Chinese Optics Letters, Vol. 2, Issue 8, 445 (2004)
Simultaneously compensating tunable CD and adaptive PMD using two different nonlinearly chirped fiber Bragg gratings
Li Yu*, Xiaoguang Zhang, Guangtao Zhou, Yumin Liu, Jianzhong Zhang, Lixia Xi, and Bojun Yang
- School of Science, Beijing University of Posts and Telecommunications, Beijing 100876
Experimental research of simultaneous tunable chromatic dispersion (CD) and adaptive polarization mode dispersion (PMD) compensations in optical fiber communication system was reported. Two different nonlinearly chirped fiber Bragg gratings fabricated through the equivalent chirp technology were adopted in the experiment. One of the gratings was used as CD compensator, with a tunable dispersion range from 300 to 600 ps/nm. The other made of photosensitive polarization maintaining fiber was used as a tunable delay line of PMD compensator, which provided a varying amount of differential group delay (DGD) from 40 to 110 ps. Our experiment was operated at 10-Gb/s non-return-to-zero (NRZ) system and the results showed that the eye pattern recovery is excellent after both PMD and CD are compensated. Especially, the power penalty at a bit error rate (BER) of 10^(-9) is about 1 dB.