Pinkey Gupta, Garima Mathur, R.P.Yadav| Reconfigurable All Optical NAND Gate Based on Cross-Phase Modulation in HNLF IFRSA International Journal Of Electronics Circuits And Systems |Vol 3|issue 2|June 2014 201 Reconfigurable All Optical NAND Gate Based on Cross- Phase Modulation in HNLF. Pinkey Gupta PG scholar,Department of Electronics & Communication, jaipur Engineering College, jaipur Garima Mathur Research scholar, Department of Electronics & Communication, MNIT, Jaipur R.P.Yadav Professor,,Department of Electronics & Communication, MNIT, Jaipur ABSTRACT All optical NAND gates based on cross-phase modulation. It accomplish error-free performance at 10 Gb/s and the receiver sensitivity for a bit-error rate of 10 -9 is below -15.0 dBm. The designing parameters are more accurate and sensible if we are utilizing the non- linear characteristics of fiber like Cross gain modulation (XGM). Keywords—All-optical logic, all-optical signal processing ,cross-phase modulation (XPM), highly nonlinear fiber (HNLF), optical communications. 1. INTRODUCTION For future development is to avoid the need of optical- to-electrical conversion and to overcome electronic bottlenecks. And its also requirement of higher data rates and channel utilization in telecommunication systems. Now a days High-speed all-optical logic gates are the main terms to realize all-optical functions. From many nonlinear materials are researched only one device has materialize as a practical explanation for all-optical signal processing the semiconductor optical amplifier (SOA)[1]. All-optical signal processing is particularly of interest telecommunications applications, Today’s telecom networks are based on requires all- optical technologies such as add–drop multiplexing, packet synchronization, clock recovery ,address recognition, Based on SOA, the cross phase modulation (XPM) is simple to implement and high bit rate operation can be obtained, with high conversion efficiency as well as insensitivity to the polarization of input signal. fig. 1. Shown the principle of operation of the gate: input signal waveforms and output waveform which associated with the probe signal So far, all-optical NAND gates are typically designed using nonlinear effects XPM in semiconductor optical amplifiers (SOAs) or in highly nonlinear fibers (HNLFs)[2] Therefore, we proposed a simple NAND gate based on cross-phase modulation (XPM) in an highly nonlinear fiber [2][3]. hence, we realized NAND logic operations at 10 Gb/s using a single device and under the same input operating conditions. Two signals (A and B) return-to-zero, on–off-keying (RZ-OOK) is implemented and both synchronized signals 10-Gb/s signals( A and D) containing picosecond pulses are sent into a length of HNLF. Because here we only use only one nonlinear effect (i.e., XPM)[4], the experiment is simple easy to design and control. Moreover, we only used two input data signals, hence it can avoid the need for additional sources such as a continuous-wave (CW)[5] or a clock signal. However, we did not achieve error-free operation. IIJECS Journal homepage: www.ifrsa.org