The Evolution of Fibre Optic Communication Technology

The Present Status of Optical Communication

The 2012 global fiber core with about 236 million kilometer, the cumulative amount of the fiber core has more than 1.8 billion kilometers; In 2012 China’s optical fiber with a core of about 116 million kilometers, has been laying fiber optic cable lengths up to 14.81 million kilometers, has been laying fiber over 600 million core km; Currently open wire and cables have been all disabled, only 200000 kilometers of microwave circuits, as well as a small satellite link; Global broadband subscribers more than 648 million, of which 128 million FTTx users; number of broadband users are 180 million, of which fiber broadband users of about 19.48 million, covering 94 million fiber access; global mobile subscribers has more than 6 million (of which 51 million LTE subscribers in 2013 up to 200 million), China’s mobile subscribers reached 1.165 billion mobile Internet users reached 8.13 one hundred million. All of which are the basis of optical communications, today more than 95% of the global amount of information that is transmitted through the optical communication.

Laying the early foundation 1960s (invented laser and fiber), 70s early R & D field trials and commercialization (short wavelength multimode born), 80s single-mode and long wavelength system as applied, 90s OA/WDM transmission and network appears. To 00s, large capacity (number of Tb/s) technology, systems and networks began to appear, to the ultra high speed optical fiber communication, large capacity, ultra long range development, the development of multi service bearer. 2005 China’s first 40Gb/s systems R & D is completed, also in 2005, China is the first 80x40Gb/s commercial DWDM system.

After “five 10-years” development, 100Gb/s system began commercial, PTN/IPRAN large-scale applications, the maximum transmission distance of 10.7 Tb/s 10608km in 2011 years, in 2012 single fiber maximum system capacity of 102.3 Tb/s 240 km.

The development trend of Optical Fiber Communication

 For the development trend of Optical Fiber Communications, Mao Qian said PEOTN era is coming. Mao Qian believes that grouping and large-capacity OTN future direction of development, driven by demand, is expected to achieve commercial PEOTN soon. PEOTN technical requirements there are four major points: the positioning of large particles service scheduling, you need more than 10T exchange capacity; blocking access to the whole business of the need to harmonize the cross; China Mobile has selected 100G, PEOTN should be based on 100G platform; respond OTN sinking trend, POTN requires serialization.

Software-defined optical transmission network SDTN / SDON centralized control, unified hardware and open interfaces for interoperability, full use of resources, improve innovation capabilities to provide flexible services.

It is mentioned two current all-optical switching network problems – optical storage and optical logic devices, optical storage is currently still relatively difficult to cross, and optical logic devices are based on optical storage, and therefore more difficult to cross.