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	optical-electric-field-sensor optical e-field sensors perform signal measurement including accurate measurement of electric field intensity distribution and broadband frequency, which were not possible under conventional methods. in addition to applications mostly in research and product development, optical e-field sensors are used for identifying and resolving the causes of emc problems.
	optical remote antenna the receiver modulate and transmit non-modulated light sent from a transmitting station to a duplex tv relay station by using radio waves being received. it is epoch-making radio-wave receiver-transmitters where highly sensitive optical modulators are used.