Normal EDFA, including single channel, multi channel, Gain Block and EDFA with electric control, size of 90*70*15mm or bigger, can achieve higher gain and higher output power .  There are fixed gain EDFA and variable gain and variable gain slope EDFA.  The gain can be 10~38dB, and the power can reach 20dBm, even more than 27dBm.  Typical noise figure is about 5.5dB. This kind of amplifier, widely used in backbone network, MAN, OTN, PTN , is one of the important functional components of optical communication system.

Mini EDFA features high performance in a small package and low power consumption by using small components and low bending radius optical fiber. Package size is typically half of an MSA EDFA down to 35*12*5.5mm or assembled as thin tray products. Main use cases are single wavelength amplifications with typical output power values around 10dBm. Mini EDFA are mainly used in Metro Networks, Line interfaces and DCO coherent modules.

The pluggable amplifier can be designed in XFP, QSFP, OSFP, CFP2 and other package sizes. The usage is similar to an optical transceiver supporting hot-pluggability with the same interface protocol. Applications can be single- or multi – channel amplification or Variable Gain Amplifier. The output power of single channel amplifier can be around 10dBm. The gain of a multi-channel VGA gain can be adjusted typ. 10dB, and the power can be above 20dBm. This kind of amplifier are mainly used in OTN, PTN and other compact equipment to save space, development and maintenance costs.

Raman amplifier uses the stimulated Raman principle. A post-Raman amplifier can achieve 10~30dB gain by multi-channel amplification.  Gain flatness <=1.5dB, Noise figure <=0dB. Other Raman amplifiers supports 2nd order Raman or forward Raman applications.

To achieve high power amplification these high power multi-mode amplifier are mainly using multi-mode pumps and erbium and ytterbium co-doped fiber. The Output power can reach more than 30dBm and can be split up into multi outputs and integrate xPON channels. They mainly used in PON Access Networks or for dedicated CATV spectral amplification.

Array EDFA integrates 8 to 16 amplifiers in a module by sharing pump signals or been independently pumped, typical 10 - 25dB gain and more than 20dBm output power. They are mainly used in all-optical networks or ROADM systems.

SOAs are used to realize O Band, S Band, C Band amplification, mainly single wavelength or narrow band amplification.  Thypical gain is about 20dB and the output power is around 10dBm. They are mainly used in 5G, spectroscopic amplification, etc.

1U and 2U rack mounted amplifier can support single amplifier modules or be integrated with multiple amplifier modules, further other passive or functional modules can be integrated. Mainly used in subsystems, private networks and other transmission systems.

Passive modules mainly have integrated passives functions like Mux/Demux, optical switching or signal splitting or OTDR functionality. These modules can be used in optical monitoring, optical protection, OXC and other systems.

The spectrum width of the ASE source can cover C Band, L Band, C+L Band by a power stability of +/-0.02dB.  It can be module or bench top type. The ASE source is mainly used in test measurement, sensing and other applications.

The spectrum width of the amplified source can cover C Band, L Band, C+L Band, and the power stability can reach +/-0.02dB. It can be module type, or bench top, mainly used in test measurement, sensing and other fields.