Advanced regime of the noncollinear two-phonon acousto-optical interaction governed by elastic waves of finite amplitude and optical spectrum analysis

Calomel-made crystalline acousto-optical cell designed for an advanced regime of noncollinear two-phonon light scattering

“…10 Therefore, it is known that the effective photoelastic constant p eff is given by E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 2 4 ; 6 3 ; 5 2 3 p eff ¼ẽ 1 ðpγÞẽ 0 ¼ 0.5ðp 11 − p 12 Þ ≈ 0.055; (24) where the vectorsẽ 0 andẽ 1 describe the polarization states of incident and scattered light beams, respectively. 10 Therefore, it is known that the effective photoelastic constant p eff is given by E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 2 4 ; 6 3 ; 5 2 3 p eff ¼ẽ 1 ðpγÞẽ 0 ¼ 0.5ðp 11 − p 12 Þ ≈ 0.055; (24) where the vectorsẽ 0 andẽ 1 describe the polarization states of incident and scattered light beams, respectively.…”

“…The calomel-based AOF with the collinear configuration has also been used in the midinfrared range for pulse shaping. 10 These features can be observed under action of the acoustic waves of finite amplitude in crystals with optical birefringence. 9 In the past year, new features of a square-law parametric nonlinearity inherent in the noncollinear two-phonon light scattering had been revealed.…”

“…8 This type of AOFs with collinear AOCs has also been exploited for imaging purposes in biomedical applications, utilizing the slow shear acoustic mode passing along the [110]-axis. The recently identified additional physical degree of freedom 10 unique to the noncollinear two-phonon light scattering can be exploited for designing a specific calomel-based AOC. 10 These features can be observed under action of the acoustic waves of finite amplitude in crystals with optical birefringence.…”

“…10 In particular, significantly nonlinear evolution of the light wave amplitude C 2 ðxÞ, deflected into the second-order has been described (here, x is the spatial coordinate along the direction of light propagation). 10 In particular, significantly nonlinear evolution of the light wave amplitude C 2 ðxÞ, deflected into the second-order has been described (here, x is the spatial coordinate along the direction of light propagation).…”

“…10 can be rewritten in the form below, which now includes acoustic losses E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 2 ; 3 2 6 ; 2 9 1 With α ≠ 0, Eq.…”