Optical bandwidth values may be specified in terms of frequency or wavelength.ĭue to the inverse relationship of frequency and wavelength, the conversion factor between gigahertz and nanometers depends on the center wavelength or frequency. How to Calculate Bandwidth of antenna Bandwidth of antenna calculator uses Bandwidth of antenna 100 ( (Highest frequency-Lowest frequency)/Centre frequency) to calculate the Bandwidth of antenna, The Bandwidth of antenna formula is defined as the range of frequencies FH -FL over which the antenna can operate correctly. Its full width at half maximum bandwidth is 8.9 nm, corresponding to 3.9 THz. The optical spectrum of an unchirped 80-fs ultrashort light pulse. An optical bandwidth can be the width of a frequency range which can somehow be handled by an optical element or photonic device.įor example, it can be the reflection bandwidth of a mirror, the optical transmission bandwidth of an optical fiber, the gain bandwidth of an optical amplifier, or the phase-matching bandwidth of a nonlinear optical device.Ī common definition of spectral width is the full width at half maximum (FWHM), but other definitions are also used.įor example some authors use the half width at half maximum (HWHM), which is just half the FWHM.On the other hand, ultrashort pulses with few-femtosecond pulse durations can have very large bandwidth – easily tens of terahertz. A light source can have some optical bandwidth (or linewidth), meaning the width of the optical spectrum of the output.įor narrow-linewidth lasers, the bandwidth can be extremely small – in extreme cases below 1 Hz, which is many orders of magnitude less than the mean optical frequency.In the following cases, bandwidth means the width of a range of optical frequencies:
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