Keysight Agilent 86140A Optical Spectrum Analyzer-Benchtop Unit Optical Specturm Analyzer

Description of  Keysight Agilent 86140A

• The 86140A Optical Spectrum Analyzer is a benchtop general purpose grating-based analyzer that displays the amplitude of light versus wavelengeh over a 600 to 1700 nm wavelength range. The unit uses a double-pass monochromator design to simultaneously achieve high sensitivity and dynamic range with a fast sweep time.

Feature:

Wavelength  

• Absolute Accuracy (after user cal) refers to the wavelength accuracy after the user has performed the internal wavelength calibration using a source of known wavelength.
•  Reproducibility refers to the amount of wavelength drift which can occur over the specified time while the OSA is swept across a source of known wavelength.
• Tuning Repeatability refers to the wavelength accuracy of returning to a wavelength after having tuned to a different wavelength

Resolution

• FWHM refers to the Full-Width-Half-Maximum resolutions that are available. This indicates the width at half power level of the signal after passing through the resolution slits.
• Amplitude
• Scale Fidelity refers to the potential errors in amplitude readout at amplitudes other than at the calibration point. This specification is sometimes called linearity.
• Flatness defines a floating band which describes the error in signal amplitude over the indicated wavelength range. (This error may be removed at a given wavelength by performing the user amplitude calibration.
• Polarization Dependence refers to the amplitude change that can be seen by varying the polarization of the light entering the OSA. This is not to be confused with amplitude variations caused by the varying distribution of energy between the different modes in fiber that are multimode at the wavelength of interest.

Sensitivity

• Sensitivity is defined as the signal level that is equal to six times the RMS value of the noise. Displayed sensitivity values are nominal. Slightly lower values may have to be entered to achieve specified sensitivity.

​Dynamic Range

• Dynamic Range is a measure of the ability to see low-level signals that are located very close (in wavelength) to a stronger signal. In electrical spectrum analyzers, this characteristic is generally called shape factor.

Sweep Time

• Maximum Sweep Rate refers to the maximum rate that the instrument is able to acquire data and display it. This rate may be limited by multiple internal processes.
• Sweep Cycle Time refers to the time required to make a complete sweep and prepare for the next sweep. It can be measured as the time from the start of one sweep to the start of the next sweep

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