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Theses

Matrice de lasers à haute cohérence en optique intégrée sur verre

Abstract : To answer demand of an increasing bit-rate in optical telecommunications, the dense wavelength division multiplexing (DWDM) technique allows the simultaneous transport of multiple signals by different carrier frequencies launched into a single optical fiber. The realization of laser sources with a narrow and stable emission spectrum and integrating several wavelengthes is thus required. Two main types of lasers are readily commercially available : semiconductor-based lasers and fiber optics lasers. We propose the alternative solution of glass integrated optics which seems to be a good compromise since it enables both a good stability and the integration of several devices on the same chip. The objective of this work is the realization and the characterization of DFB laser matrices using glass integrated optics technology. The lasers we realized have a 4,3 mW output power for 220 mW injected pump power. The stability of the emitted intensity is characterized thanks to the measurement of the relative intensity noise (RIN), which was found to be less than -155 dB.Hz-1 after 4 MHz. The lasers's emission linewidth is 8 kHz, which corresponds to a coherence length of 10 km. Moreover the realization of a matrix of 18 lasers covering a frequency range of 1 THz is demonstrated. The spacing between adjascent lasers of this matrix is either 25 or 100 GHz, which proves their interest for optical telecommunications. Finally, the remarquably narrow emission linewidth enables us to think of others applications for these devices, ranging from integrated optical sensors to spectroscopy.
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Contributor : Lionel Bastard <>
Submitted on : Thursday, July 21, 2005 - 2:52:38 PM
Last modification on : Wednesday, March 10, 2021 - 9:50:02 AM
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  • HAL Id : tel-00009794, version 1

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Lionel Bastard. Matrice de lasers à haute cohérence en optique intégrée sur verre. Autre. Institut National Polytechnique de Grenoble - INPG, 2003. Français. ⟨tel-00009794⟩

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