Narrow-band optical filter through phase conjugation by nondegenerate four-wave mixing in sodium vapor.
نویسندگان
چکیده
An ultrahigh-Q, tunable optical filter with a FWHM bandwidth of 41 MHz is demonstrated. The filtering is produced by nondegenerate phase conjugation through four-wave mixing in atomic-sodium vapor. The filter is observed to have a maximum quantum efficiency of 4 x 10(-3). However, degenerate phase-conjugation experiments in sodium suggest that a quantum efficiency of greater than unity can be attained on a cw basis.
منابع مشابه
Nondegenerate Four-Wave Mixing in a Homogeneously Broadened Two-Level System with Saturating Pump Waves
The formulation of phase conjugation via nondegenerate four-wave mixing in a homogeneously broadened resonant medium is genetalized to include saturating pump waves. An ultrahigh-Q optical fdter is predicted, showing both gain and a bandwidth less than the homogeneous linewidth of the atom. The dependence of the filter function on the ac Stark effect and on the use of asymmetric pump wave inten...
متن کاملConical emission due to four-wave mixing enhanced by the ac Stark effect in self-trapped filaments of light.
Experimental evidence is presented that shows that the conical emission often found surrounding a near-resonant laser beam after it passes through an atomic vapor is due to nondegenerate four-wave mixing enhanced by the ac Stark effect. We demonstrate self-trapping of a pulsed dye-laser beam in sodium vapor for wavelengths 0.04 to 10 A shorter than that of the D(2) resonance and show that the f...
متن کاملNondegenerate four-wave mixing in a Doppler-broadened resonant medium
Third-order susceptibilities are calculated for a Doppler-broadened two-level system. The dependence of fourwave mixing on the angle 0 between the pump and signal fields is studied, and the reflection coefficient is shown to have a narrow field of view that is inversely proportional to the ratio of the Doppler width to the homogeneous linewidth. For the collinear geometry, 0 = 0°, the frequency...
متن کاملMid-Link Optical Phase Conjugation in Lumped Optical Transmission Systems
We report an analytical description of four wave mixing in lumped optical transmission systems deploying mid-link optical phase conjugator, and provide corroborating simulation results matching theoretical predictions for four wave mixing and for modulated signals. OCIS codes: (190.4380) Nonlinear optics, four-wave mixing; (060.4510) Optical communications.
متن کاملNondegenerate four-wave mixing in graded metallic films
The effective nondegenerate four-wave mixing (NDFM) susceptibility of graded metallic films with weak nonlinearity is exactly derived by invoking the local-field effects. It is found that the presence of gradation in metallic films can yield a broad resonant plasmon band in the optical region, which results in a large enhancement in the NDFM response and thus a large figure of merit. © 2005 Ame...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics letters
دوره 6 8 شماره
صفحات -
تاریخ انتشار 1981