Abstract
The generation of a multifrequency continuous-wave laser through stimulated Raman scattering and phase-matched four-wave mixing in a medium-filled optical cavity is demonstrated. Three different quantum pathways for the four-wave mixing, two of them degenerate and one of them nondegenerate, can be excited independently by tuning the intracavity dispersion. The results suggest that phase-matched Raman sidebands were generated on the longer wavelength side as well as on the shorter wavelength side, which can be used for the Fourier synthesis of a train of ultrashort optical pulses.
Highlights
Nonlinear optical interactions rely on the phase-relationship between multiple laser fields coupled to each other through the strongly-driven nonlinear polarization of optical materials
The generation of deepultraviolet ultrashort pulses [3] and high-order harmonics [4] was successfully demonstrated in filled hollow optical waveguides, and a phase-matched nonlinear optical interaction pumped by a low-power continuous wave was demonstrated in a dispersion-compensated high-finesse optical cavity [5]
We demonstrated the generation of four lines of a single transverse/longitudinal emission via intracavity SRS and phase-matched four-wave mixing (FWM) based on a cw laser
Summary
Nonlinear optical interactions rely on the phase-relationship between multiple laser fields coupled to each other through the strongly-driven nonlinear polarization of optical materials. Perfect phase-matching is generally prevented by the chromatic dispersion of nonlinear optical materials that disturbs the phase-relationship during the propagation of the laser fields. To solve this problem, sophisticated techniques based on the use of birefringent crystalline materials [1] and periodicallypoled structures [2] are widely used for efficient frequency conversions. For the use of isotropic nonlinear optical materials, such as gases, the anomalous dispersion of optical waveguides [3, 4] and negative-dispersive optical cavities [5] can be utilized to improve the efficiency of the frequency conversion. The generation of deepultraviolet ultrashort pulses [3] and high-order harmonics [4] was successfully demonstrated in filled hollow optical waveguides, and a phase-matched nonlinear optical interaction pumped by a low-power continuous wave (cw) was demonstrated in a dispersion-compensated high-finesse optical cavity [5]
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