METHOD AND DEVICE FOR GENERATING ELECTROMAGNETIC WAVE

摘要

PROBLEM TO BE SOLVED: To provide a electromagnetic wave generating method and a device in which the frequency is stably varied. SOLUTION: An output beam of a light source 1 whose frequency is f1 is modulated by a modulation signal whose frequency is Δf by an optical modulator 2 and two side band waves are generated and amplified by an optical amplifier 3 and the side band waves whose frequency difference is NΔf are generated by a single mode optical fiber 4 based on the ternary nonlinear optical effect. Then two side band waves whose frequency is f1±NΔf are produced by a multistage optical frequency filter 5 and subject to optical heterodyne detection at a photo-detector 7, then an electromagnetic wave whose frequency is 2NΔf is generated.