AN002 Last Updated June 30, 2014
Telecommunications services, entertainment services, and internet services will all reach their greatest stride when providers of these services have deployed fiber optic cables that go all the way to the customer premises. The quality of services at this phase of deployment will reach its peak in terms of bandwidth and interference immunity. However achieving this is not without its challenges. One primary obstacle is the degradation of optical signals over long distances. By the time a signal has gone from its source to the destination it has been amplified over several links at repeater stations. At the home, where the quality of the signal counts the most, it will be best for service providers to amplify the signal before presentation to the user’s equipment. The Power Integrating Module with Pulsed Driver (POWIM-PD) will provide this amplification option in a way that telecommunications companies and other providers who source their own power to the system will be accustomed to. It will provide them with the option of offering robust and power grid fault tolerant services that can operate from the home provided power or the service provider’s power. To be able to drive a laser diode in this way is a competitive feature to a service provider.
The Power Integrating Module with Pulsed Driver is a circuit that has two power inputs. One power input is designated the main power and it is the higher of the two inputs. The other power input is a backup or reserve power source and it is lower in voltage than the main source. The voltage level of the main power is around 13.5V and the backup power is from 12V to 10V. Refer to the data sheet of the device for more details.
Now say that the main power is the electricity from the customer and the backup power the electricity from the service provider. The POWIM-PD device will work as follows. As long as the customer’s power is above 12V it will be allowed to drive the load. If the customer’s power falls below 12V the service provider’s power will drive the load until the customer’s power comes back up. The switching is done automatically by the power integrating module. This is not a new function in itself, but to have this function attached to a laser driver is new. Using the Power Integrating Module with Pulsed Driver, optics applications can be driven by two independent power sources.
© 2014 Plane Space Design