The Using EDFA Optical Amplifier in the CATV1550nm system, the signal can be distributed to a large number of end users and long-distance users.
The front-end system structure of the 1550nm network is shown in the figure below.
Generally, it is composed of an externally modulated transmitter and an optical amplifier. The optical power output by the EDFA Optical Amplifier is distributed by a splitter and then sent to each township computer room, and then distributed to each optical amplifier by a splitter, and then distributed in a star form. to each administrative village, and then distributed by a splitter and sent to each optical receiver.
In the 1550nm network system, after passing through EDFA Optical Amplifier, the network only sacrifices a certain amount of carrier-to-noise ratio CNR, while cso and CTB are basically not affected.
After technical processing, the Stimulated Brillouin Scattering (SBS) and dispersion of the optical fiber are effectively controlled. 1. The 1550nm system can pass high-power output on long-distance transmission (<200km), and the CNR, cso, and CTB indicators can reach level 4.

Erbium-Doped Fiber Amplifier  ,also call EDFA Optical Amplifier , is a critical component in optical communication systems. It is a type of optical amplifier that uses erbium-doped fiber to amplify optical signals.

The principle behind EDFA is based on the interaction between erbium ions and light signals. The erbium-doped fiber contains erbium ions that can absorb light at a specific wavelength, typically around 1550 nanometers. When an incoming weak optical signal passes through the erbium-doped fiber, the erbium ions are excited and release additional photons that align with the original signal’s wavelength. This process, known as stimulated emission, amplifies the optical signal without the need for conversion to an electrical signal.

EDFA Optical Amplifier are widely used in optical communication systems to boost the power of optical signals and extend the transmission distance. They are particularly effective in long-haul fiber-optic networks, where signals may weaken over long distances. By amplifying the signals optically, EDFA Optical Amplifier overcome the limitations of electronic amplifiers and enable efficient long-distance transmission without the need for costly regenerators.

One of the advantages of EDFA Optical Amplifiers is their wide amplification bandwidth, which allows them to amplify signals across a broad range of wavelengths simultaneously. This makes them compatible with various optical transmission systems, including wavelength-division multiplexing (WDM), where multiple signals of different wavelengths are transmitted over a single fiber.

EDFA Optical Amplifier is working well on increasing the reach, capacity, and performance of optical communication systems.
EDFA Optical Amplifiers are like superchargers for optical networks. They are in charge of  data, voice, and video signals can travel long distances without losing their strength. 

This is important for high-speed internet, clear phone calls, and crisp video streaming, especially when you need to send these signals across vast networks. Without EDFA Optical Amplifiers, the signals would weaken and lose their quality over long distances, causing delays and interruptions.

So, EDFA Optical Amplifiers are like the superheroes of optical networks, making sure that your data, voice, and video signals reach their destination with minimal loss and degradation.
Their reliability, high gain, and low noise characteristics make them indispensable in modern optical communication infrastructures.
Please contact HYD TECHNOLOGY for your project .

The principle of an Erbium-Doped Fiber Amplifier ,EDFA Optical Amplifier is based on a process called stimulated emission. Inside the EDFA, there is a special type of fiber called erbium-doped fiber. This fiber contains erbium ions, which can absorb and emit light at a specific wavelength.

When light travels through the erbium-doped fiber, the special particles called erbium ions inside the fiber get energized by the light’s power and soak up the light.
This absorption process transfers energy to the erbium ions, raising them to a higher energy state.

When these excited erbium ions are stimulated by another light source at the same wavelength, they release the energy they absorbed earlier in the form of additional photons. These new photons align with the original signal’s wavelength and travel along with it, effectively amplifying the signal’s power.

This process is called stimulated emission, and it leads to the amplification of the optical signal without the need for external power sources or active electronic components.

In simpler terms, the EDFA Optical Amplifier uses a special type of fiber that contains special ions. These ions absorb the incoming light and then release more light of the same wavelength, which strengthens the original signal. It’s like having a boost button for your optical signals, allowing them to travel longer distances without losing their strength.

The principle of the EDFA Optical Amplifier  is a fundamental concept in optical communication, and it plays a crucial role in extending the reach and improving the quality of optical signals in long-haul fiber-optic networks.

Please contact HYD TECHNOLOGY for your project .

EDFA Optical Amplifier are widely used in optical communication systems for various purposes. Some of the key applications of EDFA Optical Amplifier include:

1. Long-haul optical transmission: EDFA Optical Amplifiers are used to boost the optical signals in long-distance fiber-optic communication networks, allowing signals to travel over hundreds or even thousands of kilometers without significant loss.

2. Telecommunications networks: EDFA Optical Amplifiers play a crucial role in enhancing the signal strength and extending the reach of optical signals in telecommunications networks, enabling reliable and high-speed data transmission.

3. Optical backbone networks: EDFA Optical Amplifiers are essential components in the backbone networks that connect different locations and data centers, ensuring efficient and reliable transmission of large volumes of data over long distances.

4. Internet infrastructure: EDFA Optical Amplifiers are utilized in the infrastructure supporting the internet, including undersea cables and network nodes, to amplify optical signals and maintain signal integrity across vast networks.

5. Cable television (CATV) systems: EDFA Optical Amplifiers are employed in CATV systems to amplify optical signals carrying television channels, ensuring high-quality signal distribution to subscribers.

6. Dense wavelength division multiplexing (DWDM) systems: EDFAs are integral to DWDM systems, where they amplify multiple optical signals of different wavelengths simultaneously, allowing for increased capacity and efficient utilization of the optical spectrum.

Overall, EDFA Optical Amplifiers play a crucial role in enabling efficient and reliable optical communication by boosting the power of optical signals, extending their reach, and ensuring the seamless transmission of data, voice, and video signals over long distances in various applications.

Please contact HYD TECHNOLOGY for your project .

EDFA Optical Amplification Mechanism
The amplification process of EDFA is actually similar to the generation process of laser, that is, the process of stimulated radiation of ions under the reverse distribution of particle number. The schematic diagram of the three key processes of amplification is in the ground state or low energy state E1 land.
When it absorbs a photon hv with appropriate energy, it will go to the excited state or high energy state E2. The energy difference between E1 and E2 is exactly equal to the energy hv of the absorbed photon, E2-E1=hv where h is Planck Constant, the process that the frequency of the absorbed photon or light wave makes the atom rise from a low energy state to a high energy state is called pumping or pumping.
This method of pumping by absorbing photons, that is, using light, is called optical pumping.
An atom in a high-energy state is unstable, and it will transition back to a low-energy state in a non-radiative transition, and the rest of the energy is released in the form of heat or phonons rather than in the form of light.
It may also be a radiative transition, and the rest of the external energy is released outwards in the form of photons or light waves, that is to say, when the transition returns, a photon h will be emitted outwards, and its energy is the energy difference between the two energy states.
There are two ways of radiative transition, one is spontaneous emission and the other is stimulated emission. The so-called spontaneous emission refers to the fact that atoms in a high-energy state will naturally fall back and forth after a period of time without any external factors. to a lower energy state and emit a photon h.

The so-called stimulated radiation refers to that the atoms in the high-energy state E2 transition from the high-energy state E2 back to the low-energy state E1 when they are affected or induced by the incident photon of energy equal to E2-E1, and at the same time emit a photon h that should be stimulated The radiated light and the incident light have the same frequency, phase, and direction. This kind of radiation is also called coherent radiation. Using this stimulated radiation, one photon is input, and two photon outputs can be obtained, so that the incident light is amplified.
In thermal stability, the electron density in the excited state is very small.
Most of the incident photons are absorbed so that the stimulated emission is practically negligible. Only when the number of electrons in the excited state is greater than the number of electrons in the ground state can the stimulated emission exceed the absorption of light.
This situation is called population inversion Since this is a non-stationary state, various “pump” techniques are necessary to achieve population inversion
Which wavelength to choose for pumping and the wavelength band that can be amplified depend on the energy level structure of the gain medium. For doped fiber amplifiers, the gain medium is single-mode quartz doped with rare earth element bait ions (Er3+) in the fiber core. Optical fiber. Ions have many absorption bands. Photons of different wavelengths can be absorbed on these absorption bands. The schematic diagram of the absorption wavelength corresponding to the transition between the high energy level and the ground state is shown in
Due to the fine structure and symmetrical broadening of each energy level, the absorption and emission spectral bands are peaked at these wavelengths when stimulated emission or absorption actually occurs.
One of the spontaneous emission wavelengths near 1530nm has a relatively high lifetime (about 10ms), and the lifetimes of other energy levels are very short [microsecond level].
Therefore, other high-energy bands are used as pump bands, and the adjacent energy level of 1530 acts as a metastable state for amplification, and when the adjacent energy bands corresponding to 807nm and 665nm are used for pumping, they have strong excited state absorption (ESA ), resulting in a waste of pump energy, while there is no ESA at 1480nm and 980nm, and the pumping efficiency is high.
Therefore, only 1480nm and 980nm wavelength lasers are currently used as pump sources. The simplified energy level diagram of ions is shown in Figure 2.3 below.

When a pump laser emitting 980nm photons is used to encourage ions, the electrons in the ions transition from the ground state to the pump energy level, as shown in the transition process O in Figure 2.3. These excited ions decay from the pump band to the metastable band ( relaxation) very fast (within about 1!).
As shown in the transition process 2 in the figure. During the decay process, the extra energy is released in the form of phonons, or equivalently considered to generate mechanical vibrations in the fiber. In the metastable energy band, the electrons of excited ions will move to the bottom end of the energy band, where people use the fluorescence time to characterize this process, which is as long as about 10ms.
Another possible pump wavelength is energy, just slightly higher.
Absorbing a pump photon at 1480nm will directly excite an electron from the ground state to the top of the metastable energy level which is rarely occupied by particles.

As shown in the transition process 3 in Figure 4.3, these electrons will then move to the lower end of the metastable state with a large number of particles (transition process 4). The electrons in the metastable state, when there is no external incentive for photon flow, part of will decay back to the ground state, as shown in transition process 6 in the figure.
This phenomenon is the so-called spontaneous emission, which causes noise in the amplifier. When a signal photon with an energy corresponding to the band gap energy from the ground state to the metastable state flows through the device, two types of transitions occur.
First, ions in the ground state will absorb some of the local photons, so these ions will transition to a metastable state.

As shown in the transition process @ in Figure 4.3; secondly, in the stimulated emission process (transition process O), the signal photon triggers the ion in the excited state to drop to the ground state, thereby emitting a wave vector with the same energy as the input signal photon and new photons of the same polarization state.