High efficiency high-power uncooled CWDM4 wavelength CW-DFB lasers

We demonstrate high 75ºC power conversion efficiencies of 19% to 26% at 100 mW (1mm cavity) and 16% to 22% at 200 mW (2mm cavity) for CW-DFB lasers with single-mode operation across CWDM4 wavelengths.