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IM AQ6376-01EN
1.4 Analysis
Spectrum Width Analysis <<See section 6.1 for the operating procedure>>
You can display the spectrum width and center wavelength using the following four types
of calculation.
• THRESH method
• ENVELOPE method
• RMS method
• PEAK RMS method
<See appendix 2, “Spectrum Width Data Calculation Algorithms” for a description of the
spectrum width analysis algorithms and parameters.>
Notch Width Measurement <<See section 6.2 for the operating procedure>>
With notch width measurement, it is possible to measure pass band width / notch
width from the measured waveform of a filter with V-character type or U-character type
wavelength characteristics.
<For a description of the notch width analysis algorithm and parameters, see appendix 2,
“Data Calculation Algorithms for Spectrum Widths.”>
Device Analysis <<See section 6.3 and 6.4 for the operating procedure>>
Light source parameters can be analyzed from the measured waveform of each light
source (DFB-LD, FP-LD, LED).
DFB-LD SMSR Measurement
The side-mode suppression ratio (SMSR) can be measured from the DFB-LD measured
waveform.
FP-LD and LED TOTAL POWER Measurement
Optical power can be measured by integrating the measured waveform level
measurements.
PMD Measurement <<See section 6.6 for the operating procedure>>
It is possible to measure the polarization mode dispersion (PMD) of a DUT (such as
an optical fiber) by using the instrument in combination with an analyzer, polarization
controller, polarizer, and an amplified spontaneous emission (ASE) light source, high-
output LED light source, or other wideband light source.
WDM Analysis <<See section 6.7 for the operating procedure>>
You can analyze WDM transmission signals. You can also measure OSNR of a DWDM
transmission system with 50 GHz spacing. Measurements of WDM signal wavelength,
level, wavelength interval, and OSNR can be made collectively on up to 1024 channels,
and the analysis results can be displayed in a data table.
Optical Amp Analysis <<See section 6.8 for the operating procedure>>
Measurement can be performed of the optical amp gain and noise figure from measured
waveform of the signal light going into the optical amp, as well as the measured
waveform of the output light leaving the optical amp.