We propose a self-clocking method based on in-band clock pilot insertion at the transmission data signal. The method can achieve clock recovery without the need for an ultrafast phase comparator and a phase-locked loop in the receiver. We demonstrate fast synchronization, low timing jitter, and a highly stable recovered clock from a $160\mathrm{Gbit}∕\mathrm{s}$ optical time-division multiplexing data signal after a $51\mathrm{km}$ fiber transmission. The recovered clock shows no patterning effect with a clock dynamic range of $10\mathrm{dB}$ for error-free operation of $160\text{\hspace{0.17em} to \hspace{0.17em}}40\mathrm{Gbit}∕\mathrm{s}$ demultiplexing with a power penalty of $1.1\mathrm{dB}$ .