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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 27, Iss. 11 — Nov. 1, 2010
  • pp: 2514–2523

Phase filtering in nonlinear-imaging technique with a phase object

Min Shui, Xinyu Luo, Xueru Zhang, Xiao Jin, Changwei Li, Junyi Yang, Zhongguo Li, Guang Shi, Kun Yang, Yuxiao Wang, and Yinglin Song  »View Author Affiliations


JOSA A, Vol. 27, Issue 11, pp. 2514-2523 (2010)
http://dx.doi.org/10.1364/JOSAA.27.002514


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Abstract

Using the nonlinear-imaging technique with a phase object (NIT-PO), we have studied third-order nonlinearities of various samples. In this work, we develop, for pure nonlinear refractive materials, an approximate method to calculate the nonlinear refractive coefficient analytically. By decomposing the object field passing through the phase object into two top-hat beams of different phases and beam radius, we acquire the approximate phase contrast, from which we extract the nonlinear refractive coefficient. This approximation is valid when the on-axis nonlinear phase shift by the sample is less than π. In addition, this approximation serves to estimate the sensitivity and monotonic interval for nonlinearity measurements more easily and thus helps us to maximize both the sensitivity and monotonic interval of measurements. We test this method with CS 2 , a well-characterized third-order nonlinear refractive material using 21  ps laser pulses at 532 nm . We expect this method can be applied to high-order nonlinear refraction cases.

© 2010 Optical Society of America

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(190.4400) Nonlinear optics : Nonlinear optics, materials

ToC Category:
Nonlinear Optics

History
Original Manuscript: May 7, 2010
Revised Manuscript: September 25, 2010
Manuscript Accepted: September 28, 2010
Published: October 29, 2010

Citation
Min Shui, Xinyu Luo, Xueru Zhang, Xiao Jin, Changwei Li, Junyi Yang, Zhongguo Li, Guang Shi, Kun Yang, Yuxiao Wang, and Yinglin Song, "Phase filtering in nonlinear-imaging technique with a phase object," J. Opt. Soc. Am. A 27, 2514-2523 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-11-2514

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