- MACH ZHENDER MODULATOR DOES NOT EXIST IN OPTISYSTEM 14 GENERATOR
- MACH ZHENDER MODULATOR DOES NOT EXIST IN OPTISYSTEM 14 FULL
- MACH ZHENDER MODULATOR DOES NOT EXIST IN OPTISYSTEM 14 FREE
Expression corresponding to the first two-term Fourier expansion of a triangular-shaped waveform is obtained in optical intensity. An optical interleaver followed by a chirped fiber grating (CFBG) is further employed to tune the power of modulation sidebands. With the modulation of a single-drive Mach-Zehnder modulator (SD-MZM), five primary even-order sidebands are firstly generated.
MACH ZHENDER MODULATOR DOES NOT EXIST IN OPTISYSTEM 14 GENERATOR
8, we reported a triangular waveform generator based on spectrum manipulation. The basic principle of this kind of approach is to control the harmonics of optical intensity approximately equal to the first two-term Fourier components of a triangular waveform. To resolve this issue, generations based on external modulation of a continuous wave (CW) light using electro-optical modulators are proposed 8, 9, 10, 11, 12, 13, 14, 15, 16.
MACH ZHENDER MODULATOR DOES NOT EXIST IN OPTISYSTEM 14 FULL
The drawback of this kind of schemes is that the use of mode-locked laser (MLL) leads to a high cost and the generated triangular waveforms have small duty cycle (<1), which cannot satisfy the requirement in many applications where a full duty cycle (=1) is desired. In this method, the spectral envelope of an optical frequency comb is modified by the spectral shaper to be a triangular spectral envelop, which can be mapped to the temporal waveform by using FTTM. One typical method is based on optical-spectrum-shaping combined with frequency-to-time mapping (FTTM) 5, 6, 7. Therefore, photonic methods have emerged as a replacement because of the wide bandwidth, low loss and immunity to electromagnetic interference. With the development of photonic technology, these shortcomings in electronic technology could be effectively overcome. Traditionally, triangular-shaped waveforms are generated by electric methods but the generated signals have limitations like low carrier frequency and the narrow bandwidth 4. Triangular-shaped pump pulses can also induce cross-phase modulation (XPM), which can be used in optical frequency conversion, pulse compression and signal copying 2, 3. For example, optical triangular-shaped pump pulses can be used to covert time-division multiplexed (TDM) signals to wavelength-division multiplexed (WDM) ones 1. Among various signal profiles, signals with a triangular-shaped waveform, which is featured by linearly up-and-falling edges in time domain, has been widely used in all-optical data processing, and communication systems 1, 2, 3. In the end, a comparative cost analysis of the proposed architecture with the conventional architecture is done, which shows a cost reduction of 21 % by the proposed system.In recent years, photonic generation of arbitrary waveform signal is an attractive research area in microwave photonic. The performance analysis of the proposed system is done in Optisystem by using the constellation points which shows that the proposed architecture can support data rate up to 40 Gbps using 512 subcarriers and 10 Gbps per BBU with QPSK over 4 km of FSO medium. In addition, an Orthogonal Frequency Division Multiple Access (OFDMA) is implemented to provide high spectrum efficiency and high data rate in an adverse channel environment.
MACH ZHENDER MODULATOR DOES NOT EXIST IN OPTISYSTEM 14 FREE
Here in this paper, we propose an architecture by replacing an optical fiber with Free Space Optics (FSO) at the front-end of the 5G network. Optical Fiber is used as a transmission media to connect the densely deployed Remote Radio Units (RRUs) with the Baseband Units (BBUs) at the Centralized Radio Access Network (C-RAN) that makes the architecture quite complex and expensive in terms of deployment and maintenance cost. The 5G network can adjust large users with multiple device connectivity by providing high bandwidth with a minimum delay which depends on the underlying network architecture for connecting different components of the systems. Therefore, strong communication technology is required that can provide high data rates along with the provision of multiple connecting devices for different users. It is quite challenging to accommodate a large number of users with multiple communication devices without degrading the quality of service at an acceptable cost. The demand for high-speed internet with a high-capacity network is increasing at an exponential rate.