Phase conjugation

About: Phase conjugation is a research topic. Over the lifetime, 3694 publications have been published within this topic receiving 49099 citations.

A model for diffraction-limited high-power multimode fiber amplifiers using seeded stimulated Brillouin scattering phase conjugation

Abstract: Diffraction-limited polarized stimulated Brillouin scattering (SBS) Stokes output from a multimode fiber is possible when the Stokes beam is the phase conjugate of diffraction-limited polarized pump light from a narrow-band master oscillator Net amplification can be obtained by interposing a gain medium, such as a fiber amplifier between the master oscillator and the region of SBS generation This paper proposes and studies numerically a model which describes the space-time dynamics of SBS generation, including phase conjugation, attenuation, phonon decay, thermal noise, inhomogeneous broadening, and amplifier gain Noise reduction and phase locking are obtained by seeding the low-power end of the fiber at the Stokes frequency Simulations are described for the case of 1064 /spl mu/m light amplification in a dual-clad Yb-doped multimode fiber amplifier

Transient regime of Kerr-frequency-comb formation

Abstract: Temporal growth of an optical Kerr frequency comb generated in a nonlinear microresonator is studied experimentally. We show that the comb emerges on time scales significantly exceeding the ring-down time of the resonator modes and measure the time delay. Experimental data are explained via numerical simulations.

Time reversal of Berry's phase by optical phase conjugation

Abstract: We examine experimentally the time-reversal properties of Berry’s geometrical phase in one of its optical manifestations, Pancharatnam’s phase, through the use of optical phase conjugation. The time-reversal symmetry of the total optical system is broken by a nonreciprocal element, a Faraday rotator. Nevertheless, we find that the geometrical part of the phase acquired by an optical wave in passing through the system still respects time-reversal invariance.

Failure of phase-matching concept in large-signal parametric frequency conversion

Abstract: Four-wave mixing experiments in a low-birefringence optical fiber reveal an unexpected sudden increase of the conversion efficiency as the signal power crosses a threshold value In this regime, peak frequency conversion is achieved outside the small-signal parametric gain spectrum A nonlinear model of wave mixing fits the measured data well

Method and apparatus for non-frequency-shifted, phase conjugation of optical waves by brillouin-enhanced four-wave mixing

Abstract: Method and apparatus for optical phase conjugation, which apparatus is also known as a phase conjugate mirror, utilizes Brillouin enhanced four wave mixing in which a forward going pump wave and a backward going pump wave have frequencis which differ by twice the Brillouin frequency of the medium. The probe wave and the conjugate wave, which is obtained by Brillouin enhanced four wave mixing in the medium, have the same frequency, which differs from the pump wave frequencies by the Brillouin frequency of the four wave mixing medium. High reflectivity (gain) is obtained as a result of Brillouin resonance enhancement. The backward going pump wave is created from the forward going pump wave which is transmitted through the four wave mixing medium by stimulated Brillouin scattering in a Brillouin scattering medium having a Brillouin frequency twice that of the four wave mixing medium. The two pump waves are therefore phase conjugates of each other and the quality of the phase conjugation process is not degraded even by the use of an aberrated pump wave.