In this paper, we present and give details about the conception and realiza
tion of the first monolithic long wavelength vertical-cavity surface-emitti
ng laser (VCSEL) operating continuous wave at room temperature. This approa
ch relies on two originalities: a metamorphic GaAs-AlAs distributed Bragg r
eflector and an injection through a reverse-biased tunnel junction. Record
output powers as high as 1 mW and a maximum operating temperature of 47 deg
rees C have thus been achieved. Furthermore, in this paper, we present the
optimization work on the different constituting parts of the VCSEL.