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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) ÁýÁßÇü ºÐ»ê Á¦¾î ½Ã½ºÅÛ¿¡¼­ NRZ º¯Á¶ Çü½Ä ´ë RZ º¯Á¶ Çü½Ä
¿µ¹®Á¦¸ñ(English Title) NRZ versus RZ Modulation Format in Lumped Dispersion Managed Systems
ÀúÀÚ(Author) À̼º·Ä   Á¶¼º¾ð   Seong-Real Lee   Sung-Eon Cho  
¿ø¹®¼ö·Ïó(Citation) VOL 12 NO. 02 PP. 0328 ~ 0335 (2008. 02)
Çѱ۳»¿ë
(Korean Abstract)
ÁýÁßÇü ºÐ»ê Á¦¾î (DM; dispersion management)¿Í ±¤ À§»ó °ø¾×±â (OPC; optical phase conjugator)°¡ Àû¿ëµÈ WDM Àü¼Û ½Ã½ºÅÛ¿¡¼­ NRZ Çü½Ä°ú RZ Çü½ÄÀÇ ½Ã½ºÅÛ ¼º´ÉÀ» ºñ±³ÇÏ¿´´Ù. OPC¸¸ Àû¿ëµÈ °æ¿ì¿¡¼­º¸´Ù OPC¿Í °áÇÕÇÑ ÁýÁßÇü DM ±â¼úÀÌ Àû¿ëµÈ WDM Àü¼Û ½Ã½ºÅÛ¿¡¼­ NRZ¿Í RZ Çü½ÄÀÇ ´« ¿­¸² ÆгÎƼ (EOP; eye opening penalty) ¸ðµÎ Å©°Ô °³¼±µÇ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. WDM ä³ÎµéÀÇ ÃÖ»óÀÇ ¼º´É °³¼±À» À§ÇÑ ÁýÁßÇü DM¿¡¼­ RZ Çü½ÄÀÇ °æ¿ì ÃÖÀûÀÇ Àüü À׿© ºÐ»ê·® (NRD; net residual dispersion)Àº °æ·Î Æò±Õ ºÐ»ê °è¼ö°¡ 0¿¡ °¡±îÁöµµ·Ï ¸Å¿ì ÀÛ°Ô °áÁ¤µÇ¾î¾ß ÇÏ´Â ¹Ý¸é NRZ Çü½ÄÀÇ °æ¿ì¿¡´Â ¸Å¿ì Å©°Ô °áÁ¤µÇ¾î¾ß ÇÏ´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù. ±×¸®°í OPC¿Í °áÇÕÇÑ ÃÖÀûÀÇ NRD·Î ¼³°èµÈ ÁýÁßÇü DM¿¡¼­ NRZ Çü½ÄÀÇ °æ¿ìº¸´Ù RZ Çü½ÄÀÇ °æ¿ì ´õ Å« EOP °³¼± È¿°ú¸¦ ¾òÀ» ¼ö ÀÖ´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù. ÀÌ´Â OPC¿Í °áÇÕÇÑ ÁýÁßÇü DMÀÌ RZ Çü½Ä Àü¼Û¿¡¼­ ¹ß»ýµÇ¾î ¼º´ÉÀ» ÀúÇϽÃÅ°´Â ä³Î ³» 4-±¤ÆÄ È¥ÇÕ Çö»ó(IFWM; intrachannel four-wave mixing)°ú ä³Î ³» »óÈ£ À§»ó º¯Á¶ (IXPM; intrachannel cross phse modulation) Çö»ó¿¡ ÀÇÇÑ ½ÅÈ£ ¿Ö°îÀ» ¾ïÁ¦½ÃÅ°±â ¶§¹®ÀÌ´Ù. Áï º» ³í¹®¿¡¼­ Á¦¾ÈÇÑ OPC¿Í °áÇÕÇÑ ÁýÁßÇü DMÀº RZ Çü½ÄÀÇ WDM Àü¼Û ½Ã½ºÅÛ¿¡¼­ ä³Î ³» ºñ¼±Çü¼º °¨¼Ò¿¡ Å« È¿°ú°¡ ÀÖ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
¿µ¹®³»¿ë
(English Abstract)
The system performance of NRZ format in WDM transmission system with lumped dispersion management (DM) and optical phase conjugator (OPC) is compared with that of RZ format. It is confirmed that eye opening penalty (EOP) of both NRZ and RZ format in WDM transmission system having lumped DM combined with OPC are greatly improved than those in WDM system with only OPC. The optimal net residual dispersion (NRD) in the case of RZ format is decided to so small value that path-averaged dispersion coefficient become almost zero, while that in the case of NRZ format is decided to larger value, for the best improvement of overall WDM channels. It is also confirmed that EOP in the case of RZ format is more improved than that in the case of NRZ format in lumped DM with optimal NRD. This is resulted from that lumped DM combined with OPC suppress the signal distortion due to intrachannel four-wave mixing (IFWM) and intrachannel cross phase modulation (IXPM). Consequently, lumped DM combined with OPC proposed in this paper is effective technique to mitigate intrachannel nonlinearities in WDM transmitting RZ format.
Å°¿öµå(Keyword) NRZ/RZ modulation format   lumped dispersion manage   IFWM   IXPM   ghost pulse   net residual dispersion   wavelength division multiplexing  
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