Simple narrow-linewidth 1.5 μm InGaAsP DFB external-cavity laser
- 16 January 1986
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 22 (2) , 88-90
- https://doi.org/10.1049/el:19860060
Abstract
An external-cavity laser consisting of a 1.5 μm-wavelength antireflection-coated DFB laser chip, a microscope objective and a mirror provides a stable, single-frequency, narrow-linewidth (Δf=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.Keywords
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