Diffractive-optics based fifth-order Raman spectroscopy of ultrafast liquid dynamics

Summary form only given. With a single diffractive optic it is possible to create a beam geometry which significantly phase mismatches the cascaded intermediates while maintaining near-perfect phase matching of the direct, fifth-order signal. Additionally, the diffractive optic provides passive phas...

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Bibliographic Details
Main Authors: Kubarych, K.J., Milne, C.J., Lin, S., Astinov, V., Miller, R.J.D.
Format: Conference Proceeding
Language:English
Subjects:
Geometrical optics
Local oscillators
Optical diffraction
Optical frequency conversion
Optical mixing
Phase detection
Raman scattering
Signal generators
Spectroscopy
Ultrafast optics
Online Access:Request full text
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Description
Summary:Summary form only given. With a single diffractive optic it is possible to create a beam geometry which significantly phase mismatches the cascaded intermediates while maintaining near-perfect phase matching of the direct, fifth-order signal. Additionally, the diffractive optic provides passive phase-locking (/spl sim//spl lambda//50) necessary to implement heterodyne detection by interfering a reference local oscillator with the generated signal field. We present studies of liquid CS/sub 2/ where, in addition to the phase-contrast inherent in a heterodyne measurement, the effects of other variables, such as polarization and pathlength, distinguish the direct fifth-order response from the lower-order cascades.
DOI:10.1109/QELS.2001.961921