5-mm-resolution optical-frequency-domain reflectometry using a coded phase-reversal modulator.

Network analysis optical-frequency-domain reflectometry is demonstrated with what is to our knowledge the highest resolution reported to date (5 mm in fiber) and a dynamic range of 73 dB (electrical). The system uses a novel 13-bit Barker-coded phase-reversal optical modulator, a high-speed photodiode, and a commercial microwave vector network analyzer.