US Patent 11373490 Temperature indicator for optical module

In one embodiment, an apparatus includes an optical module comprising a first end for insertion into a network device and a second end extending from the network device when the optical module is inserted into the network device, and a temperature indicator thermally coupled to the optical module and extending from said second end of the optical module. The temperature indicator provides an indication that a surface temperature of the optical module exceeds a predefined safe touch temperature limit.