All-Optical Clock Extraction from 10-Gbit/s NRZ Data using modal interference in a two-mode fiber
All-optical clock extraction from a 10-Gbit/s NRZ input signal is demonstrated using modal interference in a two-mode fiber (TMF) and a mode-locked fiber ring laser. The TMF has a Mach-Zehnder configuration with two arms along the LP01 and LP02 regions. Using the difference in propagation delay between two arms, the non-return-to-zero (NRZ) signal is converted to the pseudo-return-to-zero (PRZ) signal. To obtain repetitive pulses as a clock signal from the PRZ signal, a ring laser with a semiconductor optical amplifier (SOA) is used. Subsequently, the measured clock-to-modulation component ratio (CMR) of the PRZ and carrier-to-noise ratio (CNR) of the clock signals are enhanced up to 38 dB and 40 dB, respectively, compared to that of the original NRZ signal. Also, the clock signal centered at 10 GHz has a low timing jitter of < 1.5 ps. It is expected that this method can be applied to high speed fiber optic systems of > 10 Gbit/s due to its small time delay between the LP01 and LP02 regions.
Sie-Wook Jeon Won-Bae Kwon Chang-Soo Park
Department of Information and Communications, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-gu, Gwangju, 500-712, Republic of Korea
国际会议
北京
英文
1-4
2009-09-01（万方平台首次上网日期，不代表论文的发表时间）