Laser systems with a semiconductor optical amplifier and optical-power-to-electrical-current feedback

Area of Science:

• Photonics and Laser Technology
• Semiconductor Devices
• Optical Engineering

Background:

• Pulsed fiber laser systems often rely on saturable absorbers for stable operation.
• Semiconductor optical amplifiers (SOAs) offer potential for laser design but require stabilization methods.
• Achieving stable pulsed operation in SOA-based systems is crucial for various applications.

Purpose of the Study:

• To investigate a novel method for stabilizing pulsed operation in semiconductor optical amplifier (SOA)-based fiber laser systems.
• To demonstrate the effectiveness of optical-to-electrical feedback as a stabilization technique.
• To achieve stable pulsed output without employing saturable absorber elements.

Main Methods:

• Numerical modeling of a semiconductor optical amplifier (SOA)-based fiber laser system.
• Implementation of an optical-to-electrical feedback loop.
• Utilizing a controller to adjust the SOA's current based on feedback.

Main Results:

• Successful stabilization of pulsed operation in the SOA-based fiber laser system was achieved through numerical simulation.
• The optical-to-electrical feedback mechanism effectively controlled laser output.
• Elimination of the need for saturable absorber elements was demonstrated.

Conclusions:

• Optical-to-electrical feedback is a viable and effective method for stabilizing pulsed operation in SOA-based fiber lasers.
• This approach offers a simpler and potentially more robust alternative to traditional methods using saturable absorbers.
• The findings pave the way for more reliable and efficient pulsed laser systems.