The products CLD-FDxx are directly modulated 10Gbps 1310nm Fabry-Perot edge-emitting laser diode chips with operating temperature range from –40°C up to 85°C. The design is a Ridge Waveguide on n-type substrate with multi-quantum well (MQW) active layers. These products utilize a high-speed laser design, and regular codes printed on the top surface of each chip for identification purpose. All the laser chips come from the certified wafers which must achieve an acceptable yield for burn-in, aging tests, and each shipped laser chip is fully screened.