What You Need to Know about Optical Transceiver Operating Temperature

optical transceiver

Operating temperature is a crucial parameter that needs consideration when designing, purchasing, and deploying optical fiber transceivers.

In this post, FluxLight shares what you need to know about optical transceiver operating temperature, its effects, and how to choose the suitable temperature transceiver:

Commercial versus Industrial Temperature Ratings

Most optical transceivers are deployed in temperature and humidity-controlled environments. Modules intended for such applications are designed to operate in what is referred to as the “Commercial” temperature range, generally accepted as 0ºC to 70ºC. Some deployments require optical transceivers to operate properly in more harsh environments. “Industrial” temperature rated parts are designed to operate within specifications across a temperature range of -40ºC to 85ºC. Many switch manufacturers do not offer such ‘ruggedized’ optical solutions. Fluxlight, a 3rd party supplier of compatible optical transceivers, offers a wide range of Industrial Temperature optical transceivers.

Operating Temperature Affects on Optical Transceivers

The operating temperature of an optical transceiver can have a significant impact on its performance. Since optical transceivers are solid-state devices, they will physically expand and contract with changes in operating temperature. It is important to deploy optical transceivers that are compatible with the intended environment. While industrial temperature parts may deployed in commercial environments, commercial temperature rated parts may well fail if deployed in industrial applications.

Beyond possible failure of part not designed for industrial application, it should be noted that temperature induced expansion/contraction may change transmit wavelength of light produced by the module. Transceivers designed for use in Wavelength Division Multiplex (WDM) systems often include temperature stabilization to ensure the specified transmitted wavelength is maintained.

How to Choose the Ideal Operating Temperature of an Optical Transceiver

Industrial temperature rated parts are priced at a premium with respect to their Commercial temperature counterparts. Therefore, it is not fiscally sound to deploy Industrial parts where Commercial parts will do.

In general, Industrial temperature parts are recommended in deployments where HVAC infrastructure may be unreliable or non-existent. Such parts should also be considered for environments high in dust, vibration, and high humidity.


It is necessary to understand the importance of maintaining an optical transceiver’s ideal operating temperature. Doing so can ensure that your optical transceiver will function correctly and at its best. Not only will this prolong the life of your optical transceiver, but it will also save you money in the long run. FluxLight is here to answer your questions if you need to know more.

FluxLight is a trusted manufacturer of optical fiber transceivers and other products needed for networking use. Find out more about our products and services!

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