What Is Laser Diode？

Laser Diode includes Single Heterojunction (SH), Double Heterojunction (DH), and Quantum Well (QW) laser diodes. The quantum well laser diode has the advantages of low threshold current and high output power, and is currently the mainstream product in the market. Compared with lasers, Laser Diode has the advantages of high efficiency, small size, and long life, but its output power is small (generally less than 2mW), linearity is poor, monochromaticity is not very good, so that its application in the cable television system Very limited, can not transmit multi-channel, high-performance analog signals. In a backhaul module of a bi-directional optical receiver, a quantum well laser diode is generally used as a light source in the upstream transmission.

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