Anritsu MS9740B - Measurement Using Pulse Method

Chapter 5 Measurement Functions
5-58
5.7.5 Measurement Using Pulse Method
Figure 5.7.5-1 Pulse Method Measurement System
The light source used by pulse method is digitally modulated at a higher
frequency (≤ 500 kHz) than the optical amplifier power control frequency.
Normally, the modulation signal duty ratio is 50%.
Adjust the output level of the signal generator to maximize the extinction
ratio of the light source.
Optical
Amplifier
Optical
Bandpass
Filter
Light
Source
Intensity
Modulated Light
(a) Signal Measurement
MS9740B
Optical Spectrum
Analyzer
Signal
Generator
Modulation
Signal
Light
Source
(b) Measurement of ASE and Optical Output
MS9740B
Optical Spectrum
Analyzer
Signal
Generator
Optical Output
Ext Trigger
Ext Trigger
Optical
Bandpass Filter
Modulation
Signal
Intensity
Modulated Light