1.5 New Class of Detecting Media for Holography—Gaseous Media …
43
Fig. 1.33 Spectrograms produced in the result of passing through radiation sodium vapors: a dye
laser; b homogeneous heat source. Reprinted from [54] with permission
compare the results of microphotometry with the same intensity relations, which
were on spectrograms produced in dye laser radiation. On the control spectrograms, the effect did not appear, so it shows the absence of errors connected with
microphotometric measurement.
The observed effect of energy redistribution from the strong wave to the weak one
qualitatively matches to the summary of the theoretical treatment of 3D amplitude
dynamic holograms. This treatment was held in the work [95]. The results of the
diffraction on the volume amplitude dynamic grating are shown in Fig. 1.34. This
figure shows the ratio of normalized intensities of a weak beam and strong one
depending on the wavelength. The strongest effect could be observed under the
sodium vapors concentration of 10
16 cm
−3 . Under the concentration of 10
14 cm
−3 ,
it almost disappeared.
1.6 Study of the Influence of Mismatch of the Polarization
Planes of Beams Forming Bulk Diffraction Grating
on the Self-diffraction Process
In the conditions, which provide the recording of 3D dynamic holograms in sodium
vapors, several experiments with beams, polarization planes of which were turned
relative to each other, were carried out. For this purpose into one of the Mach–Zehnder
interferometer arms, the quartz plate was included. It turned the polarization plane
of the initial beam at 120°. Into another interferometer arm glass plate and filter were
included. It compensated the optical path difference and created intensity relation
of interfering beams equal to 1:15. For matching the direction of polarization plane
43
Fig. 1.33 Spectrograms produced in the result of passing through radiation sodium vapors: a dye
laser; b homogeneous heat source. Reprinted from [54] with permission
compare the results of microphotometry with the same intensity relations, which
were on spectrograms produced in dye laser radiation. On the control spectrograms, the effect did not appear, so it shows the absence of errors connected with
microphotometric measurement.
The observed effect of energy redistribution from the strong wave to the weak one
qualitatively matches to the summary of the theoretical treatment of 3D amplitude
dynamic holograms. This treatment was held in the work [95]. The results of the
diffraction on the volume amplitude dynamic grating are shown in Fig. 1.34. This
figure shows the ratio of normalized intensities of a weak beam and strong one
depending on the wavelength. The strongest effect could be observed under the
sodium vapors concentration of 10
16 cm
−3 . Under the concentration of 10
14 cm
−3 ,
it almost disappeared.
1.6 Study of the Influence of Mismatch of the Polarization
Planes of Beams Forming Bulk Diffraction Grating
on the Self-diffraction Process
In the conditions, which provide the recording of 3D dynamic holograms in sodium
vapors, several experiments with beams, polarization planes of which were turned
relative to each other, were carried out. For this purpose into one of the Mach–Zehnder
interferometer arms, the quartz plate was included. It turned the polarization plane
of the initial beam at 120°. Into another interferometer arm glass plate and filter were
included. It compensated the optical path difference and created intensity relation
of interfering beams equal to 1:15. For matching the direction of polarization plane