http://www.compoundsemiconductor.net/article/94729-vcsels-beyond-red.html
Still, Gaurav is adamant GaAs will retain largest market share. "Designing a device structure that can be manufactured with as low cost as the 850 nm GaAs-based VCSELs is still a major challenge for the rest of the industry," he adds. "GaAs is expected to lead the market in the near future."