Abstract

Since the first realisation of visible red VCSELs by Schneider et al. in 1993 [1], these devices are attracting more and more interest by science and industry because of their promising application in plastic fiber communication systems. In this paper we want to present our approach to realize red VCSELs. The most important key points are as follows:

• Choice of the material system: We use AlAs/Al_0.5Ga_0.5As for the Bragg Mirrors and (Al₆₆Ga₃₄) ₅In₅P / (Al₃₃Ga₆₇) ₅In₅P / Ga₄₀₄In₅₉₆P for the active region (quantum well thickness is 6nm).

• Choice of number of Bragg Mirror pairs as well as standing wave design in the optical cavity: We use 55/36 mirror pairs for the n/p - side. We also made investigations to reduce the number of mirror pairs. Our devices have a 3/2λ-cavity with a node of the electric field at the interface of the optical cavity and the mirror (This is to reduce possible absorption at the P/As interface)

• Match the optical cavity with the Bragg mirror reflectance, as well as the emission wavelength of the quantum well. We also investigated the effect of gain detuning with respect to the cavity

© 2000 IEEE