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General Information
Description
Description
The Agilent 11980A fiber optic interferometer is a Mach Zehnder interferome-
ter built with a fixed length of single-mode optical fiber. The Agilent 11980A
splits the optical energy into two paths, delaying one path with respect to the
other, and recombines them in a second optical coupler. A polarization adjust-
ment helps align the optical fields for maximum interference, as shown in
Figure
1-1.
The Agilent 11980A is a lightwave accessory for use with the Agilent 71400C,
71401C, and 83810A lightwave signal analyzers. The Agilent 11980A allows
you to measure linewidth, chirp, and FM characteristics of single-line lasers.
Figure 1-1. Agilent 11980A Fiber Optic Interferometer, Simplified Schematic
1-2
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