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All-fibre-optic clock recovery from non-return-to-zero format data

All-fibre-optic clock recovery from non-return-to-zero format data

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The authors demonstrate an all-optical clock recovery scheme from non-return-to-zero format data, with an asymmetric Mach-Zehnder interferometer and a mode-locked Er-doped fibre laser. Since this scheme consists of an all-fibre device, the clock recovery bandwidth can extend to the terahertz region. Such all-optical clock recovery techniques will find application in ultra-high speed all-optical communication systems.

Inspec keywords: laser beam applications; timing; Mach-Zehnder interferometers; digital communication; optical communication equipment; fibre lasers; laser mode locking; optical fibre communication

Other keywords: NRZ format data; asymmetric Mach-Zehnder interferometer; all-fibre-optic clock recovery; non-return-to-zero format data; mode-locked Er-doped fibre laser; ultra-high speed optical communication; THz clock recovery bandwidth

Subjects: Fibre lasers and amplifiers; Optical communication; Laser applications

References

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      • U. Feiste , D.J. As , A. Ehrhart . 18 GHz all-optical frequency locking andclock recovery using a self-pulsating two-section DFB-laser. IEEE Photonics Technol.Lett. , 106 - 108
    2. 2)
      • H.K. Lee , K.H. Kim , M.-Y. Jeon , J.T. Ahn , E.-H. Lee . All-opticalwavelength conversion using cavity dumped fiber laser with nonlinear optical loopmirror. Electron. Lett. , 791 - 792
    3. 3)
      • K. Smith , J. Lucek . All-optical clock recovery using a mode-locked laser. Electron. Lett. , 1814 - 1816
    4. 4)
      • Yao, M., Tang, H., Fukazawa, M., Zhou, J., Vahala, K., Newkirk, M., Miller, B.: `All-optical clock recovery from NRZ data using a nonlinear loop clockgenerator', WL11, Proc. OFC '96, February 1994, San Jose.
    5. 5)
      • K.H. Kim , M.-Y. Jeon , S.Y. Park , H.K. Lee , E.-H. Lee . Gain dependentoptimum pulse generation rates of a hybrid-type actively and passively mode-lockedfiber laser. ETRI J. , 1 - 14
    6. 6)
      • P.E. Barnsley . NRZ format all-optical clock extraction at 3.2 Gbit/s using two-contactsemiconductor devices. Electron. Lett. , 1253 - 1255
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