A Scanning Spherical Mirror Interferometer for the Analysis of CO(2) Laser Radiation.
A theoretical and experimental investigation was performed on a scanning spherical mirror interferometer designed for the spectral analysis of CO(2) laser radiation. It is shown that this instrument can be applied to study laser modes and also to measure with high precision the wavenumber difference of two lines spaced several reciprocal centimeters apart. As calculated and observed, the error in determining wavenumber differences for the instrument used is below about +/-0.05 cm(-1) and it is shown that a much more accurate instrument can be constructed. An attempt to use a mode-degenerate (confocal) resonator with central coupling holes was unsuccessful.
Schiffner
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