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Optical DPSK demodulator based on /spl pi/-phase-shifted fiber Bragg grating with an optically tunable phase shifter

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7 Author(s)
Tae-Young Kim ; Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol. ; Hanawa, M. ; Sun-Jong Kim ; Swook Hann
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We propose and demonstrate a novel optical differential phase-shift keying (DPSK) demodulator with an optically tunable phase shifter. The proposed DPSK demodulator is implemented by using a pi-phase-shifted fiber Bragg grating and an Yb3+-Al3+ codoped optical fiber. A 10-Gb/s DPSK signal was successfully demodulated by the proposed demodulator, showing clearly open eye diagrams as well as bit-error-free performance. Moreover, the phase of delayed optical signal can be tuned by the phase shifter that is controlled by a pumping light at around 980nm

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 17 )

Date of Publication:

Sept. 2006

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