Clear View on Optical Detectors in Ultravoilet Visible and Infrared Portions of the Electromagnetic Spectrum in a Light Wave Communication
B. Bala Subbanna

B. Bala Subbanna, M.E., (Ph.D.), Assistant Professor, Department of Electrical Engineering, College of Technology, Debre Markos University, Debre Markos, Ethiopia
Manuscript received on April 05, 2013. | Revised Manuscript received on April 11, 2013. | Manuscript published on April 15, 2013. | PP: 41-45 | Volume-1 Issue-5, April 2013. | Retrieval Number: E0228041513/2013©BEIESP
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Abstract: Many optical fiber communication applications require the use of optical radiation detectors. Examples are optical radar, monitoring of laser power levels for materials processing, and laser metrology. There are different types of optical fiber detectors are available, these optical fiber detectors are covering the ultraviolet, visible, and infrared portions of the electromagnetic spectrum. Optical detectors convert incoming optical energy into electrical signals. Thee are two main types of optical fiber detectors are available, such as photon detectors and thermal detectors. Photon detectors produce one electron for each incoming photon of optical energy. The electron is then detected by the electronic circuitry. Thermal detectors convert the optical energy to heat energy, which then generates an electrical signal.. The incident light changes the characteristics of the detector and changes the current flowing in the circuit. The output signal is then the change in voltage drop across the load resistor.
Keywords: Optical detectors readout concepts, Thermal detectors.