Study of photoproducts of Rhodamine 6G in ethanol upon powerful laser pumping

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Optics and Spectroscopy

OSTI ID:223806

Batishche, S A; Malevich, N A; Mostovnikov, V A ^[1]

---

1. Stepanov Institute of Physics, Minsk (Russian Federation)

Absorption spectra of rhodamine 6G in ethanol solution are measured using, the technique of laser probing upon pumping by a doubled Nd {sup 3+}:YAG laser with pulse length{tau}{sub 01}{approx_equal}16ns. It is shown that, at the pumping energy density {ge}1.5 J/cm{sup 2}, short-lived ({tau} < 25 ns) and long-lived photoproducts formed in the dye solution, which absorbed in a wide spectral range, including the lasing region. The estimates show that the probability of rhodamine 6G transformation to the photoproduct upon three-step excitation at 532 nm achieves {approximately}2.5 X 10{sup -3}. It is noted that, in order to obtain reliable spectroscopic information using this technique, one should take into account the intense scattering of probing radiation by thermal noise gratings, which are formed due to self-diffraction of the pumping radiation into noise components.

• OSTI ID: 223806
• Journal Information: Optics and Spectroscopy, Journal Name: Optics and Spectroscopy Journal Issue: 4 Vol. 78; ISSN OPSUA3; ISSN 0030-400X
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
ABSORPTION SPECTRA
ETHANOL
NEODYMIUM LASERS
OPTICAL PUMPING
PHOTOCHEMICAL REACTIONS
RHODAMINES