A planar optical waveguide of length = 3 cm is observed to have a transmitted optical power of 5 mW. When the waveguide is cut in half, the optical power at the output of the remaining half is...

A planar optical waveguide of length = 3 cm is observed to have a transmitted

optical power of 5 mW. When the waveguide is cut in half, the optical power

at the output of the remaining half is measured to be 5.5 mW.

(a) What is the loss coefficient of the waveguide in cm-1?

(b) What is the loss of the waveguide in dB/cm?