Nondegenerate four wave mixing in integrated optics (A)

J. M. Wiesenfeld, Ralf Ludwig

Xin Mi, Zuhe Yu, Qian Jiang +3 more

Based on the polarization interference between two four-wave mixing (FWM) processes, we demonstrate a phase-sensitive method for studying Raman-enhanced nondegenerate four-wave mixing (RENFWM). The reference beam is another FWM signal, which propagates along the same optical path as the RENFWM signal. We have employed this method to study the phase dispersion of the third-order susceptibility χ(3) and for optical heterodyne detection of the RENFWM signal.

Jiang Qian, Xin Mi, Zuhe Yu +3 more

We demonstrated a phase-sensitive method for studying the Raman-enhanced nondegenerate four-wave mixing (RENFWM). The reference beam is another four-wave mixing signal, which propagates along the same optical path as the RENFWM signal. This method is used for studying the phase dispersion of the third-order susceptibility χ (3) and for the optical heterodyne detection of the RENFWM signal. PACS: 42. 65. Hw

Takayoshi Kobayashi, Kazuhiko Misawa, Toshiaki Hattori

Jiang Sun, Hongxin Su, Yan-bang Wang +3 more

The autoionization state of barium was observed by optics heterodyne between three-photon resonant nondegenerated six-wave mixing (NSWM) and two-photon resonant nondegenerated four-wave mixing (NFWM). In this way, optics heterodyne spectrum of 6p(3/2) 19d autoionization state of barium was measured. The suppression and enhancement of the NFWM signal was observed which was caused by the quantum interference between NFWM and NSWM. Our method is a pure nonlinear optic technique. It has the advantages of excellent spatial signal resolution and simple optical alignment. Here two-photon resonant NFWM is used as local oscillation, while three-photon resonant NSWM signal is used as signal beam. Detection of autoionization states of Ba was achieved by changing the frequency of signal beam. The phase matching condition of this technique is not so stringent and can be achieved over a very wide frequency range, which is very difficult in the general six-wave mixing. Furthermore, the signal is coherent light. Optics heterodyne spectrum is a Doppler-free spectroscopy when the incident lasers have narrow bandwidths.

N.D. Taket, L. M. Connors, Michael A. Fiddy +1 more