Contents

Optics and Spectroscopy

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Vol. 130, No. 12, 2022

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Spontaneous Four-Photon Mixing in the Formation of Ghost Images

A. V. Belinsky and V. V. Vasilkov p. 585  abstract

Synthesis and Mesomorphic Properties of Biphenyl Derivatives with a Central Unit Based on Oligomeric 1,6-Hexamethylene Diisocyanate

S. A. Gorbachev and V. V. Zuev p. 593  abstract

Analysis of Characteristics of a Waveguide Device for Combining External Optical Beams

V. I. Nalivaiko and M. A. Ponomareva p. 600  abstract

Universal Features of Manifestation of Relationship between Local and Segmental Dynamics of Glassy Polymers at Terahertz Frequencies in IR Spectra

V. A. Ryzhov p. 605  abstract

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