This paper aims to report the compressively strain effective gain optimization of type-I graded refractive index (GRIN) InGaAlAs/InP nano heterostructure. Through the modeling and mathematical simulation, we study the behaviors of optical and modal gain spectra with lasing wavelength. Moreover, we study the effect carrier injection density on the differential gain and current density effect on modal gain. In addition, the compressive strain response to the optical wavelength has also been observed. These studies explain the tunability of the studied heterostructure and beneficial for the optical sources.

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