Optical modules can be classified according to different standards. Common classification methods include:
By data rate. The data rate of an optical module is a key indicator of its transmission speed. Common rate classifications include 400GE, 100GE, 40GE, 25GE, 10GE, GE, FE, etc.
By package type. The package type of an optical module determines its physical shape and size. Common package types include QSFP-DD, QSFP28, QSFP+, SFP28, SFP/eSFP, SFP+, CXP, CFP, etc.
By mode. Based on the fiber type used, optical modules are divided into single-mode and multi-mode. Single-mode modules are typically used for long-distance transmission, while multi-mode modules are suitable for shorter distances and lower-cost transmission.
By center wavelength. The operating wavelength of an optical module is a range, with different wavelengths used to support different optical signal transmissions. Common center wavelengths include 850nm, 1310nm, and 1550nm.
By color. Colored optical modules differ from other types in that they carry multiple light signals with different center wavelengths. They are divided into coarse wavelength division multiplexing (CWDM) and dense wavelength division multiplexing (DWDM) modules.
By function. Optical modules can be classified into single-transmit single-receive modules and transceiver integrated modules, with the latter combining both transmit and receive functions.
By network topology. Optical modules can be divided into point-to-point modules and point-to-multipoint modules (e.g., PON modules), depending on their application scenarios and network structures.
These classification methods reflect the diversity of optical modules in technological development and application scenarios.
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