Optical Fibers for Next Generation Optical Communications

Author(s):  
Sophie LaRochelle ◽  
Lixian Wang
2014 ◽  
Vol 25 (1) ◽  
pp. 169-185
Author(s):  
Samuel Ángel Jaramillo Flórez ◽  
Yuli Fernanda Achipiz

The bioelectronics takes of the biology the optimized elements for to do a copy and to build technological mechanisms with functions based in that of body lives components. Telecommunications and biology present an analogy between the optical receivers and insects eyes, which forms are adequate to receipt signal since a transmitter, and these are been leaded to perfection by the nature during millions of years in the environment adaptation. The sizes and the forms depend of the direction of the waves and of the radiation pattern of these biotransmitters and bioreceivers (omatidies of insects eyes), which is similar as the optical communications emitters and photodetectors. The growth of the telecommunication services makes necessary the optimization of the bandwidth of the transmission channels. Although the optic transmission is considered like the ideal as for the attenuation and distortion characteristics that make that it possesses the better relation bandwidth - longitude, the demand of more transmission capacity forces to take advantage of them efficiently. High costs generated when deploying Optic Fiber Networks at the transport level, together with other factors that avoid PONs arriving to the home and/or office, have impulsed the design and implementation of partially optical networks (FITL), including an alternative that uses infrared light. This work explores the basis of these news access networks, and it is presented an optical communication transmission/reception system with optic channel of free space where has been modulated the transmitter laser through a set of spherical lens and optical fibers that expand the beam of light to different points of an indoor enclosure producing multiple punctual images located in positions that permit to determine and to optimize the bandwidth of the system. The computational simulation results are showed and are compared with those experimentally measured, indicating that this is an original method for to design emitters and receivers of high performance for optical communications.


2020 ◽  
Vol 10 (23) ◽  
pp. 8584
Author(s):  
Xesús Prieto-Blanco ◽  
Carlos Montero-Orille ◽  
Vicente Moreno de Las Cuevas ◽  
María C. Nistal ◽  
Dolores Mouriz ◽  
...  

Few mode optical fibers are a promising way to continue increasing the data rate in optical communications. However, an efficient method to launch and extract separately each mode is essential. The design of a interferometric spatial mode (de)multiplexer for few mode optical fibers is presented. It is based on a single Michelson-like interferometer which consists of standard optical elements and has a reflective image inverter in one arm. Particular care has been taken in its design so that both polarizations behave the same. Moreover, this interferometer can process several pairs of modes simultaneously. The multiplexer also consists of: a phase plate, focusing optics at both ports of the interferometer and elliptical core fibers to recirculate some outputs. It can multiplex ten spatial and polarization modes and it presents low losses and no intrinsic crosstalk between modes. Additionally, it is polarization insensitive, achromatic, compact and inexpensive. The same system can work as a demultiplexer when used in reverse. In this case, both the losses and the crosstalk remain very low. Similar designs that perform other functions, like an add-drop mode multiplexing, are also suggested.


2007 ◽  
Vol 45 (3) ◽  
pp. S32-S38 ◽  
Author(s):  
Sudeep Bhoja ◽  
Ali Ghiasi ◽  
Yongmao Chang ◽  
Balagopal Mayampurath ◽  
Mike Dudek ◽  
...  

2012 ◽  
Vol 50 (2) ◽  
pp. s50-s57 ◽  
Author(s):  
Yasuhiro Aoki ◽  
Yoshihisa Inada ◽  
Takaaki Ogata ◽  
Lei Xu ◽  
Shaoliang Zhang ◽  
...  

2006 ◽  
Author(s):  
Simo Tammela ◽  
Mikko Söderlund ◽  
Joona Koponen ◽  
Valery Philippov ◽  
Per Stenius

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