标签归档:fiber optic transceiver

The Chanllenges of Technology And Cost 100G Faced

More and more high bandwidth services such as high definition(HD) video, online games and video conference challenging the traditional network, 100G as a ease network bandwidth technology, becomes the new hope of the operator.

100G industry chain has matured, with all components and subsystems have commercial capacity of multiple manufacturers, the market also needs the support of 100G system, the backbone network will be fully transferred to the 100G-leading era. From the early 2013, the focus point of 100G is from the laboratory into 100G network deployment and the commercial 100G has started.

Four Technical Challenges Of 100G

Although the 100G has been carried out, but the 100G transmission technology meets four technical challenges.

First, high power consumption. The achievement mechanism of 100G technology is complex, the optical receiver requires the use of coherent reception and processing of the DSP, the key chip has no ASIC, resulting in high power consumption of the whole 100G system. When large-scale commercial 100G technology, the average power consumption of each wavelength is still a problem waiting to be solved. Currently the power consumption of per wavelength is above 200W, the average power consumption of per frame is 7000W, so there will need three frames. Obviously, the 28nm process can help to reduce energy consumption, but there is no 100G solution of 28-nanometer. In addition, although the light energy consumption is not large, but due to the use of next-generation fiber optic transceiver will increase greatly, reducing the power consumption is very necessary.

The second is integrated, especially in the field of optical circuit and photoelectric integration. How to add mass active and passive optical devices such as laser, fiber optic amplifier, wavelength division multiplexing(WDM) and transmitter/receiver to the network to achieve highly integrated? Using semiconductor technology to the integration of CWDM and laser?

The third is test. The challenges of 100G testing include the quality evaluation of the deployed 100G system signal and the system maintenance after deployed. 100G using polarization multiplexing, and the signal spectrum is wide, the common OSDR and test instruments can not real-time test it, only by shutting off the laser method. How to achieve real-time test is industry’s future research topic, many of today’s online testing system are worth studying.

The Fourth is few prospective studies. How to make the current transmission system gradually shift to user-oriented management from the traditional network management? Quickly and efficiently allocate the physical resources?

The key is the problem of cost

The key reason why 100G failed to be applied large-scale currently is the opportunity cost is relatively too high. In the era of 100G, the cost of optical module is very high. The mainstream CFP module, the actual sales price is more than $10,000. From the point of optical module cost, 100G module is several times higher than 10G optical module. It also requires manufacturers continue to make efforts in chip integration, integrated optical module miniaturization and system design, to achieve the overall cost of products are reduced.

Especially the regard of optical module technology, the cost of this part is the key of the whole 100G system cost, the optical module itself has to face the challenges of control power consumption and improve board integration.

MSA to Boost 400Gbps Copper Network Cable and Optical Fiber Transceiver market

Five leading global companies plan to come to an agreement of multiple sources (multi – source agreement, MSA) to create CDFP (400Gbps form – factor pluggable) industry alliance, defines fiber optic transceiver module/plug and mainboard electric mechanical dimension edge connector .

New CDFP MSA aims to regulate and encourage 400Gbps hot swap module’s  development and commercialization, this module integrates 16 transport channels to receive 16 channels, supports passive and active copper networks, as well as the active fiber optic module.

Brocade, senior technical personnel said: “we expect this high integration fiber optic transceiver module allows network equipment maker has high density and higher data throughput of 400Gbps system solutions, MSA group plans to develop specification details, to promote the industry using compatible high density products.

CDFP MSA vendors are interchangeable in terms of mechanical and electrical products, this project will set electrical interface, optical interface and mechanical interface, may include optical fiber connector and plug with cable plug, electrical connectors, guide rail, the front panel and the main PCB layout requirements. Moreover, MSA specification is expected to include thermal, electromagnetic and electrostatic discharge design.

Molex group product manager Scott Sommers, said: “through the establishment of the front panel, the hot swap of 16 channel 400Gbps module of multiple sources of compatible, the collaboration is committed to increasing customer choice and ensure interoperability and interchangeability, fundamentally promote the whole copper and fiber optic transceiver market more rapid development.”

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