OpticalCommunications光通信PPT课件
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➢any form of telecommunication that uses light as the transmission medium.
➢consists of a transmitter, a channel a receiver
Technology
Optical Sources
➢ Light Emitting Diode ( LED ) ➢ Laical optical communications
➢Optical fiber communications ➢Free-space optical communications
Optical fiber communication
➢during 1970s，the development of extremely low-loss optical fibers
Free-space optical communication
➢Free-space：air，outer space，vacuum，or something similar
➢Uses light propagating in free space to transmit data for telecommunications or computer networking
Applications
➢LAN-to-LAN connections on campuses at Fast Ethernet or Gigabit Ethernet speeds
➢LAN-to-LAN connections in a city ,a metropolitan area network
➢Transmit information from one place to another by sending pulses of light through an optical fiber
Applications
Transmit telephone signals Transmit Internet communication Transmit cable television signals
Optical Communications
Members: Xiaoyu Zhao Chenjiao Bai Fanfan Lian Qiaoli Xu
Jun Liu Yao Xu Jun Hu
Overview
➢ Definition ➢ Technology
➢ Optical transmitters/sources ➢ Optical receivers/detectors
➢Fabry-Perot Laser (FP) ➢Distributed Feedback Laser (DFB)
➢Vertical Cavity Surface Emitting Laser (VCSEL)
Technology
Optical Detectors
➢ Avalanche Photodetector (APD) ➢Better sensitivity than PIN detector ➢Temperature sensitive ➢Data rate to 2.5Gbps
➢ P-I-D Photodiode: ➢Wideband 800 - 1600 nm ➢High data rate up to 100Gbps
Advantages
➢ High frequency ➢Short wavelength ➢High transparency for electromagnetic
➢ Advantages ➢ Typical optical communications
➢ Optical fiber communications ➢ Free-space optical communications
➢ Applications
What are optical communications
➢Converged Voice-Data-Connection ➢Temporary network installation
Thank you!
个人观点供参考，欢迎讨论！
➢consists of a transmitter, a channel a receiver
Technology
Optical Sources
➢ Light Emitting Diode ( LED ) ➢ Laical optical communications
➢Optical fiber communications ➢Free-space optical communications
Optical fiber communication
➢during 1970s，the development of extremely low-loss optical fibers
Free-space optical communication
➢Free-space：air，outer space，vacuum，or something similar
➢Uses light propagating in free space to transmit data for telecommunications or computer networking
Applications
➢LAN-to-LAN connections on campuses at Fast Ethernet or Gigabit Ethernet speeds
➢LAN-to-LAN connections in a city ,a metropolitan area network
➢Transmit information from one place to another by sending pulses of light through an optical fiber
Applications
Transmit telephone signals Transmit Internet communication Transmit cable television signals
Optical Communications
Members: Xiaoyu Zhao Chenjiao Bai Fanfan Lian Qiaoli Xu
Jun Liu Yao Xu Jun Hu
Overview
➢ Definition ➢ Technology
➢ Optical transmitters/sources ➢ Optical receivers/detectors
➢Fabry-Perot Laser (FP) ➢Distributed Feedback Laser (DFB)
➢Vertical Cavity Surface Emitting Laser (VCSEL)
Technology
Optical Detectors
➢ Avalanche Photodetector (APD) ➢Better sensitivity than PIN detector ➢Temperature sensitive ➢Data rate to 2.5Gbps
➢ P-I-D Photodiode: ➢Wideband 800 - 1600 nm ➢High data rate up to 100Gbps
Advantages
➢ High frequency ➢Short wavelength ➢High transparency for electromagnetic
➢ Advantages ➢ Typical optical communications
➢ Optical fiber communications ➢ Free-space optical communications
➢ Applications
What are optical communications
➢Converged Voice-Data-Connection ➢Temporary network installation
Thank you!
个人观点供参考，欢迎讨论！