GaN-based semiconductor optical amplifiers (SOAs) have the ability to boost the output power of laser diodes and thus are candidates for a broad variety of potential uses. Applications that utilize short wavelength, ultrafast pulses, including microprocessing, orthoptics, and next-generation. GaN-based material can potentially cover a wide spectral emission range, and laser di‐odes emitting in the UV, violet, blue, green, and red wavelengths have already been dem‐onstrated and/or commercialized. The compound is a very hard material that has a Wurtzite crystal structure. The operational amplifier includes four stages, first stage is dual input balanced output differential. The world of audiophile amplifiers is having a sea change thanks to GaN technology – a new kind of semiconductor material, ideal for high speed MOSFET used as power device in switching amplifier (better known as Class-D amps).
