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DFB fiber lasers as optical wavelength standards in the 1.5-μm region

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3 Author(s)
H. Simonsen ; Danish Inst. of Fundamental Metrol., Lyngby, Denmark ; J. Henningsen ; S. Sogaard

A single-mode distributed feedback (DFB) fiber laser has been frequency locked to a CO2 absorption line at 1578.665 nm to demonstrate its potential as a wavelength standard. A frequency stability of 10-8 (≈2 MHz) was achieved on a time scale of minutes. A mechanical lead screw provided coarse wavelength tuning, white wavelength modulation and fast frequency corrections were applied by straining the fiber laser with piezoelectric transducers. With a suitable choice of absorption line, such a system may serve as an absolute frequency reference for dense wavelength-division multiplexing grids in telecommunication

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:50 ,  Issue: 2 )