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A novel amplitude-equalized all-optical clock recovery scheme

F. WANG1,2,* , X. L. ZHANG2, Y. YU2, Z. ZHANG2

Affiliation

  1. School of Mathematics and Physics, Chongqing Institute of Technology, Chongqing 400050, P. R. China
  2. Wuhan National Laboratory for Optoelectronics & School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China

Abstract

We presented a novel all-optical clock recovery scheme based on nonlinear polarization rotation (NPR) in a semiconductor optical amplifier (SOA) ring fiber laser for acquiring amplitude-equalized clock from input pseudo-random bit sequence (PRBS) return-to-zero (RZ) signal. Adjusting polarization direction of optical field in ring cavity, the reflective SOA together with the polarization beam splitter (PBS) can function as a saturable transmitter, where a high peak power is depressed and a low peak power is enhanced, amplitude ripple of recovered clock can be suppressed effectively. Clock amplitude jitter (CAJ) of recovered clock is lower than 1.5 % over a 25 nm tuning range.

Keywords

All-optical clock recovery, Mode-locked fiber ring laser, Birefringence, Nonlinear polarization rotation (NPR), Reflective semiconductor optical amplifier (RSOA).

Citation

F. WANG, X. L. ZHANG, Y. YU, Z. ZHANG, A novel amplitude-equalized all-optical clock recovery scheme, Optoelectronics and Advanced Materials - Rapid Communications, 2, 4, April 2008, pp.189-192 (2008).

Submitted at: Feb. 8, 2008

Accepted at: April 3, 2008