What is a power amplifier
The first core is to support the signal to be amplified and the second core to support the pump wavelength. These amplifiers are also pumped with multimode pump lasers and the fiber is based on a double cladding structure. Amplifiers based on co-doping the fiber core with ytterbium and erbium are typically used.
WHAT IS A POWER AMPLIFIER TV
15.2.5.1 Amplification in cable TVĬable TV providers use high power amplifiers to support the large number of node splits required for the operating region. When this happens, the current technology may not be sufficient to support the low cost required and the market will start to look for innovations to put it on a new cost curve. But the bandwidth requirements are increasing and the market is reaching the point where amplification may be needed in the next few years at the end user. To date, the transmission rates and distances are sufficiently reasonable that vendors don't need amplifiers at the end user. Optics has proliferated to the end user in access networks and the cost pressures are even more severe as it is a per user cost that has to be minimized. As a consequence of the reduced number of users per line, the price demands are more stringent than those in the core. But cost requirements intensify sharply for equipment in the metro and in access segments of the market. Each line represents large volumes of traffic so the cost of amplification is shared. Much of the amplification discussed so far is in the core of the network. Each interaction between the transistors is evaluated using this method.ĭaryl Inniss, in Optically Amplified WDM Networks, 2011 15.2.5 Amplification in access networks The thermal interaction of T2 on T1 is evaluated by comparing the maximum temperature value in this configuration with the temperature of T1 when it is alone in an active state. The “power bar” of T1 and T2 is active, and the other transistors are inactive. For instance, the influence of transistor T2 on transistor T1 is evaluated by considering these transistors as being active. In order to evaluate the thermal interaction between the transistors, a collection of nonlinear analyses is carried out in steady-state conditions. The second step uses this temperature distribution as an external load to the mechanical model for calculating mechanical deformations. The base plate temperature is set at room temperature as a boundary condition. The first step consists of calculating the temperature distribution by considering a thermal flow over the transistors’ active surfaces. For a color version of the figure, see The calculation is done in two steps with the ANSYS® software. Composition of simplified FE model of power amplifier.