The input light may be injected into different ways, depending on the source to be analyzed: Stand-alone and Computer-connected Instruments One can transfer your the measured spectra to a computer in order to store, process and display them there.Īlso, one may automate measurements through a computer which may also control other devices. via a USB, GPIB or network connection, can also be useful. An interface of an OSA to a computer, e.g.There is normally a built-in digital display, where different display modes can be chosen – for example, a linear or logarithmic scale for the power spectral density (see below).There may be the option to save device settings in order to retrieve them with a single button. The operation parameters of an analyzer are set with controls on a front panel.every time when receiving some external trigger signal, or continuously take sweeps, updating the display regularly (e.g. A spectrum analyzer may either take single wavelength sweeps, e.g.The sweep rate can automatically be determined based on the width of the scanned wavelength range, the resolution and possibly an additional sensitivity setting.They often offer a variable wavelength resolution (RBW = resolution bandwidth), e.g.They can cover wide wavelength ranges, possibly using different photodetectors.Other spectrum analyzers are versatile laboratory instruments such equipment can offer many features: Universal spectrum analyzers, offering great flexibility in terms of wavelength ranges, resolution, sensitivity settings etc., are versatile laboratory instruments. Other instruments are made for application mainly with visible light, for example spanning the wavelength range from 400 to 1000 nm.Some of them work far in the infrared spectral region. Some high-resolution spectrum analyzers are made for specific applications in spectroscopy, for example in Raman spectroscopy and fluorescence spectroscopy. the C band, or the full range from 1250 to 1700 nm). There are devices for use in optical communications, which are restricted to one or more telecom wavelength bands (e.g. Some spectrum analyzers are specialized for certain applications: Specialized and All-purpose Spectrum Analyzers telecom erbium-doped fiber amplifiers) in terms of wavelength-dependent gain and noise figure
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