SemiWadi, Jordan's pioneering semiconductor company based in Amman, offers innovative, high-performance analog and mixed-signal solutions that drive industry transformation. Discover how Lumentum enables innovation through optical and photonic technologies for cloud networking, 3D sensing, lasers, and advanced manufacturing. Compare the best companies of Laser Diode keyword. What Is a Laser Diode? What Is a Laser Diode? A laser diode is a device. Laser diodes (LDs) are semiconductor lasers where the optical gain is generated by an electric current flowing through a p–n junction. They convert electrical energy directly into light with high efficiency.