sallyfiber

Divided by rate:
Ethernet applications 100Base, 1000Base (Gigabit), 10GE
SDH applications, 155M, 622M, 2.5G, 10G
According to package sub: 1 × 9, SFF, SFP, GBIC, XENPAK, XFP
1 × 9 package - welding optical module, the general rate is not higher than gigabit, multi-use SC connectors
SFF package - welding small package optical modules, generally no higher than gigabit speeds,use of LC interface
GBIC package - hot-swappable Gigabit Interface optical module, with SC Interface
SFP package - hot little package module, the highest data rate of up to 4G, LC interfaceto use more

XENPAK package - used in Gigabit Ethernet, using SC connectors

XFP package - 10G optical modules used in Gigabit Ethernet, SONET and others ystems, with LC interface

According to the type of laser : LED, VCSEL, FP LD, DFB LD
Divided by the emission wavelength: 850nm, 1310nm, 1550nm, etc.
Divided according to use: Non-Hot Plug (1 × 9, SFF), hot-pluggable (GBIC, SFP, XENPAK, XFP)