Semiconductor Optical Amplifiers (SOAs): No Feedback Laser Diode

https://www.inphenix.com/en/semiconductor-optical-amplifiers/

A Semiconductor Optical Amplifier is essentially a laser diode (LD) with no feedback from its input and output ports and hence is also referred to as a Traveling-Wave Amplifier (TWA). SOAs have proven to be versatile and multifunctional devices that are key building blocks for optical networks.

#SemiconductorOpticalAmplifiers should have the highest gain appropriate to the application.