Accelink pluggable amplifiers are a series of EDFAs that support hot plug and are compatible with various pluggable small form factor standards, such as XFP/CFP/CFP2/QSFP28/QSFP-DD/OSFP. The product has compact size, excellent optical parameter and built-in control circuit, which can be directly installed on port of switch or router and conveniently deployed in optical transport system. According to different form factor requirements, it will supports C-band full-functional EDFA, narrow-band applification or single-wavelength amplification, and supports customer-defined pluggable design requirements.