Kim, DH Kim, SH Jo, JC Choi, SS 2024-01-21T14:43:56Z 2024-01-21T14:43:56Z 2021-09-04 1999-12 0021-4922 https://pubs.kist.re.kr/handle/201004/141817 A prescaled 10 GHz clock recovery from a 40 Gbps time-division-multiplexed (TDM) optical signal has been demonstrated with a low-frequency-oscillator-free phase-locked loop (PLL) circuit based on four-wave-mixing in a semiconductor optical amplifier, 40 GHz optical PLL using a 10 GHz mode-locked fiber ring laser as a clock pulse was stable over 5 h within 10 KHz lock-in frequency detuning of 40 GHz TDM optical signal. English JAPAN J APPLIED PHYSICS CLOCK RECOVERY Phase-locked timing extraction from 40 Gbps optical signal using harmonically mode-locked Er-doped fiber ring laser Article 10.1143/JJAP.38.6766 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, v.38, no.12A, pp.6766 - 6767 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 38 12A 6766 6767 scie scopus 000084519700040 2-s2.0-0033343042 Physics, Applied Physics Article CLOCK RECOVERY clock recovery optical communication time division multiplexing optical amplifiers phase-locked loops