1310 nanometers. The 1310 optical module usually refers to the 1310 nanometer laser transmitter module for optical fiber communication. The operating wavelength is 1310 nanometers, through which optical signals are transmitted and received. The chip inside the module is usually made of semiconductor material, and the size of the chip can vary depending on the manufacturer and the specific product model, usually on the nanometer scale.
Most of the chips used in routers are 14 nanometers, and there are also 12 nanometers.