Widely repetition-tunable 200 fs pulse source using a Mach–Zehnder-modulator-based flat comb generator and dispersion-flattened dispersion-decreasing fiber

Abstract

By combining a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) with a dispersion-flattened dispersion-decreasing fiber, femtosecond pulses have been generated from a cw light. Near-Fourier-transform-limit picosecond pulses generated from the MZ-FCG were compressed into femtosecond order by pulse compression. Our system enables flexible tuning of the repetition rate and pulse width, because those depend on the driving signal of the MZ-FCG. Pulse trains of 200 fs width were continuously and stably generated without mode hopping, with a repetition rate range from 5 to 17 GHz. Our system consists of a modulator and compression fiber; thus, the configuration is simpler and more stable.

Dynamic optical arbitrary waveform generation and detection in InP photonic integrated circuits for Tb/s optical communications

“…Additional tailoring of the RF drive signals can improve OFC flatness [31]. To further broaden the OFC, additional phase modulators can be added in series or the DEMZM output can be spectrally broadened to several terahertz by nonlinear pulse compression in dispersion decreasing fiber (DDF) [32,33].…”

Generation of 140 fs pulse train with widely tunable repetition rate through cascaded fibre compression techniques

“…Adiabatic soliton compression in dispersion decreasing fibre (DDF) has been very attractive for achieving femtosecond pulses with low noise and high quality [12]. Trains of 200 fs pulses with repetition rates up www.ietdl.org to 17 GHz were generated by using a 2 km length of dispersion flattened dispersion decreasing fibre (DF-DDF) as a non-linear compressor [13]. However, adiabatic soliton compression usually requires large lengths of DDF, frequently several kilometres, and a wide operating wavelength range which is very difficult to achieve in DDF [14].…”

10 GHz pulse source for 640 Gbit/s OTDM based on phase modulator and self-phase modulation

“…So far, the shortest pulse width obtained by EO modulation schemes is around ~2 ps at 10-40 GHz repetition rates [11,12]. A subpicosecond pulse width, as required for 640 Gbit/s OTDM, has necessitated an additional non-linear pulse compression stage [13][14][15]. However, in most of these demonstrations, the generated pulse is often associated with a pedestal which prevents its use for high-speed OTDM data.…”