AOC: Active Optical Cable
ASIC: Application‐Specific Integrated Circuit
BER: Bit Error Rate
CDR: Clock & Data Recovery
CEI: Common Electrical Interface
CMIS: Common Management Interface Specification
COBO: Consortium for On-Board Optics
CPO: Co‐Packaged Optics
CTLE: Continuous-Time Linear Equalizer
DAC: Direct Attached Copper
DFB: Distributed Feedback Laser
DPO: DSP Pluggable Optics
DSP: Digital Signal Processing
D2D: Die-to-Die
EIC: Electronic Integrated Circuit
ELS: External Laser Source
EML: Electro-absorption Modulated Laser
FEC: Forward Error Correction
FFE: Feed-Forward Equalization
FPP: Face-Plate Pluggable
FTTS: Fiber-to-the-Server
IB: InfiniBand
ISI: Inter-Symbol Interference
LPO: Linear-drive Pluggable Optics
MLSE: Maximum Likelihood Sequence Estimation
MMF: Multi-Mode Fiber
MPO: Multi-Fiber Push On
MRM: Micro-Ring Modulator
MSA: Multi‐Source Agreement
MZM: Mach-Zehnder Modulator
NIC: Network Interface Card
NRZ: Non-Return-to-Zero
OBO: On-Board Optics
OIF: Optical Internetworking Forum
OSA: Optical Spectrum Analyzer
OSFP: Octal Small Formfactor Pluggable
PAM: Pulse Amplitude Modulation
PIC: Photonic Integrated Circuit
PMD: Physical Medium Dependent
PMF: Polarization-Maintaining Fiber
QSFP: Quad Small Formfactor Pluggable
RPO: Retimed Pluggable Optics
SDN: Software‐Defined Networking
SMF: Single-Mode Fiber
SNR: Signal-Noise Ratio
SOA: Semiconductor Optical Amplifier
TIA: Trans-Impedance Amplifier
TOR: Top‐Of‐Rack Switch/Switching
USR: Ultra Short Reach
VCSEL: Vertical Cavity Surface Emitting Laser
VSR: Very Short Reach
WDM: Wavelength Division Multiplexing
XSR: Extra/Extremely Short Reach
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