At the destination, the optical signal must be converted back into an electrical signal. Gowar thoroughly investigates semiconductor photodiode detectors, specifically PIN photodiodes Avalanche Photodiodes (APDs)
: Converts electrical signals into light pulses using sources like LEDs or Semiconductor Lasers . optical communication system by john gowar pdf
Before the advent of dense wavelength division multiplexing (DWDM) and coherent detection, the fundamentals of fibre optics were already well-established. John Gowar captured these fundamentals with a unique blend of theoretical rigor and practical accessibility. At the destination, the optical signal must be
One cannot talk about an optical system without the source. Gowar details: At the destination