Frequency-Division Phase Random Optimization for High-Speed Arbitrary Optical Intensity Waveform Monitoring Using Opto-Electronic Finite Impulse Response Filters

We propose and demonstrate a high-bandwidth optical intensity waveform monitoring technique based on frequency-division phase random optimization (FD-PRO) using an opto-electronic finite impulse response (OE-FIR) filter. In this technology, phase random optimization (PRO) enable the estimation of the signal spectral phase. Frequency-division analysis (FDA) combined with PRO saves the iteration required for the optimization, accelerating the signal spectral phase estimation. FDA also facilitates the estimation of the signal spectral amplitude. Using FD-PRO, arbitrary optical intensity waveforms can be easily reconstructed without relying on high-speed digital signal processing. Experimental results reveal that the temporal waveforms are successfully reconstructed at 18-ps resolution.