Tag Archives: fiber optic network

Fiber Optics is the Ideal Way in Today’s and Future’s Application

As we see, fiber optic transmission has already been the efficient way to transmit a wireless signal and RF signal. Compared to coaxial cable, fiber optic cables has the advantages such as lower signal loss and lower weight, except this, it is also cheaper than coaxial cable. Only by these reasons, fiber optics play an important role in wireless networks. Next we will introduce several fiber optic product in different application for you.

Fiber Optic Transmitter and Receiver

The function of fiber optic transmitter, optical transmitter with AWG see at the figure, is transmitting the RF signal into an optical signal in 1.3μm, the input impedance of the fiber optic transmitter is 50Ω and the output is an optical signal whose brightness is synchronized with the RF voltage. An optical detector internal to the laser transmitter is used to monitor the output power and adjust the bias current of the laser to maintain a constant average optical output. It maintains the consistency in performance, the best linearity and the longest life of the system.

optical transmitter with AGC

Fiber optic receiver use a high speed detector and for transmitting the optical signal to RF signal. It is usually used with fiber optic transmitter. Low noise linear gain stages boost the signal back up to the desired RF level. Our Fiberstore‘s all fiber optic receivers overtake consistent tests and keep stable and long-term performances.

Fiber Optic Cables and Fiber Optic Connectors

Well, based on the special characteristic of RF in fiber optic applications, single mode fiber cable is the choice for it. The fiber has a core and cladding size of 9/125μm, and the fiber optic connector mainly for the stability and coupling of the light. But in the RF/fiber optic system, angle polished connectors are used more often, such as APC, UPC. Due to them, they can reduce the optical reflections at the connector. At the same time, we need to know that reflection in the system can cause increased noise, dirt and so on, then the connector will cause higher connector loss but also reflections. So the connector need to keep clean, the right way to keep clean is that using 99% alcohol and lint free wipes, always replace the cap on the ferrule when the connector is not in use.

Applications

In Building public safety, Fiberstore’s technology and Bidi fiber optic transceiver deliver the signal across the fiber optic network for in-building signal distribution. The benefits of fiber optics are endless. Fiberstore’s modular devices transmit RF signal in fiber easily and they keep distortion-free communications in the building of emergency, fire and police radio RF systems. Facing with the system capacity and improving the reliability of the network. Fiberstore is toward the direction of lower telecommunication cost, safe and reliable for users.

In military aspect, Today’s global battlefields are sophisticated networks of Army, Navy, Coast Guard and Air Force defense organizations requiring robust, they need monitoring and tracking, as well as high quality voice, video and data communications, as for this requirements, Fiberstore RF solution unmatched performance for radio frequency transport applications ranging from low frequency through VHF, UHF to satellite-band transmissions. Fiber optic cables provide the highest performances for soldier’s safety in military applications. The figure shows the special connector that can be used in the military application. We are very strict with the design and quality of fiber optic connector.

fiber optic connector

With the developments of the Internet, wireless LAN technology and protocols such as IEEE 802.11, Fiberstore;s fiber optic transceiver technology provides flexibility in architecture design, extended radio frequency coverage and enhanced performance in the wireless spectrum, and provide higher ability for wireless users. Fiberstore is doing his best for faster and more reliable communications solutions.

To Introduce Optical Communication and Internet Technology

Technology of terabit optic circuit packet integrated switching system
New exchange system and integrated optic circuit packet layers will be provided to meet the large capacity, high quality, low cost and effective demand so as to adapt to the cable wireless traffic spikes in the service in the future.
A connection-oriented packet transport technology is considered to be an effective way to improve the performance of packet data transmission. It is necessary, can put a layer of transport network in the direction of capital spending and minimizing operating costs to overcome the network provider’s storage and traffic increase of income. And unified control mechanism is applied to the network resource allocation, flexible wavelength circuit and packet layer according to the service characteristics. The key technologies of the system are as followings.
Technology of Terabit Optic-Circuit-Packet Integrated Switching System
  * Connection-oriented Packet Transport
  * Optic-Circuit-Packet Integrated Switch
  * Optic-Circuit-Packet Layer Integrated Control/Management
Technology of beyond-100G Optical Transmission
  * Long-reach OTN Transceiver

  * Short-reach Ethernet Transceiver

Technology of terabit optic circuit packet integrated switching system
Smart IDC Network Control Technology for Cloud Service
Along with the rapid spreads and changes of cloud services and the technologic growth of the components in the IDC, the IDC networks are demanding following changes.
Cloud optimized: The virtualization rate of the server is rising up to 10:1-100:1 and storage virtualization is also possible recently. So IDC is requiring the cloud-optimized virtualization to the network side which are connecting the virtualized cloud resources.
Flattened: There are network control needs to reduce the delay latency of virtualized server-to-server communications which is occuping up to 70%, to rise the utilization rate the link resources of L2 IDC networks of Tree-shape multi-layer hierarchical architecture with STP.
Auto-Managed: There are demands of integrated management of network and cloud resources between IDC and create/delete/VM migration to ensure seamless services in the cloud.

Therefore, our research target to develop the Smart IDC fiber optic solution to solve the current problems of IDC network with the 3 IDC network control technologies of the Cloud-Optimized Virtual Network Control technology, the Flattened IDC Network Control Technology and Auto-managed IDC network control technology.

High speed optical transmission technology
The rapid progress in optical transmission technology has been supporting the ever increasing transmission traffic. In particular, the WDM technology, it is by the end of last century, played a main role. However, the new technology needs to use data traffic exponentially. A solution is 100Gb/s transmission. IEEE announced 40G/100G Ethernet standard and ITU-T has completed ONT standard to accommodate 100G signals in DWDM backbone network. Recently, the 100Gb/s transmission technology has become the commercial deployment, in addition to the existing 10Gb/s and 40Gb/s. Already technologies beyond 100G or 400G are started being discussed. With a long-term perspective, it is a disruptive

technology, SDM (space division multiplexing) technology is seriously explored to harness the traffic in economic and energy efficient way.

Next Generation WDM-PON Technology
The WDM-PON is promising technology to provide broadband access offering optic-wireless converged next generation multi-application service with the highest quality.
There are many advantages of the WDM-PON:
* Using multiple wavelength on a single fiber, each of which carries a transmission bandwidth up to 10Gb/s at maximum; Therefore, the WDM-PON can reduce the optical access infrastructure;
* Suitable for long-reach application and possible to achieve OPEX reduction;
* Provide co-existence with legacy TDM-PON (EPON system, and GPON) systems and pay as you grow upgradability;
* Unique advantages of so-called protocol transparency, which means that it requires no specific transmission protocol, and the physical layer security, in addition to scalability in the increase of the bandwidth and guarantee of the quality of service based on bandwidth abundance.

Synchronous Optical Networking Introduction

Synchronous Optical Networking is usually called SONET for short. The SONET standards were coded in the mid-1980s to consider benefit of low-cost fiber optic transmission. It defines a hierarchy of data rates, formats for framing and multiplexing the payload data, as well as optical signal specifications (wavelength and dispersion), allowing multi-vendor interoperability.

SONET may also be referred to as “T-1 on steroids”. Can you explain that? As you may know, the digital hierarchy (DS-0, DS-1, DS-2, DS-3 and much more) was created to provide cost-effective multiplexed transport for voice and data traffic from one location inside a network to a separate.

SONET and SDH (Synchronous Digital Hierarchy) are two equivalent multiplexing protocols for transferring multiple digital bit streams using lasers or LEDs (light-emitting diodes) over the same optical fiber. They were made to replace PDH (Plesiochronous Digital Hierarchy) system to get rid of the synchronization issues that PDH Multiplexer had. SONET is synchronous, which means that each connection achieves a continuing bit rate and delay. For example, SDH or SONET might be utilized to allow several Internet Service Providers to talk about exactly the same optical fiber, without being affected by each others traffic load, and without having to be able to temporarily borrow released capacity from one another. SONET and SDH are considered to become physical layer protocols since they offer permanent connections and do not involve packet mode communication. Only certain integer multiples of 64kbits/s are possible bit rates.

SONET is really TDM(time division multiplexing) based and this causes it to be readily supported fixed-rate services such as telephony. Its synchronous nature is designed to accept traffic at fixed multiples of the basic rate (64kbit/s), without requiring variable stuff bits or complex rate adaptation.

The SONET data transmission format is based on a 125us frame composed of 810 octets, of which 36 are overhead and 774 are payload data. The fundamental SONET signal, whose electrical and optical versions are referred to as STS-1 and OC-1, respectively, is thus a 51.84Mb/s data streams that readily accommodate TDM channels in multiples of 8 kb/s.

It is important in fiber optic network that SONET can be used to encapsulate PDH and other earlier digital transmission standards. It is also used directly to support either an ATM (Asynchronous Transfer Mode) or packet over SONET/SDH (POS) networking. So SONET/SDH is actually a generic all-purpose transport container for moving both voice and knowledge traffic. They in themselves aren’t communications protocols.

SONET brings by using it a subset of benefits that make it differentiate themselves from competitive technologies. These include mid-span meet, improved operations, administration, maintenance, and provisioning (OAM&P), support for multipoint circuit configurations, non-intrusive facility monitoring, and the capability to deploy a variety of new releases.

Improved OAM&P is among the greatest contributions that SONET brings to the networking field. Element and network monitoring, management, and maintenance has always been something of the catch-as-catch-can effort due to the complexity and diversity of elements inside a typical service provider’s network. SONET overhead includes error-checking ability, bytes for network survivability, and a diverse set of clearly defined management messages.

Warburg Pincus Invests In Polish Fiber Optic Network Operator INEA for FTTH Patch Cables

Polish fiber optic network operator INEA SA says it has received a strategic investment from an affiliate of Warburg Pincus, a global private equity firm focused on growth investing. The investment firm has committed additional funding for growth and consolidation, including planned roll out of fiber to the home (FTTH patch cable) technology. Terms of the investment were not disclosed.

Since its foundation in 1992, INEA has grown into the fourth-largest fiber optic network operator in Poland and claims it is the leading triple-play operator in the Wielkopolska region. Passing 360,000 homes and serving 170,000 subscribers, INEA provides telecommunications services over its fully upgraded network, including HotSpots throughout Poznan and its own local TV channel. Wielkopolska is the third-largest Polish province with a population of 3.4 million. In 2012 the dompany generated revenues of PLN 169 million ($53 million).

The FTTH roll out will extend fiber-optic broadband access to over 200,000 additional households and a significant number of businesses in Wielkopolska. INEA says its fiber optic network will be the most advanced in Poland, providing high-speed broadband access to over 500,000 homes across the entire Wielkopolska region.
In addition, the investment by Warburg Pincus will support INEA’s ability to consolidate the highly fragmented local cable market.

The transaction is believed to be the largest private equity investment in Poland this year.

For more information about FTTH patch cables, pls visit our website:www.fs.com

Japan Launched Highest Speed 2Gbps Fiber Optic Network, Faster Than Google Fiber

Japanese communication fiber optic network company So – net announced yesterday that they have introduced the world’s highest speed fiber optic networks “NURO optic”, as “one of the world’s fastest” personal commercial fiber-to-the-home cable service, faster than Google Fiber. Its the biggest 2 GBPS download speed, upload speed is 1 GBPS, and supports a maximum speed of 450 MBPS wireless base stations.

To deal with “NURO optic” now is to sign up for two years, monthly 4980 yen, at the same time you need to pay 840 yen fees and 31500 yen for installation cost. But “NURO optic” service has not been extended to all of cities in Japan, only open the Tokyo and the Kanto and other four cities.

So-Net was established in 1995 in November, and in the next year began to provide  fiber optic network services. In 2001, So-Net began to arrive in Taiwan. So-Net Hong Kong is in 2001 to provide broadband Internet access services and with the SONY brand and premium strategy called preemption already saturated cable management Internet users.

In May 2002, cooperate in central Tokyo electric power, electric power company, started to provide fiber-optic Internet service. (In early August last year, SONY announced that it plan to spend 60 billion yen ($764 million) to buy a 42% stake, the rest of the implementation of the company’s sole holding. SONY plans to use the So-Net to enhance Japan and the Asian companies and interactive entertainment experience, and hopes to provide new web fiber optic transmission services project.).