In future high-speed optical time-division-multiplexed (OTDM) networks, clock recovery (CR) at tributary rates from the multiplexed data stream will be an essential process as it synchronizes operations such as demultiplexing and 3R data regeneration at each network node. Many CR technologies have been investigated, including phase-locked loop (PLL) [
1,
2], nonlinear optical loop mirror (NOLM) [
3], cross-grain modulation (XGM) [
4], two-photon absorption [
5], and so on. Elector-absorption modulator (EAM) is a promising device in high-speed optical signal processing because of their low polarization dependence, easy handling, and high integrability. In this paper, we report an EAM and 40-Gbit/s electric time-division-multiplexed (ETDM) demultiplexer [
6] for 10 GHz clock extraction from a 16×10-Gbit/s OTDM signal.