Gigabit passive optical networks and catv over hybrid bidirectional free space optics +20 km single mode fiber

2015 ◽  
Vol 57 (12) ◽  
pp. 2867-2871 ◽  
Author(s):  
Artur Sousa ◽  
Ali Shahpari ◽  
Vitor Ribeiro ◽  
Mario Lima ◽  
António Teixeira
Keyword(s):  
Optical Networks ◽  
Free Space ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Free Space Optics ◽  
Passive Optical Networks ◽  
Space Optics

scholarly journals Performance Analysis of Q Factor Optical Communication in Free Space Optics and Single Mode Fiber

2019 ◽  
Vol 6 (3) ◽  
pp. 167-175 ◽  
Author(s):  
Salim Burdah ◽  
Octarina Nur Samijayani ◽  
Ary Syahriar ◽  
Rizki Ramdhani ◽  
Rahmat Alamtaha
Keyword(s):  
Performance Analysis ◽  
Optical Communication ◽  
Free Space ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Free Space Optics ◽  
Q Factor ◽  
Space Optics

Single-mode fiber optical crossbar routing switch with ferroelectric liquid-crystal–VLSI technology and free-space optics

1997 ◽  
Vol 36 (17) ◽  
pp. 3866 ◽  
Author(s):  
R. Moignard ◽  
Y. Defosse ◽  
S. Kerouédan ◽  
J. L. de Bougrenet de la Tocnaye ◽  
P. Le Gars ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Free Space ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Free Space Optics ◽  
Ferroelectric Liquid Crystal ◽  
Space Optics ◽  
Vlsi Technology ◽  
Fiber Optical

An ultra-dense spacing-based PON by incorporating dual drive Mach–Zehnder modulator for comb generation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Navjot Singh ◽  
Bharat Naresh Bansal
Keyword(s):  
Optical Networks ◽  
High Speed ◽  
Low Cost ◽  
Optical Network ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Passive Optical Network ◽  
Passive Optical Networks ◽  
Differential Phase Shift ◽  
High Data

Abstract Wavelength division multiplexed passive optical is promising technique to achieve a high data rate and large number of user. The notable advantages of WDM PON is the combination of reliability, cheap in cost, accessible bandwidth, high security, large optical reach and it can support large number of ONU. There are multiple approaches to achieve high-speed WDN PON using different transmission techniques. In WDM, multiple lasers are required which increase the cost of the system. To reduce cost, an optical multicarrier generation system is proposed. An economical multiple carrier generation with the incorporation of sine generator and Mach–Zehndar modulator is demonstrated. Utmost work of sine generator and dual drive modulator was to attain low cost functioning of passive optical networks. Multicarrier generation was done and replacement of laser carriers with optical multicarrier generator. Carriers were generated with the frequency spacing of 20 GHz and these carriers were used in the passive optical networks with the tone-to-noise ratio of 40 dB, amplitude difference of 1.4 dB. For the transmission of downstream in the PON, differential phase shift keying was employed at 10 Gbps data speed. Transmission distance achieved was 30 km using single-mode fiber and this was a part of optical distribution network. Optical network unit was next part after ODN and signals were received with balanced receiver. Moreover, half signal was given to intensity modulator for the signal re-modulation. Bit error rate of 10–9 was achieved at all channels in the downstream. An upstream of 10 Gbps was accomplished in the passive optical network.

Assisted Focus Adjustment for Free Space Optics System Coupling Single-Mode Optical Fibers

2013 ◽  
Vol 60 (11) ◽  
pp. 5306-5314 ◽  
Author(s):  
Koichi Yoshida ◽  
Kuniaki Tanaka ◽  
Takeshi Tsujimura ◽  
Yuji Azuma
Keyword(s):  
Optical Fibers ◽  
Free Space ◽  
Single Mode ◽  
Free Space Optics ◽  
Space Optics ◽  
System Coupling

scholarly journals Polarization Division Multiplexing of OFDM Radio-over-Fiber Signals in Passive Optical Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Maria Morant ◽  
Joaquin Pérez ◽  
Roberto Llorente
Keyword(s):  
Optical Networks ◽  
Spectral Efficiency ◽  
Optical Network ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Radio Over Fiber ◽  
Passive Optical Network ◽  
Passive Optical Networks ◽  
The Impact ◽  
Polarization Division Multiplexing

This paper describes the state-of-the-art of polarization multiplexing for optical networks transmission. The use of polarization division multiplexing (PDM) permits to multiply the user capacity and increase the spectral efficiency. Combining PDM and orthogonal frequency division multiplexed (OFDM) modulation allows maximizing the optical transmission capacity. The experimental demonstration of transmitting OFDM signals following ECMA-368 ultrawide band (UWB) standard in radio-over-fiber using PDM in passive optical networks is herein reported. The impact of cross-polarization and cochannel crosstalk is evaluated experimentally in a three-user OFDM-UWB subcarrier multiplexed (SCM) configuration per polarization. Each SCM uses up to three OFDM-UWB channels of 200 Mbit/s each, achieving an aggregated bitrate of 1.2 Gbit/s with 0.76 bit/s/Hz spectral efficiency when using PDM transmission. The experimental results for the polarization-multiplexed SCM indicate that a 4 dB additional polarization crosstalk interference can be expected compared to a nonpolarization-multiplexed transmission system which translates to 2.4 dB EVM penalty in the UWB signals. The successful PDM transmission of SCM multiuser OFDM-UWB over a passive optical network of 25 km standard-single mode fiber (SSMF) reach is demonstrated.

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