O-band Optical Amplifier in Telecommunication Systems

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Working and Role of O-band Optical Amplifier in Telecommunication Systems

It is essential to compensate for the loss of attenuation within the fiber to transmit signals over long distances (> 100 km). Earlier, this was used to achieve using the set of four devices, including an optoelectronic (OE) module, which consists of an optical receiver, a regeneration system, and an optical transmitter.

These electronic regeneration systems were later replaced by optical amplifiers such as O-band optical amplifiers because of the high conversion time of OE modules.

This blog presents the working and applications of state-of-the-art amplifiers for telecommunications systems.

Working of Typical O-band Optical Amplifier

Despite its name, the laser is an analog to an oscillator rather than an amplifier. In an electronic oscillator, the amplifier is provided with the positive feedback tuned to a particular frequency. Besides, any electrical disturbance of the appropriate frequency taking place at the input will be amplified when turned on.

The input signal is amplified using the amplifier device, and the output signal is fed back as an input. The process goes indefinitely until a significant production is made. The o-band optical amplifier or any other type of amplifier reaches the maximum point at high input voltages since it cannot develop higher output than the source voltage.

At the frequency of the resonant amplifier, the process enters a steady state where it produces an output signal.

Positive feedback can be achieved by placing the gain medium in an optical resonator. Any random transition between suitable energy levels in which the emitted photon moves along the device axis provides the initial stimulus.

The signal gets amplified when it passes through the resonator’s medium. The o-band optical amplifier saturates as the oscillation power increases and the gain falls below its original value. When the diminished gain equals the loss, a stable state is achieved.

The gain then only compensates for the loss in order to repeat the amplification and feedback cycle without modification, and there is a steady-state oscillation. By making mirrors partially transparent, we can achieve output coupling.

The Role of O-band Optical Amplifiers in Telecommunication Applications

For telecommunications, optical amplification is of strategic significance.

The signal that carries the data needs to be amplified in long-distance communications, whether it goes via wire, fiber, or wave. This can be achieved in fiber optical communications in many ways: by converting the optical signal into an electronic one using an optical amplifier.

Optical transmission media positively influence the efficiency of a communication system. Fiber optics is one of the transmission media capable of transmitting high-capacity, high-speed, and low attenuation information.

Optical amplifiers such as O-band optical amplifiers compensate for long-distance link transmission losses and access network branching losses while eliminating expensive two-way conversions between optical and electrical signals at the same time.

Inphenix is a laser and light source manufacturer based in the USA. Along with O-band optical amplifiers, the company also manufactures an extensive range of distributed feedback lasers, VCSELs, and swept-source lasers, amongst others.

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