Phase conjugation of an optical wave in the case of a degenerate four-wave interaction in an amplifying medium of a chemical HF laser

The approximation of a constant intensity of reference waves is used in the case of low values of the reflection coefficients (less than unity) to investigate numerically the efficiency of optical phase conjugation of a wave from a pulsed chemical HF laser based on a chain reaction. It is shown that the reflection coefficient for the three strongest emission bands P_1–0, P_2–1, and P_3–2 of a pulsed chemical HF laser can be ≳ 0.1.