- #1
stevenjones3.1
- 25
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Hello All
I am using a very basic delay line interferometer to measure the linewidth of a laser source. Basically there is a 1550nm laser that emits light which is split, and one half of the light travels down a 700m delay line before being recombined and the interference is observed.
This is a self-homodyne system, and the output is measured with a spectrum analyzer to determine the line width of the laser.
There should be a lower limit to the frequency which can be observed with a delay line interferometer which can be calculated or approximated theoretically but I am having trouble figuring out how.
any help would be greatly appreciated.
I am using a very basic delay line interferometer to measure the linewidth of a laser source. Basically there is a 1550nm laser that emits light which is split, and one half of the light travels down a 700m delay line before being recombined and the interference is observed.
This is a self-homodyne system, and the output is measured with a spectrum analyzer to determine the line width of the laser.
There should be a lower limit to the frequency which can be observed with a delay line interferometer which can be calculated or approximated theoretically but I am having trouble figuring out how.
any help would be greatly appreciated.