Which one of the following is the range of frequency used in optical communication?

Optical communication utilizes the electromagnetic spectrum in the infrared and visible light regions. In fiber-optic systems, the standard wavelengths used are centered around 0.8 μm, 1.3 μm, and 1.55 μm [t1]. For instance, a wavelength of 1.55 μm (1550 nm) corresponds to a frequency of approximately 193 THz (1.93 × 10^14 Hz) [t1]. Generally, the optical communication band spans the near-infrared spectrum, where frequencies range from approximately 10^13 Hz to 10^14 Hz. This high frequency allows for significantly greater bandwidth compared to traditional radio or microwave frequencies [t2]. While the broader optical spectrum (including ultraviolet) can reach up to 10^17 Hz, the practical range for telecommunications and fiber-optic transmission is specifically concentrated in the 10^13–10^14 Hz range to minimize signal attenuation and dispersion [t1][t3].

Sources

1. [1] https://www.sciencedirect.com/topics/computer-science/wavelength-range
2. [2] https://tf.nist.gov/general/pdf/3069.pdf