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. 2010 Aug 23;1(2):676–686. doi: 10.1364/BOE.1.000676

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©2010 Optical Society of America

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License, which permits download and redistribution, provided that the original work is properly cited. This license restricts the article from being modified or used commercially.

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Fig. 2 — Simulation of P(r₀,ω) with n = 1, Eq. (7). Panel A shows the resulting frequency band due to single photon photoacoustic emission (PA) at the laser repetition rate of 10 kHz (ω_l). Panel B includes the amplitude modulation of the pump (Pu) and probe (Pr) fluence, which adds beat frequencies of the pump and probe at 1 kHz ( ± ω_pu) and 0.7 kHz ( ± ω_pr), respectively to the 10 kHz band. All bands are due to single photon photoacoustic emission. Panel C includes the pump-probe interaction (coefficient D, Eq. (7), which induces sidebands at the sum (PP_s), 1.7 kHz ( ± (ω_pu + ω_pr)) and difference (PP_d), 0.3 kHz ( ± (ω_pu- ω_pr)) of the pump and probe modulation.