. Suppose a laser diode changes its emis-sion wavelength by 0.5 nmC. The un-shifted emission wavelength is 1310nm, and the fiber's zero-dispersionwavelength is 1300 nm. The laser'slinewidth is 1.5 nm,

and a temperatureshift of 10°C causes an increase in theoutput wavelength. Compute the de-crease in the fiber's 3-dB optical band-width arising from this temperature in-crease. Assume that only materialdispersion is important.