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Typically experimental results: the fundamental RF spectra with the resolution of 1 Hz and the span of 100 Hz for three lasers (a) λ2 and (b) λ1 and λ3. The fundamental repetition rates of λ1–3 are 6.86678, 6.17917, and 5.60533 MHz, respectively. (c) Wideband RF spectrum up to 1 GHz and (d) oscilloscope traces up to 2 μs for the laser λ2.
