Title:
Measurement of complex Χ(3) using degenerate four-wave mixing with an imaged 2-D phase grating
Measurement of complex Χ(3) using degenerate four-wave mixing with an imaged 2-D phase grating
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Author(s)
Tseng, Shuo-Yen
Cao, Weilou
Peng, Yi-Hsing
Hales, Joel M.
Chi, San-Hui
Perry, Joseph W.
Marder, Seth R.
Lee, Chi H.
Herman, Warren N.
Goldhar, Julius
Cao, Weilou
Peng, Yi-Hsing
Hales, Joel M.
Chi, San-Hui
Perry, Joseph W.
Marder, Seth R.
Lee, Chi H.
Herman, Warren N.
Goldhar, Julius
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Abstract
We present a simple optical arrangement for phase sensitive detection of degenerate four-wave mixing (DFWM) to characterize the real and imaginary parts of c(3) using an imaged 2-D phase grating. Phase sensitive coherent detection of DFWM signal is demonstrated. Phase stabilization of the interferometric arms is obtained passively with the 2-D grating. A processable polyacetylene sample is characterized at a wavelength of 1.5 µm using this technique. The observed nonlinearity is determined to be a fast (<250 fs) effect using a simple test.
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2006-09
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