7dB Optical Power Budget Improvements of 11.25Gb/s Optical OFDM PON Systems Using Optical Filters

2011 ◽  
Author(s):  
J. L. Wei ◽  
J.M. Tang
Keyword(s):  
Optical Power ◽  
Optical Filters ◽  
Power Budget ◽  
Optical Ofdm

Optical Power Budget and Cost Analysis in PON-based i-FTTH

2010 ◽  
Vol 2 (3) ◽  
pp. 127-138 ◽  
Author(s):  
Boonchuan Ng ◽  
Mohammad Syuhaimi Ab-Rahman ◽  
Aswir Premadi ◽  
Kasmiran Jumari
Keyword(s):  
Cost Analysis ◽  
Optical Power ◽  
Power Budget

scholarly journals Development and Validation of a Smartphone-Based Near-Infrared Optical Imaging Device to Measure Physiological Changes In-Vivo

Micromachines ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 180 ◽  
Author(s):  
Kacie Kaile ◽  
Anuradha Godavarty
Keyword(s):  
Near Infrared ◽  
Optical Power ◽  
Optical Filters ◽  
Noise Removal ◽  
Light Sources ◽  
Decomposition Algorithms ◽  
Physiological Changes ◽  
Imaging Device ◽  
Nir Imaging

Smartphone-based technologies for medical imaging purposes are limited, especially when it involves the measurement of physiological information of the tissues. Herein, a smartphone-based near-infrared (NIR) imaging device was developed to measure physiological changes in tissues across a wide area and without contact. A custom attachment containing multiple multi-wavelength LED light sources (690, 800, and 840 nm; and <4 mW of optical power per LED), source driver, and optical filters and lenses was clipped onto a smartphone that served as the detector during data acquisition. The ability of the device to measure physiological changes was validated via occlusion studies on control subjects. Noise removal techniques using singular value decomposition algorithms effectively removed surface noise and distinctly differentiated the physiological changes in response to occlusion. In the long term, the developed smartphone-based NIR imaging device with capabilities to capture physiological changes will be a great low-cost alternative for clinicians and eventually for patients with chronic ulcers and bed sores, and/or in pre-screening for potential ulcers in diabetic subjects.

Passive Optical Network System Performance Analysis Using a 10 Gbit/s DML

2014 ◽  
Vol 635-637 ◽  
pp. 1094-1097
Author(s):  
Di Ying Wu ◽  
Fan Bo Meng ◽  
Ran Li ◽  
Rong Sheng Liu ◽  
Fan Wu
Keyword(s):  
System Performance ◽  
Optical Network ◽  
Optical Power ◽  
Passive Optical Network ◽  
System Model ◽  
Network System ◽  
Power Budget ◽  
Fiber Nonlinearities ◽  
Linewidth Enhancement ◽  
Smart Grid System

As a promising technology for broadband communication, Passive Optical Network (PON) has been deployed to support the communication in smart grid system. This paper theoretically analyzes the influences on Directly Modulated Laser (DML)-based PON system performance including Bit Error Rate (BER) and power budget. First, we establish the DML-based PON system model, and then the system performances are simulated under different linewidth enhancement factor, received optical power and fiber length. Simulation results show the increase in received optical power to maintain a given BER due to fiber nonlinearities. This research provides a theoretical guidance on the PON system design.

scholarly journals A Performance Analysis of a Hybrid OCDMA-PON Configuration Based on IM/DD Fast-OFDM Technique for Access Network

2020 ◽  
Vol 10 (21) ◽  
pp. 7690
Author(s):  
Hichem Mrabet
Keyword(s):  
Wavelength Division Multiplexing ◽  
Orthogonal Frequency Division Multiplexing ◽  
Direct Detection ◽  
Average Power ◽  
Access Network ◽  
Optical Power ◽  
Passive Optical Network ◽  
Free Access ◽  
Power Budget ◽  
Budget Analysis

The purpose of this article is to propose a new configuration based on OCDMA and Fast-OFDM techniques for access network applications. A hybrid intensity modulation with direct detection, fast orthogonal frequency-division multiplexing–code division multiplexing access (IM/DD Fast-OFDM-CDMA) system is analytically and numerically evaluated for an amplifier-free access network. Therefore, system performance is analytically investigated in terms of bit error rate/Q-factor as a function of simultaneous users, fiber length and launched optical power. Firstly, the proposed analytical model includes the overlapping effect among OFDM subcarriers, the peak-to-average power ratio (PAPR), and multiple access interference (MAI). Secondly, a simulation setup is performed, allowing four simultaneous users operating at 40 Gb/s in a passive optical network (PON) context. Furthermore, a power budget analysis is made between IM/DD Fast-OFDM-CDMA, all-optical IM/DD OFDM-CDMA (IM/DD AO-OFDM-CDMA) and OCDMA wavelength division multiplexing (OCDMA-WDM) configurations. It is shown that at 40 Gb/s and by using 2D-hybrid coding (2D-HC), the maximum achievable transmission-reach of IM/DD Fast-OFDM-CDMA is 142 km, which is 34 km and 60 km higher than those provided by the IM/DD AO-OFDM-OCDMA and OCDMA-WDM PON configurations, respectively.

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