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1986•Electronics LettersRequires access

Simple narrow-linewidth 1.5 μm InGaAsP DFB external-cavity laser

A.R. Chraplyvy, K.-Y. Liou, R.W. Tkach, G. Eisenstein, Y. K. Jhee, Thomas Koch, P.J. Anthony, U. K. Chakrabarti

Open publisher page 20 citations

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.

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What this paper is about

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.

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Available 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.

Key concepts: Laser linewidth, Longitudinal mode, Distributed feedback laser, Optics, Laser, Materials science, Optoelectronics, Semiconductor laser theory

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