486 Diagnostic Techniques
(a)
1500 15001000 1000500 500
200
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50
0
50
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0
3
2
1500 15001000 1000500 500
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(b)
Figure 9.18 Figure of merit, cf. Eq. (9.38), of pulse retrieval based on a spectral measurement
and (a) an amplitude unbalanced third-order correlation and (b) an amplitude and phase unbalanced
third-order correlation.
third-order correlation, and (b) an amplitude and phase unbalanced third-
order correlation using the PICASO scheme, cf. Fig. 9.11. The search space
(φ
2
, φ
3
) is depicted in Figure 9.18, with dark zones representing minima
of the root-mean square deviation, cf. Eq. (9.38). Explain the reason for
the ambiguity in case (a). How do the two possible pulses differ in the
time domain? Why does adding a phase filter resolve the ambiguity?
BIBLIOGRAPHY
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[5] D. E. Spence, P. N. Kean, and W. Sibbett. 60-fs pulse generation from a self-mode-locked
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Opt. Comm., 31:93–94, 1979.
[7] G. H. C. New and J. M. Catherall. Advances in the theory of mode-locking by synchronous
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[8] J. M. Catherall and G. H. C. New. Role of spontaneous emission in the dynamics of mode-locking
by synchronous pumping. IEEE Journal of Quantum Electronics, QE-22:1593, 1986.
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