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We demonstrated optical filter characterization using optical frequency sweep with optical single sideband modulation technique, where the frequency shift range was 2GHz-10GHz. Undesired sidebands generated in the single sideband modulation due to electric phase errors can be compensated by automatic synchronized bias control. Fine pass band structures of a dual-section FBG were precisely measured, where the bandwidths of the pass bands were 440MHz.

Optical filter characterization by using optical frequency sweep technique with a single sideband modulator