What is one drawback of using Fabry-Perot (F-P) lasers in high-speed data (HSD) networks?

The drawback of using Fabry-Perot (F-P) lasers in high-speed data networks primarily lies in the emission of several discrete wavelengths or side modes. F-P lasers, due to their design, can produce multiple wavelengths alongside the main signal. This phenomenon, also known as mode hopping, can lead to issues such as increased chromatic dispersion in fiber-optic systems, which can degrade the quality of the signal, especially at higher speeds.

In high-speed data networks where signal integrity and clarity are critical, the presence of these side modes can cause interference and limit the maximum achievable data rates. This is contrasted with laser types designed specifically for single-wavelength operation, which generally provide a more stable and precise signal, essential for the high-speed data transmission required in modern telecommunication networks.

Other factors such as cost, output power, size, and weight can certainly impact the selection of laser type in networking applications, but the primary concern regarding high-speed data integrity directly relates to the potential for side modes and their associated effects.