An effective indicator for evaluation of wavelength extending InGaAs photodetector technologies

An effective indicator for the evaluation of wavelength extending InGaAs photodetector and focal plane array technologies is demonstrated. The validity of the indicator has been confirmed using data from different categories including our works. Based on a formula with two meaningful parameters, the indicator could be a practical index for system designers to estimate the performance of wavelength extending InGaAs PDs and FPAs based on the same technology; and a useful criterion for device developers to improve their technology.