KEYSIGHT N7781C CALIBRATION and KEYSIGHT N7781C REPAIR
 
A calibration by Custom-Cal is performed by engineers with extensive OEM experience. We have the expertise and the necessary standards to perform the KEYSIGHT N7781C Calibration, onsite calibration may be available. We specialize in quick turnaround times and we can handle expedited deliveries upon request.

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   KEYSIGHT N7781C   Description / Specification:    
KEYSIGHT N7781C 1240 to 1650 nm Polarization Analyzer

The Keysight N7781C Polarization Analyzer is a compact high-speed polarization analyzer that provides comprehensive capabilities for analyzing polarization properties of optical signals. This includes representation of the state of polarization (SOP) on the Poincaré sphere (Stokes parameter). The on-board algorithms together with the on-board calibration data ensure highly accurate operation across a broad wavelength range. Its real time measurement capability of 1 M samples/s, the instrument is well suited for analyzing disturbed and fluctuating signals as well as for control applications requiring real time feedback of polarization information. It comes in a compact form factor of just one rack height unit, with LAN and USB interfaces.
Specifications.

Operating wavelength range: 1240 nm to 1650 nm.
Specification wavelength ranges: 1270 - 1620 nm.
SOP measurement uncertainty: Typical 1.5°.
DOP measurement uncertainty: ± 2.0%, typical ± 1.5%.
Relative power measurement uncertainty due to PDL: ± 0.05 dB, typical ± 0.04 dB.
Relative power measurement error due to other factors: Typical ± 0.1 dB.
Input power range: -50 dBm to +7 dBm.
Maximum safe input power: +12 dBm.



 



Related Optical Terms and Definitions. For a complete list go to our  Terms and Definitions Page.

Chirp
A change in the optical frequency caused by direct modulation of the laser. A chirp is a signal in which the frequency increases ('up-chirp') or decreases ('down-chirp') with time. In some sources, the term chirp is used interchangeably with sweep signal.

Isolation
The extent to which optical power from one signal path is prevented from reaching another signal path.

Polarization Extinction Ratio
Polarization Extinction Ratio is the ratio of optical power in the slow axis of the polarization maintaining fiber to optical power in the fast axis within a specified wavelength range.

Sidemode Suppression Ratio
Sidemode Suppression Ratio is the ratio of average signal power to the optical power of the highest sidemode within a distance from 0.1 to 6 GHz to the signal’s optical frequency, expressed in dB.

Wavelength Stability
Wavelength Stability is the change of wavelength during given time span, expressed as ± half the span between the maximum and the minimum of all actual wavelengths.

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