A simplified Doppler frequency shift (DFS) measurement approach based on Serrodyne optical translation is reported. sawtooth wave with high amplitude sent to one phase modulation arm of a Mach–Zehnder modulator in conjunction the transmitted signal implement translation, as well frequency-shifted carrier. The echo applied other modulator. lower first-order sidebands from are selected by an band...

Abstract An optical frequency comb (OFC) frequency-division multiplexing dispersive interference multichannel distance measurement method is proposed. Based on the OFC interference, wide spectrum divided into multiple channels using a wavelength-division multiplexer. Under existing light source and spectrometer, single system can realize six of high-precision parallel absolute measurement. The ...