FOL-OSA: Optical Spectrum Analyser

Parameter Definitions
1) Operating Wavelength Range specifies the spectral region between the minimum and maximum wavelengths over which the OSA device can operate and measure spectrum.
2) Input Power Range specifies the power range of narrow-band signals over which the OSA device can operate and measure spectrum. When measuring DWDM signals, it is the channel input power range.
3) Maximum Input Power is the maximally allowed value of total optical input power to the OSA device.
4) Wavelength Resolution is specified by the Full Width at Half Maximum (FWHM) of the tunable filter. It is also called the 3-dB bandwidth.
5) Absolute Wavelength Accuracy is the maximum wavelength error when measuring laser signals over operating wavelength range. The wavelength error is calculated as the difference of the measured wavelength values between the OSA device and the calibrated wavelength meter.
6) Wavelength Repeatability is the maximum variation of wavelength measurements over operating wavelength range within 24 hours at any fixed measurement condition.
7) Absolute Power Accuracy is the maximum power error when measuring laser signals over operating wavelength range and input power range. The power error is calculated as the difference of the measured powers between OSA device and the calibrated power meter.
8) Relative Power Accuracy is calculated as the maximum difference between the maximum and the minimum power errors over operating wavelength range from any single scans.
9) Power Repeatability is the maximum variation of power measurements over operating wavelength range within 24 hours at any fixed measurement condition.
10) Polarization Dependent Loss (PDL) is the maximum power difference of power measurements between any two polarization states.
11) Optical Rejection Ratio (ORR) is defined as the isolation of the filter at a given location offset away from the center of the filter profile, as schematically shown in image Definition of optical rejection ration  

‍FOL-OSA INTERFACE
Notes:  
i‍) Specifications guarantee for input power range only from −40 ~ 0 dBm and spectral spacing is >= 200 GHz. For the input power between -45 ~ -40 dBm, absolute wavelength accuracy is ± 400 pm and absolute power accuracy is ± 1.0 dB. For the input power between 0 ~ 5 dBm, absolute power accuracy is ± 1.0 dB.  
ii) Typical FWHM is 0.55 nm.      
iii) Do not include PDL.  

MEASUREMENTS
i) All the detected peaks and corresponding powers are displayed in the table
ii) Peak search function is provided which allows to characterise the peaks which are displayed on the screen

APPLICATIONS
i) Can be used for experimentation and analysis fiber optic training setup
ii) Research lab and institutions
iii) Sensing applications
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