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The calculated spectral intensities of the output harmonics under different PM modulations. (a) and (b) 1-bit PM coding 01010101… with M = 2 and T = 1 μs. (c) and (d) 2-bit PM coding 00-01-00-01-… with M = 2 and T = 1 μs. (e) and (f) 2-bit PM coding 00-01-10-11-… with M = 4 and T = 2 μs. (g) and (h) 2-bit PM coding 11-10-01-00-… with M = 4 and T = 2 μs.
