Abstract

A new technique has been proposed and demonstrated for measuring the pulse-timing fluctuations of mode-locked lasers at low Fourier frequencies. The time interval between the laser pulses is precisely measured by use of zero-dead-time counters referenced to a stable atomic oscillator. By combination of this method with the time-domain demodulation technique, the phase-noise power spectral density of a mode-locked Cr:LiSAF laser has been estimated for the 1-mHz–1-MHz Fourier frequency range, with a 240-dB dynamic range.

© 1999 Optical Society of America

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References

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  1. D. von der Linde, Appl. Phys. B 39, 201 (1986).
    [CrossRef]
  2. H. Tsuchida, Opt. Lett. 23, 456 (1998).
  3. H. Tsuchida, Opt. Lett. 23, 1686 (1998).
    [CrossRef]
  4. P. Kartaschoff, Frequency and Time (Academic, London, 1978), Chap. 2, pp. 13–16.
  5. H. Tsuchida, in Wiley Encyclopedia of Electrical and Electronics Engineering, J. G. Webster, ed. (Wiley, New York, 1999), Vol. 7, pp. 761–767.
  6. H. A. Haus and A. Mezozzi, IEEE J. Quantum Electron. 29, 983 (1993).
    [CrossRef]

1998 (2)

H. Tsuchida, Opt. Lett. 23, 456 (1998).

H. Tsuchida, Opt. Lett. 23, 1686 (1998).
[CrossRef]

1993 (1)

H. A. Haus and A. Mezozzi, IEEE J. Quantum Electron. 29, 983 (1993).
[CrossRef]

1986 (1)

D. von der Linde, Appl. Phys. B 39, 201 (1986).
[CrossRef]

Haus, H. A.

H. A. Haus and A. Mezozzi, IEEE J. Quantum Electron. 29, 983 (1993).
[CrossRef]

Kartaschoff, P.

P. Kartaschoff, Frequency and Time (Academic, London, 1978), Chap. 2, pp. 13–16.

Mezozzi, A.

H. A. Haus and A. Mezozzi, IEEE J. Quantum Electron. 29, 983 (1993).
[CrossRef]

Tsuchida, H.

H. Tsuchida, Opt. Lett. 23, 1686 (1998).
[CrossRef]

H. Tsuchida, Opt. Lett. 23, 456 (1998).

H. Tsuchida, in Wiley Encyclopedia of Electrical and Electronics Engineering, J. G. Webster, ed. (Wiley, New York, 1999), Vol. 7, pp. 761–767.

von der Linde, D.

D. von der Linde, Appl. Phys. B 39, 201 (1986).
[CrossRef]

Appl. Phys. B (1)

D. von der Linde, Appl. Phys. B 39, 201 (1986).
[CrossRef]

IEEE J. Quantum Electron. (1)

H. A. Haus and A. Mezozzi, IEEE J. Quantum Electron. 29, 983 (1993).
[CrossRef]

Opt. Lett. (2)

H. Tsuchida, Opt. Lett. 23, 1686 (1998).
[CrossRef]

H. Tsuchida, Opt. Lett. 23, 456 (1998).

Other (2)

P. Kartaschoff, Frequency and Time (Academic, London, 1978), Chap. 2, pp. 13–16.

H. Tsuchida, in Wiley Encyclopedia of Electrical and Electronics Engineering, J. G. Webster, ed. (Wiley, New York, 1999), Vol. 7, pp. 761–767.

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Figures (4)

Fig. 1
Fig. 1

(a) Block diagram of the experimental setup. (b) Signal and time-base waveforms for time-interval measurements. Filled circles, time stamps.

Fig. 2
Fig. 2

Average period deviation for 40 s, obtained by capture of the time stamps every 106 clock edges.

Fig. 3
Fig. 3

Phase-noise PSD Sϕf for the 1-mHz–1-MHz Fourier frequency range. Curve A, result of the TIA technique; curves B and C, results of the TDD technique for the 2nd and the 80th harmonics, respectively. The frequency span for each measurement is indicated by an arrow.

Fig. 4
Fig. 4

Square root of the Allan variance σyτ for 1-ms–1000-s averaging time.

Equations (1)

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Vt=V01+tsin2πfrt+ϕt,

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