Laser frequency counting and frequency modulation width measurement from a FFT signal

• Autorzy: Křen P.
• Języki publikacji: PL

Abstrakty

EN

A new method of optical frequency beat counting based on fast Fourier transform (FFT) analysis is described. Signals with a worse signal-to-noise ratio can be counted correctly comparing to the conventional counting method of detecting each period separately. The systematic error of FFT counting below 10 Hz is demonstrated and can be decreased. Additionally the modulation width of a frequency-stabilized laser with high frequency modulation index can be simultaneously measured during a carrier frequency measurement against an optical frequency synthesizer or other laser.

Słowa kluczowe

EN

laser; modulation width; frequency measurement; optical frequency synthesizer

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2012
• Tom: Vol. 19, nr 3
• Strony: 565--572
• Opis fizyczny: Bibliogr. 8 poz., rys., wykr., wzory

Twórcy

autor

Křen P.

• Czech Metrology Institute, V Botanice 4, CZ15072 Prague 5, Czech Republic,

Bibliografia

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• [3] Jones, D.J., Diddams, S.A., Ranka, J.K., Stentz, A., Windeler, R.S., Hall, J.L., Cundiff, S.T. (2000). Carrier-envelope phase control of femtosecond mode-locked lasers and direct optical frequency synthesis. Science, 288, 635-639.
• [4] Ye, J., Yoon, T.H., Hall, J.L., Madej, A.A., Bernard, J.E., Siemsen, K.J., Marmet, L., Chartier, J.M., Chartier, A. (2000). Accuracy comparison of absolute optical frequency measurement between harmonic-generation synthesis and a frequency-division femtosecond comb. Phys. Rev. Lett., 85, 3797-3800.
• [5] Stenger, J., Binnewies, T., Wilpers, G., Riehle, F., Telle, H.R., Ranka, J.K., Windeler, R.S., Stentz, A.J. (2001). Phase-coherent frequency measurement of the Ca intercombination line at 657 nm with a Kerr-lens mode-locked femtosecond laser. Phys. Rev. A, 63 021802(R).
• [6] Balling, P., Křen, P. (2008). Absolute frequency measurements of wavelength standards 532 nm, 543 nm, 633 nm and 1540 nm. EPJ D, 48, 3-10.
• [7] Felder, R. (2005). Practical realization of the definition of the metre, including recommended radiations of other optical frequency standards (2003). Metrologia, 42, 323, http://www.bipm.org/en/committees/cc/ccl/mep.html.
• [8] Balling, P. (2001). Measurement of frequency modulation amplitude of lasers to 1 part in 103. Metrologia, 38, 297-299.