Special Issue on Raman Spectroscopy and its Applications

Journal of Chemical Sciences

, Volume 102, Issue 5, pp 565-574

Raman induced phase conjugation spectroscopy

  • B. Raghavendra PrasadAffiliated withDepartment of Physics, Indian Institute of Science
  • , R. Krishna MohanAffiliated withDepartment of Physics, Indian Institute of Science
  • , C. K. SubramanianAffiliated withDepartment of Physics, Indian Institute of Science
  • , P. S. NarayananAffiliated withDepartment of Physics, Indian Institute of Science

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

Raman induced phase conjugation (RIPC) spectroscopy is a relatively new coherent Raman spectroscopic (CRS) technique using optical phase conjugation (OPC), with which complete Raman spectra of transparent media can be obtained. It is a non-degenerate four-wave mixing technique in which two pulsed laser beams at Ω1 and Ω1 ± Δ where A corresponds to a vibrational frequency of a nonlinear medium mix with a third laser beam at Ω1 to generate a fourth beam Ω1 ± Δ, which is nearly phase conjugate to one of the beams at Ω1. With this technique one can measure the ratio of the resonant and nonresonant components of the third-order nonlinear susceptibilities of the nonlinear media. We have used this technique to get Raman spectra of well-known organic solvents like benzene etc., using pulsed Nd: YAG -dye laser systems. We have also studied the effect of delaying one of the interacting beams with respect to the others and the phase conjugate property of RIPC signals.

Keywords

Raman induced phase conjugation spectroscopy coherent Raman spectroscopy phase conjugate property