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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore, India (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Impact of Modulation Techniques for Hybrid-WDM Based FSO
摘要： Free space optical communication (FSO) provides high data rate by allowing light passed through the atmosphere. It is very effective and efficient technology for wireless communication. This emerging field basically uses invisible beams of light such as ultraviolet, infrared, etc. This work exclusively deals with the designing of hybrid WDM based FSO system using the simulation software Opti-System 7.0 with Minimum-Shift Keying and Differential-phase-shift keying. Further their study has been made as to which modulation techniques provides better means of communication. The normal rain weakening from rain power information which are gathered for a period for six months. The concert of the future system is evaluated in terms of Bit Error Rate, Q-factor, and Receiver Sensitivity are examined with respect to link distance for using rain attenuation 20.5dBm. The transmission wavelength and data rate is 1550nm and 2.5Gbps considered for investigation.
关键词： Receiver Sensitivity,Hybrid WDM,BER,Free space optical communication,DPSK,MSK
更新于2025-09-23 15:23:52
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[IEEE 2018 Asia Communications and Photonics Conference (ACP) - Hangzhou (2018.10.26-2018.10.29)] 2018 Asia Communications and Photonics Conference (ACP) - Data center optical interconnection based on IRZ-DPSK signal
摘要： the expansion of optical data centers will lead to insufficient wavelength resources. This paper proposes a wavelength-reused scheme. Two signals are imposed on the same optical carrier to reduce the number of wavelengths by half.
关键词： Passive optical interconnection,Data center,DPSK
更新于2025-09-11 14:15:04
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[IEEE 2018 IEEE 7th International Conference on Photonics (ICP) - Kuah (2018.4.9-2018.4.11)] 2018 IEEE 7th International Conference on Photonics (ICP) - Demonstration of Receiver Generated Optical Duobinary and VSB-NRZ for Next-Generation PON
摘要： We present experimental demonstration of receiver generated optical duobinary (ODB) format for downstream and vestigial sideband non-return to zero (VSB-NRZ) format for upstream in a next-generation passive optical network (NG-PON). Both formats are generated at the respective receivers by a single optical bandpass filter simplifying the design of the optical network unit (ONU) when compared with Mach Zehnder delay interferometer (MZDI) based detection. The optical line terminal (OLT) transmits a differential phase shift keying (DPSK) signal to take advantage of greater tolerance to fiber non-linear effects, which is then converted to ODB format at the ONU receiver for simple direct detection. VSB-NRZ in upstream is generated by adding a bandpass filter at OLT receiver instead of ONU transmitter to keep its design simple. The system presented here obtained a reach of 25 km on standard single mode fiber (SSMF) with C-band wavelengths for both down and upstream without using any dispersion compensation. The 1:64 split was emulated using an optical attenuator while using only a single transmitter and receiver pair at the ONU.
关键词： Optical Duobinary,VSB-NRZ,Optical Bandpass Filter,PON,DPSK
更新于2025-09-04 15:30:14