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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1998),
  • paper QWD7

Ultrafast optically heterodyne detected transient grating spectroscopy using diffractive optics

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Abstract

Optical heterodyne detection (OHD) is a well- established method for achieving both amplification and linearization of optical signals generated from nonlinear experiments by coherently mixing a large reference field with a signal field of interest,1 Since the heterodyne signal is the interference term between the signal and reference fields, it is necessary to keep their relative phase difference, Δϕ, constant. We have implemented OHD in a transient grating (TG) experiment using the experimental setup shown in Fig. 1 to achieve passive stabilization of Δϕ without the need for either active feedback loops or unusual mechanical stability. This stability arises from the geometric symmetry of the TG phase matching condition coupled with the optical arrangement as shown, which eliminates phase noise arising from small fluctuations of the optics.

© 1998 Optical Society of America

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