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Optical Transceivers Classification And Function

The optical module consists of optoelectronic devices, functional circuits, and optical interfaces. The optoelectronic devices include transmit and receive parts.

Simply put, the function of the optical module is photoelectric conversion, and the transmitting end converts the electrical signal into an optical signal. After being transmitted through the optical fiber, the receiving end converts the optical signal into an electrical signal.

Structure editing

The transmitting part is: inputting a certain bit rate of the electric signal to drive the semiconductor laser (LD) or the light emitting diode (LED) to emit a corresponding rate of modulated optical signal after being processed by an internal driver chip, and an internal optical power automatic control circuit is provided therein. The output optical signal power remains stable. The receiving part is: After a certain code rate of the optical signal input module is converted into an electrical signal by the optical detection diode, the electrical signal corresponding to the rate is output after the preamplifier.


By function

Including optical receiver module, optical transmitter module, optical transceiver module and optical forwarding module.

The main function of the optical transceiver integrated module is to realize the optoelectronic/electro-optical conversion, including optical power control, modulation and transmission, signal detection, IV conversion, and amplitude limiting amplification decision regeneration functions. In addition, there are anti-counterfeit information query, TX-disable and other functions, common There are: SFP, SFF, SFP+, GBIC, XFP, 1x9, etc.

The optical forwarding module not only has a photoelectric conversion function, but also integrates a lot of signal processing functions, such as: MUX/DEMUX, CDR, function control, performance acquisition and monitoring. The common optical forwarding modules are: 200/300pin, XENPAK, and X2/XPAK.

The optical transceiver module, the English name transmitter, short optical module or fiber module, is an important device in optical fiber communication systems.

By parameter

Pluggability: hot-swappable and non-hot-swappable

Package Type: SFP, GBIC, XFP, Xenpak, X2, 1X9, SFF, 200/3000pin, XPAK

Transmission rate: Transmission rate refers to the number of bits transmitted per second in Mb/s or Gb/s. Optical module products cover the following major speeds: low speed, 100Mbps, Gigabit, 2.5G, 4.25G, 4.9G, 6G, 8G, 10G and 40G.

By packaging

1. XFP (10 Gigabit Small Form Factor Pluggable) is a hot-swappable, optical transceiver independent of the communication protocol for Ethernet 10G bps, SONET/SDH, Fibre Channel.

2. Small-size pluggable light emitting module (SFP) is currently the most widely used.

3.GigacBiDi series single-fiber bidirectional optical modules use WDM technology to realize a fiber transmission bidirectional information number (point-to-point transmission, especially fiber optic resources are insufficient, requiring one fiber to transmit bidirectional signals). GigacBiDi includes SFP single-fiber bidirectional (BiDi), GBIC single-fiber bidirectional (BiDi), SFP+ single-fiber bidirectional (BiDi), XFP single-fiber bidirectional (BiDi), SFF single-fiber bidirectional (BiDi), and others.

4. RJ45 electrical plug small pluggable module, also known as electrical module or electrical module.

5.SFF is divided into 2x5, 2x10, etc. according to its pin

6. Gigabit Ethernet Interface Converter (GBIC) Module

7. Passive optical network PON (A-PON, G-PON, GE-PON) optical modules

8.40Gbs high speed optical module.

9. SDH transmission module (OC3, OC12, OC48)

10. Storage modules, such as 4G, 8G, etc. [1]

Application editing

D/T's full name in English is: datacom/telcom. Data communication mainly includes computer video, data communication and so on. Telcom mainly includes wireless voice communications.

This type of product is mostly used in backbone networks in fiber optic networks.

PON: English: passive optical network: passive optical network. Such products are mainly used in access networks of optical fiber network systems. One of the triplex products can transmit optical signals as well as analog signals.

The optical modules are mainly classified into: GBIC, SFP, SFP+, XFP, SFF, and CFP. Optical interface types include SC and LC. However, SFP, SFP+, and XFP are currently used instead of GBIC. The reason is that GBIC is bulky and easily broken. The "" commonly used SFPs are small and cheap.

Type: Single-mode optical module is suitable for long-distance transmission; multi-mode optical module is suitable for short-distance transmission.

Role: The optical module is used to transfer the carrier between the switch and the device. It is more efficient and safe than the transceiver.


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