Characterization of the semiconductor optical amplifier for amplification and photonic switching employing the segmentation model

Abstract

This paper characterizes the gain and the carrier density responses of a semiconductor optical amplifier (SOA). In order to achieve the switching functions in SOA-based optical switches, such as Symmetric Mach-Zehnder (SMZ), the effect of the input signal on the total gain response of the SOA is investigated. The theoretical operation principle is demonstrated using a segmentation model that employs the complete rate equation with third order gain coefficients. Results obtained show the input boundaries and requirements in which the SOA can be efficiently used as an amplifier and as a switch.

Dynamics and its Effects on Saturation Region in Semiconductor Optical Amplifiers

“…An important parameter to take into account is gain (G). This parameter is perhaps the most essential and can be considered as a parameter for OA operation [14].It directly effects the saturation region. The function of any optical amplifier is to increase the optical signal power.…”

“…Actually, when is saturated to be as high as possible. In this case, 𝑃 𝑜𝑢𝑡 can take the form according [14]…”

“…The energy of photon is represented byℎ𝑣, 𝑎 ° is the coefficient of differential gain, 𝜏 𝑐 is the carrier lifetime, and Γ is the confinement factor [14]. To realize large 𝑃sat, out , the gain medium must be pushed to the saturation depth where 𝑎 °is small [17].…”