Central operating wavelength is a term used to describe the nominal value of the wavelength of light that is generated by a cable. It is the wavelength at which the majority of the optical power generated by the cable is concentrated, and is determined by measuring the peak power of the cable’s mode. In fiber optic cables, the central operating wavelength is typically within the infrared range, and can vary depending on the type of fiber used.
The central operating wavelength is often used to determine the maximum transmission capacity of the cable, as well as its optical loss characteristics. For instance, the loss of a fiber optic cable is usually much higher at longer wavelengths than at shorter wavelengths, so the central operating wavelength of the cable can provide a general indication of its potential performance. Additionally, the central operating wavelength of the cables can help to determine compatibility between cables when connecting two systems or networks together.
In LED cables, the central operating wavelength is determined by measuring the power spectrum at the two half amplitude points. This allows for a more precise indication of the wavelength of light that is generated by the cable.
Overall, the central operating wavelength of a cable is an important factor to consider when choosing a cable for a particular application. Knowing the central operating wavelength will allow engineers to better determine the compatibility of the cable with other systems or networks, as well as its potential transmission capacity and optical loss characteristics.