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Operation
Applications
Figure 4-2
illustrates the measurement on a distributed feedback (DFB) laser.
The marker function of the Agilent 71400C lightwave signal analyzer is set to
the –3 dB (or half power) point of the displayed signal. This frequency corre-
sponds to the 3 dB linewidth of the laser. See Agilent Application Note 371
(Agilent part number 5954-9137) for further application details.
Equipment
Lightwave signal analyzer. . . . . . . .Agilent 71400C (shown) or Agilent 83810A
Isolator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Agilent 81210L1
Figure 4-1. Static Linewidth Measurement Test Setup
4-4
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