The working principle of a Fiber Booster Amplifier is primarily based on the principle of stimulated emission. Here's a detailed explanation:
- Gain Medium: The fiber in a Fiber Booster Amplifier is doped with certain ions, such as erbium (Er) or ytterbium (Yb). These doped ions serve as the gain medium.
- Pumping Process: Pump light is provided to the doped fiber, typically by a laser diode coupled to the fiber. This pump light excites the doped ions to a higher energy level.
- Stimulated Emission: When the excited ions return to their lower energy state, they release energy in the form of light. This process is called stimulated emission. The energy released is transferred to the signal light passing through the fiber, thereby amplifying the signal light.
- Signal Amplification: As the signal light travels through the doped fiber, it interacts with the excited ions, resulting in the amplification of the signal. This process is also known as light-to-light conversion.
In summary, the Fiber Booster Amplifier uses doped fiber as the gain medium and amplifies the signal light by transferring energy from excited ions to the signal light through stimulated emission. This process allows for the enhancement of the signal's power, making it suitable for various applications in fiber optics and communications.
