As a new, simpler path to 100G and 400G short reach applications, Pulse Amplitude Modulation (PAM) is emerging as a popular choice. The ability to sort out the signal in the electrical domain, rather than the optical domain, is driving this cost effective approach. PAM is being evaluated over both, single mode and multimode fiber from 850 nm through 1550 nm. For short haul transmission, providing multiple levels of modulation on a single wavelength increases high spectral efficiency, which is beneficial for low power, high density interconnect applications.
Discovery offers a linear, optical receiver as a laboratory reference for engineering developments in regards to PAM. Discovery’s receiver offers user flexibility by being available with either single-ended or differential output. In addition, the DSC-R409 offers a linear analog response over its whole frequency range. Discovery’s optical receiver is available in a high responsivity version optimized at 850 nm and 1310 nm/1550 nm for both single mode and multimode fiber applications.