Tunnel generation and locking stimulated Raman radiation components

Stimulated Raman radiation is considered in a ring optical resonator. It is supposed that the resonator is partly filled with a condensed medium at the full length of the medium close to several tunnel lengths. A Raman-active medium and an optical waveguide are assumed to occupy a part of the condensed medium. The feasibility is shown of tunnel generation and synchronization of a great number of Stokes components of stimulated Raman radiation. Here, femtosecond light pulses are shown to be formed in a spacing adjacent to the Raman-active medium, the pulses being single over the period
T = 2\pi/\omega_{R}
(ω
R
is the Raman frequency shift). Predicted and considered also are tunnel generation and locking of new light modes in an optical parametric oscillator. The effects are due to a correction for the dispersion of the full effective refractive index of the medium inside the resonator. Numerical calculations of the correction for a glass thin-film optical waveguide, quartz, and the Raman-active media CaCO
3
, C
6
H
6
, CS
2
inside the resonator are represented. Here, five or six Stokes components are shown to be generated and locked for CaCO
3
and C
6
H
6
, eight Stokes components for CS
2
. A similar numerical calculation is represented for the active medium LiNbO
3
in the corresponding optical parameteric oscillator. Here, new modes covering a frequency bandwidth of 5000 cm
^-1
are shown to be feasible. Noted and discussed is also a higher-order correction for the effective refractive index dispersion making it feasible to broaden the frequency bandwidth for tunnel generation and locking.