MPO/ MTP Parallel Optics Technology in High Speed Data Center Application

Transcription

1 MPO/ MTP Parallel Optics Technology in High Speed Data Center Application 1

2 1.Data centers present and future The need for ever-greater bandwidths continues unabated. Data centers must respond early to provide sufficient capacities and plan for upcoming requirements. This chapter explains the reasons for the relentless growth in bandwidth and describes possible solutions to it. 1.1 Bandwidth as the driving force The data quantity transmitted worldwide is growing exponentially. It will quadruple in the next four years alone. The network outfitter Cisco issued that forecast in June It said just under one zettabyte (1,000,000,000,000,000,000,000 bytes) of data will be transmitted over IP networks in The worldwide IP data traffic from businesses will triple in this same period and reach 10.1 exabytes a month in IP data traffic is currently increasing at a rate of 32 percent a year.there are many different reasons for this rapid growth in bandwidth demand. For one thing, private use of the Internet is constantly increasing. From 2001 to 2010 alone, the number of Internet users increased from 37 percent to 72 percent, thus nearly doubling. At the same time, people want ever-faster access. The flood of data is being pushed to ever-greater volumes with flat rates and Internet telephony, cloud computing and online navigation, mobile Internet with smart phones or tablet computers and video on demand. In the business realm, the upsurge in bandwidth is being driven by cloud computing services, group-wide networking,remote access to company networks, remote sessions and in particular by data-hungry video conferences.the data volumes currently demanded in backbone cabling can still be handled with 10 Gigabit Ethernet(GbE), but the forecast trends will require the introduction of the next technologies, 40 GbE and 100 GbE 2

3 G 40G 10G Millions /100 GbE in the not too distant future The new transmission technologies 40 GbE and 100 GbE were enacted in June 2010 with the standard 802.3ba. To achieve practical lengths for these large bandwidths, too, data centers have to operate several of the existing copper cables or optical fibers parallel to each other. Once again there are varying transmission technologies and distances resulting from this situation, both dependent on cable type. The table below provides an overview: Transmission technology Cable type Signal routing Maximum distance 40GBASE-KR4 PCB(bus) 4 10Gb/s 1m 40GBASE-CR4 Copper,Twinax 4 10Gb/s 7m 40GBASE-SR4 Multimode,OM3 Multimode,OM4 4 10Gb/s 100m 150m 40GBASE-LR4 Singlemode 4 10Gb/s(CWDM) 10km 100GBASE-CR10 Copper,Twinax 10 10Gb/s 7m 100GBASE-SR10 Multimode,OM3 Multimode,OM Gb/s 100m 150m 100GBASE-LR4 Singlemode 4 25Gb/s(DWDM) 10km 100GBASE-ER4 Singlemode 4 25Gb/s(DWDM) 40km 3

4 It quickly becomes apparent that the use of copper cables for transmission of 40/100 GbE is critical. Lines seven meters in length pose problems but so too does the laying of ten lines parallel to each other. Given the cramped space in cable runs and the difficulty of cooling them, the use of copper seems questionable. In the connection area, too, Twinax cables need more space than multi-fiber connectors (MPO/MTP, refer to Chapter 2) for optical fibers. From today's perspective, the use of copper cables -- whether as Twinax or as twisted pair Cat. 7 does not appear to be a reasonable approach, technically or economically. Category OM3 and OM4 optical fibers are the compelling solution for future-safe cabling in data centers given their much longer transmission distances and more compact design. OM3 has a link length of 100 meters so it supports about 85 percent of all data center channels depending on architecture and size; OM4 fibers have a link length of 150 meters so they cover nearly 100 percent of the required reach. 2. VLINK products for 40/100GbE 2.1 Introduction of VLINK Optics Corporation VLINK Optics Corporation is a manufacturer and supplier of the fiber optical connectivity and micro-link products. VLINK researches, designs, builds and markets the best high-end optical transceivers interlink products. We focus on the development of high-speed optical modules connectivity devices with micro size, low power loss, low cost, to provide the best-of-breed optical fiber interconnect solutions for customers in areas. Our value proposition is our leading-edge optical component and packaging technology, high speed optical connectivity design know-how, and unique low-cost process capability. Vlink products are applied to Data Center Cable Connectivity, Silicon Photonics Module inter fiber connection, coherent transceiver input ports. Vlink has established over 600 suare meter 100 class clean room and owns JGR optical insertion loss and return loss test system and xxx 3D geometry test system. 4

5 VLINK established company quality police to meet customer satisfying goal - "Innovation,, Improve continuously, reduce cost, delivery on time, in good condition and in conformance.". 2.2 MPO Products from Vlink for 40/100 GbE Parallel optical channels with multi-fiber multimode optical fibers of the categories OM3 and OM4 are used for implementing 40 GbE and 100 GbE. The small diameter of the optical fibers poses no problems in laying the lines, but the ports suddenly have to accommodate four or even ten times the number of connectors. This large number of connectors can no longer be covered with conventional individual connectors. That is why the 802.3ba standard incorporated the MPO multi-fiber connector for 40GBASE-SR4 and 100GBASE-SR10. It can contact 12 or 24 fibers in the tiniest of spaces. This chapter describes this type of connector and explains how it differs from the much improved MPO connectors of the kind VLINK offers. 5

6 2.2.1 A glance of mpo products from VLINK Vlink is USCONEC Direct Distributor MPO ferrules Light Turn optical module MPO parts and components MTP Products MT Jumper for QSFP(INCON) MTP OM3 Jumper and MTP Cassette for 40/100G Base SR4/SR10 MTP Fan-out and Module For Data center 2 12F -2 12F MTP OM4 Jumper 2 12F-24F MTP OM3 Jumper MTP Loopback 6

7 2.2.2 All kinds of solutions of MPO cables Driven by an increase in fiber counts and larger cables for specialty applications. Round cables are more flexible and have improved mechanical performance especially with fiber counts greater than MPO cables make high density card come true 1.Extract and insert MPO connector with Push/Pull tab. Required for high density card edge applications 2.Standard round jacketed 3.0 or 3.6mm OD 3.For field or factory installation 7

8 2.2.4 MPO optical modules Markets: Parallel Optics TxRx Medical Aerospace/Military Capabilities: High precision custom molding Insert molded lenses, pins Polymer lenses Connector, component design Custom pins Precision metal fabrication 8

9 2.2.5 VLINK customized products On the premise of comply with relevant industry standards, VLINK Provide the specific requirements of the customers in various applications and specifications of the products, including: special fiber; special ferrule; special component; special length; special technology; special performance; special purpose; special specification. SR4 Jumper Loopback Tseter OM3 Cable PSM Jumper 9

10 % tested=100% quality The tight tolerances VLINK set are tougher than those in EN and ensure the top quality of the connectors. But 100 percent testing during production is what guarantees compliance with these tolerances. VLINK therefore subjects all connector endfaces to an interferometric inspection (Figure as follow). Defective ferrules are reworked until they comply with the specified tolerances. Besides, Each procedure in the process of production, VLINK can always use various high-precision equipments to insure the size; parameter; cleanliness meet customer requirements. 10

11 If you want to know more about VLINK, you can search under Products. 11

12 3. Summary The need for bandwidth continues to rise steadily and the next technologies are already waiting in the wings with 40 GbE and 100 GbE. Data centers will make broad use of FO lines even though copper solutions involving parallel twisted-pair cables will continue to be justified for short links. A look in the labs where engineers are already working meticulously on 1000 GbE confirms this general trend all the more. With the currently available category OM3 and OM4 multimode FO lines, the required bandwidths can only be implemented using parallel optical connections. Single-mode fiber optics are only feasible for longer links for economic reasons. There is a big choice of the necessary passive and active components available and as installation increases, the market prices will continue falling. Given the technical and economic advantages, managers in data centers should get an early start in converting their infrastructure to parallel optical systems based on MPO/MTP. Anyone wanting to install a new system or upgrade an old one will opt for this technology anyway. The fear of fixed lengths of pre-terminated trunk cable is certainly not wholly unjustified. You can rid yourself of this fear, however, if you plan well with a partner you can trust. Moreover, trunk cables have definite quality and cost advantages over splice solutions. VLINK is a reliable partner for you. Not only can it supply you with all components in top quality, it also assists you competently with all questions involving planning, installation and maintenance. 12