It is based on the value of the edge coefficient I obtained, for Germanium at the wavelength of 1550 nm has a value of 459.54 / cm and GaAs at wavelength 885.6 nm has a value of 239.78 / cm.(adsbygoogle = window.adsbygoogle || []).push({});

If based on the theory of absorption depth (1 / alpha), then the optimal thickness of GaAs is thicker than Ge, and to my knowledge,this seems to be wrongin the application, can anyone explain? Is there something wrong with my understanding?

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# I Why is the absorption depth for GaAs more than for Germanium?

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