Title :
Optical DPSK demodulator based on /spl pi/-phase-shifted fiber Bragg grating with an optically tunable phase shifter
Author :
Kim, Tae-Young ; Hanawa, Masanori ; Kim, Sun-Jong ; Hann, Swook ; Kim, Yune Hyoun ; Han, Won-Taek ; Park, Chang-Soo
Author_Institution :
Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol.
Abstract :
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
Keywords :
Bragg gratings; demodulation; differential phase shift keying; optical communication equipment; optical fibre communication; optical fibres; optical modulation; optical phase shifters; optical tuning; 10 Gbit/s; Yb3+-Al3+ codoped optical fiber; differential phase-shift keying; fiber Bragg grating; optical DPSK demodulator; optical tuning; phase shifter; Demodulation; Differential quadrature phase shift keying; High speed optical techniques; Optical interferometry; Optical pumping; Optical receivers; Optical refraction; Optical sensors; Optical variables control; Phase shifters; demodulator; differential phase-shift keying (DPSK); optically tunable phase shifter;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.881250
