UDC 535.341.08
CSCSTI 29.33
Russian Classification of Professions by Education 03.04.02
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 6135
BISAC TEC019000 Lasers & Photonics
The method of optical-acoustic detection is used to study the dependence of the absorption of gas medium and atmospheric air on the intensity of the laser pulse interacting with the gas. The small length of the gas cell of the optical-acoustic detector allows, when focusing the radiation, to obtain intensity values under study, at which, along with the radiation of the excitation laser, the Stokes component of the SRS is generated (in atmospheric nitrogen). In laser wavelength tuning, the wavelength of the Stokes component is also tuned and can be absorbed by the molecular components of the air, contributing to the value of the recorded signal. The report estimates the value of this additional absorption for two types of solid-state lasers Nd: YAG and Nd: YLF and the molecular components of atmospheric air CO, SO2, CH4, C2H2, N2O, NH3 using an optical-acoustic detector.
laser, absorption, stimulated Raman scattering, optoacoustics
1. Ponomarev Yu.N. Nelineynye spektroskopicheskie effekty v molekulyarnyh gazah i ih vliyanie na rasprostranenie lazernyh puchkov v atmosfere // Optika atmosfery i okeana. 1996. T. 9. № 11. S. 1509-1518.
2. Kiselev A.M., Ponomarev Yu.N., Stepanov A.N., Tihomirov A.B., Tihomirov B.A. Nelineynoe pogloschenie femtosekundnyh lazernyh impul'sov (800 nm) atmosfernym vozduhom i vodyanym parom // Kvantovaya elektronika. 2011. T. 41. № 11. S. 976.
3. Veber A. Spektroskopiya kombinacionnogo rasseyaniya sveta v gazah i zhidkostyah. – M. Mir, 1982. – 376s.
4. [Elektronnyy resurs]: Nd:YLF - Lazernyy kristall ittriy-litievogo ftorida, legirovannyy neodimom: AO «LLS». https://lenlasers.ru/product/ndylf-lazernyj-kristall-ittrij-litievogo-ftorida-legirovannyj-neodimom/?ysclid=lr7fn78ifl28432608
5. [Elektronnyy resurs]: Lazery s perestroykoy chastoty - Spravochnik himika 21 (chem21.info). https://chem21.info/info/147090/?ysclid=lr7f4m4afj391655615
6. Zuev V.E. Rasprostranenie lazernogo izlucheniya v atmosfere. – M.: Radio i svyaz', 1981. – 288 s.
7. Baranov Yu.I. Eksperimental'noe issledovanie inducirovannogo i kontinual'nogo pogloscheniya IK-radiacii osnovnymi atmosfernymi gazami. Dissertaciya doktora fiziko-matematicheskih nauk: 01.04.05. SPbGU. – Sankt-Peterburg, 2014. – 203 s.
8. [Elektronnyy resurs]: Perevod koncentracii gazov. PDK gazov. Perevodnye koefficienty iz mg/m3 v ppmv. Tablica dlya vzryvoopasnyh i toksichnyh veschestv po GOST 51330.19-99, GOST 12.1.005-88, VSN 64-86. https://dpva.ru/Guide/GuideChemistry/Concentration/GasesConcentration/
9. [Elektronnyy resurs]: Onlayn spravochnik veschestv. Perechen' i kody veschestv, zagryaznyayuschih atmosferu. http://voc.integral.ru/index.php?pageNum_voc_records=9&totalRows_voc_records=157#.YoNJkjj7RaQ
10. Averbah V.S., Makarov A.I., Talanov V.N. VKR na vraschatel'nyh i kolebatel'nyh perehodah v gazoobraznom azote // Kvantovaya elektronika. 1978. T. 5. № 4. S. 823-829.
11. Antipov A.B., Kapitanov V.A, Ponomarev Yu.N., Sapozhnikova V.A. Optiko-akusticheskiy metod v lazernoy spektroskopii molekulyarnyh gazov.- Novosibirsk.: Nauka, 1094. – 128 s.
