4
1 Resonance Methods for Increasing Sensitivity of Interferometry …
Rhodamine 6G with the wavelength-tuned radiation of 570–620 nm (that coincides
with resonance sodium of natrium NaI—589 nm and 589.6 nm) was chosen.
In Fig. 1.1, the optical scheme of the laser facility can be seen. The optical pumping
of the cell with the Rhodamine 6G alcoholic solution was made by the second ruby
laser harmonic, working in Q-switched mode. Ruby laser resonator is formed by
100% dielectric mirror (1) and by the stack made of two sheet glasses (4) and the
dye lasers—by the dielectric mirrors with the reflection index of 100 and 60%,
accordingly (10).
Thereafter, the first mirror was replaced by the reflecting grating (7), which can
be seen on the scheme (Fig. 1.1). During the substitution of 100% dielectric mirror
for the diffraction grating (7) (1200 lines/mm with the first reflection index of 70%),
the narrowing of the generation spectrum up to 0.6–2.0 nm occurred. The graduated
frequency tuning in the spectral region of 570–620 nm was ensured by the diffraction
Fig. 1.1 Photography (a) and the optical scheme (b) of Rhodamine 6G laser with laser pumping.
Reprinted from [54] with permission
1 Resonance Methods for Increasing Sensitivity of Interferometry …
Rhodamine 6G with the wavelength-tuned radiation of 570–620 nm (that coincides
with resonance sodium of natrium NaI—589 nm and 589.6 nm) was chosen.
In Fig. 1.1, the optical scheme of the laser facility can be seen. The optical pumping
of the cell with the Rhodamine 6G alcoholic solution was made by the second ruby
laser harmonic, working in Q-switched mode. Ruby laser resonator is formed by
100% dielectric mirror (1) and by the stack made of two sheet glasses (4) and the
dye lasers—by the dielectric mirrors with the reflection index of 100 and 60%,
accordingly (10).
Thereafter, the first mirror was replaced by the reflecting grating (7), which can
be seen on the scheme (Fig. 1.1). During the substitution of 100% dielectric mirror
for the diffraction grating (7) (1200 lines/mm with the first reflection index of 70%),
the narrowing of the generation spectrum up to 0.6–2.0 nm occurred. The graduated
frequency tuning in the spectral region of 570–620 nm was ensured by the diffraction
Fig. 1.1 Photography (a) and the optical scheme (b) of Rhodamine 6G laser with laser pumping.
Reprinted from [54] with permission