Abstract

With a low-power cw photolytic atomic iodine laser operating at 1.315 μm, coherence lengths greater than 220 m have been observed. These results are to our knowledge the first coherent length measurements of any type of atomic iodine laser. A Michelson interferometer was used to demonstrate this long-coherence-length property. In addition, Fabry–Perot interferometric measurements provided a laser frequency linewidth (Δf < 1.0 MHz) consistent with this long-coherence-length observation. Such a large coherence length should be common to all homogeneously broadened, photolytic atomic iodine lasers.

© 1991 Optical Society of America

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