12-05-2011, 04:22 PM
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Introduction
Lig The light peak technology is a high speed optical cable technology used to connect peripheral devices to the computer via an expansion bus and using the same port. It is developed by the Intel corporation and brought to market by the Apple Inc in its upcoming version of MacBook Pros. It provide a high bandwidth and faster data transfer speed ranging from 10gb/s up to 100gb/s.
Light peak combines PCI Express and DisplayPort into a new serial data interface that can be carried over longer and less costly cables. Multiple devices can be connected simultaneously as it can support multiple protocols. Also it can be used a single universal replacement for all the current bushes.
History of connectivity:
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Key characteristics:
• peak implements optical technology
• it implements the principle of total internal reflection
• data is transferred through the optical fiber cables
•
• provide multiple connection channel and can connect multiple devices simultaneously using the same port.
• Support bi-directional transfer
• Hot-pluggable
Description:
The light peak technology is comprised of following components:
• An Optical fiber cable
• A controller
• An optical module
• A connector in each device
Optical cable: the data is transferred through the optical fiber cable which is made up of glass and it is plastic coated. It also contains copper wire to power devices which are connected to it. The optical cable is 125nm in diameter and can support data transfer up to 100 mts.
Controller: the controller chip is the main component used in Light Peak. It provides protocol switching capabilities to support multiple protocols over a single cable. It also provide priority based transfer by assigning priorities to different devices and applications used.
Optical module: the optical module convert the electrical signals into the photons which are transferred over the optical cable. The conversion is done using a special VCSEL(vertical cavity surface emitting lasers). The optical module drives two optical ports.
Connector: the connectors are located at end of the optical cable, it allow fast removal and insertion. Light peak uses the smaller ports which are suitable for the laptops.