Wavelength range refers to the span of wavelengths over which a certain process, measurement, or operation is defined or applicable. In the context of optics and communications, it usually indicates the range of wavelengths for which a device or system is designed to operate.
For instance, when discussing fiber-optic communication systems, the wavelengths commonly used are generally in the infrared range and can be divided into several bands:
- O-band (Original): 1260 nm to 1360 nm
- E-band (Extended): 1360 nm to 1460 nm
- S-band (Short): 1460 nm to 1530 nm
- C-band (Conventional): 1530 nm to 1565 nm
- L-band (Long): 1565 nm to 1625 nm
- U-band (Ultra-long): 1625 nm to 1675 nm
Each of these bands has its own advantages and characteristics, which make them suited for certain applications.
It’s worth noting that in other fields or contexts, “wavelength range” can have different specific values. For instance, the visible light spectrum ranges from approximately 400 nm (violet) to 700 nm (red). The ultraviolet range is below 400 nm, while the infrared range is above 700 nm.
Understanding the wavelength range is critical when designing or selecting equipment, as devices like photodetectors, light sources, or filters are often optimized for specific wavelength ranges.