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Proceedings Paper

Frequency stabilized near-IR laser system for optical communications
Author(s): B. Růžička; O. Číp; J. Lazar
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Paper Abstract

We present a design of a stabilized laser system, an etalon of the optical frequency at the 1.5 μm band following the demands of the telecommunication industry in the Czech Republic. Our laser system employs a DFB laser diode in a two stage stabilizing scheme. The linear absorption arrangement with an acetylene filled absorption cell of a pressure about 1 kPa is used to lock the laser to the Doppler-broadened lines. To achieve a reliable and robust stabilization of the laser frequency we arranged a two-loop digital servo-system overcoming the problem of a narrow locking range of the detected transition. The wavelength of the laser is modulated by current and the servo-control and tuning is performed by a fast and precise thermal control. To achieve the resolution of the weak sub-Doppler transitions we assembled a locking scheme via frequency-modulation spectroscopy to the high finesse cavity. The system is assembled using predominantly fibre-optic components. A technology of acetylene absorption cells with AR coated windows is presented as well.

Paper Details

Date Published: 6 December 2006
PDF: 7 pages
Proc. SPIE 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 594518 (6 December 2006); doi: 10.1117/12.638956
Show Author Affiliations
B. Růžička, Institute of Scientific Instruments (Czech Republic)
O. Číp, Institute of Scientific Instruments (Czech Republic)
J. Lazar, Institute of Scientific Instruments (Czech Republic)


Published in SPIE Proceedings Vol. 5945:
14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Anton Štrba; Dagmar Senderákova; Miroslav Hrabovský, Editor(s)

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