating in a medium of re fractiv e index сan be expressed a s E = 10N/C cos(1015t+ 5.106y)i Determine the following: propagation constant, period, velocity in the medium, refractive index of the medium and magnetic field associated with this electric field. 2a.(i) A photon of wavelength 1.06µm is combined with a photon of wavelength 0.85µm to create a new photon whose energy is the sum of energies of these two photons. What is the wavelength of the new photon? (ii)How many photons are emitting from the laser diode in 5 minutes if its power is 1mW? 2b. A 1.55-um digital communication system operating at 1 Gb/s receives an average power of –40 dBm at the detector. Assuming that 1 and 0 bits are equally likely to occur, calculate the number of photons received within each 1 bit.

1. The electric field of a light wave propagating in a medium of re fractiv e index сan be expressed a s E = 10N/C cos(1015t+ 5.106y)i Determine the following: propagation constant, period, velocity in the medium, refractive index of the medium and magnetic field associated with this electric field. 2a.(i) A photon of wavelength 1.06µm is combined with a photon of wavelength 0.85µm to create a new photon whose energy is the sum of energies of these two photons. What is the wavelength of the new photon? (ii)How many photons are emitting from the laser diode in 5 minutes if its power is 1mW? 2b. A 1.55-um digital communication system operating at 1 Gb/s receives an average power of –40 dBm at the detector. Assuming that 1 and 0 bits are equally likely to occur, calculate the number of photons received within each 1 bit.