Simple narrow-linewidth 1.5 ?m InGaAsP DFB external-cavity laser |
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| Authors: | Chraplyvy A.R. Liou K.Y. Tkach R.W. Eisenstein G. Jhee Y.K. Koch T.L. Anthony P.J. Chakrabarti U.K. |
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| Affiliation: | AT&T Bell Laboratories, Crawford Hill Laboratory, Holmdel, USA; |
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| Abstract: | An external-cavity laser consisting of a 1.5 ?m-wavelength antireflection-coated DFB laser chip, a microscope objective and a mirror provides a stable, single-frequency, narrow-linewidth (?f=40 kHz) output. Because the laser operates in the strong feedback regime, it is immune to external optical perturbations. Single-longitudinal-mode operation is maintained by the DFB grating, and the linewidth is reduced by the extended passive cavity. |
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