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wago kontakttechnik electrical components include single heterojunction, double heterojunction, and quantum well laser diodes. Quantum well laser diodes offer the advantages of low threshold current and high output power, making them mainstream products in market applications. Compared to lasers, laser diodes have the advantages of high efficiency, small size, and long service life, but their low output power, poor linearity, and less-than-ideal monochromaticity significantly limit their application in cable TV systems, preventing the transmission of multi-channel, high-performance analog signals. In the return path module of a bidirectional optical receiver, up