High reliability of the VCSEL is essential in many applications. Ongoing life-testing, in combination with accelerated stress tests at high temperatures, indicate rates of random failure and wear-out of Vertilte VCSELs are very low and project stable long-term operation.

Figure 1. Accelerated lifetest of VCSEL single emitters at 95 °C heatsink temperature (left), and LIV curves of one 1-Watt array after aging at 85 °C for different hours (right).