Abstract
Strong infrared optical signals at the wavelengths 0.991 and 1.149 μm were produced as a result of phase-matched four-photon mixing when Nd:YAG laser light was coupled into a <4-m-long piece of single-mode glass fiber. Stimulated gain was observed, and laser action was obtained with the fiber in an external cavity.
© 1987 Optical Society of America
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