Phase mismatch

Inwa (x/c)2(lw)nsin2(irz/2/c), where lQ is the coherence length (distance for accrual of a it phase mismatch). 

Figure 4.16 The observed cos2 (//) signal from a Mach-Zehnder modulator. A phase mismatch of 7r gives one full modulation amplitude. The pattern is completely periodic for higher values of the phase mismatch...

Figure 11. Experimental diagram demonstrating CARS signal generation in gases using an intentional phase mismatch condition to minimize sample volume and spurious signal generation in optics.

Fig. 7. The evolution of the harmonic power with propagation distance (arbitrary units) for ADM,WBM and MD phase-matching (solid line). The Cerenkov power changes from quadratic (solid line) to linear long (dashed line) growth. For QPM for alternate sections with no X1-2 1 (short dashed line). The phase-mismatched case is also shown (dotted line)...

The simulations generally fit the experimental curves satisfactorily and uniquely within the indicated variation of parameters. Sometimes at longer delay times the fit is worse due to phase mismatch so the earlier delay time data is more heavily weighted. The analysis procedures and examples of the quality of fits obtainable have been thoroughly described (9.10). 

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