Optical characteristics of concentrated dye solutions and generation of the third harmonic in them

Al'perovich, L. I.; Babaev, T. B.; Shabalov, V. V.

doi:10.1007/bf00615606

Cited by 8 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phase-matched third-harmonic generation of Nd: laser radiation in organic dye solutions was studied in [14][15][16][17][18][19]. Dyes having the S 0 -S l absorption peak between the fundamental and third-harmonic frequency were selected for a low absorption cross section at the third-harmonic frequency.…”

Section: Pacsmentioning

confidence: 99%

“…The dependence of % (C PM ) on I 0L at high pumplaser intensities is used to estimate the field coefficients of the nonlinear refractive indices by fitting the solutions of (1) and (2) to the experimental data and applying the relations of (14)(15)(16)(17)(18). The field coefficients n 2 L L S of the solvents have been determined separately by external selffocusing studies [47] (n 2 L L S (HFIP) « 1 x 10 -22 m 2 V -2 , n. 2,LL,S (TFE) ^ 1.2 x 10 -22 m 2 V -2 ).…”

Section: Intensity-dependent Refractive Indicesmentioning

confidence: 99%

“…5 (PMC in TFE) and in Fig. 6 (PMC in HFIP) are calculated for different values of K (16)(17)(18). The dashed curves 3 apply to n = 0, i.e.…”

Section: Intensity-dependent Refractive Indicesmentioning

confidence: 99%

“…In the vapor phase efficient phase-matched third-harmonic generation of Nd: laser radiation was achieved in mixtures of alkali vapors and noble gases [2,[7][8][9][10][11][12][13]. The direct third-harmonic generation is caused by the third-order nonlinear optical susceptibility x (3) .Phase-matched third-harmonic generation of Nd: laser radiation in organic dye solutions was studied in [14][15][16][17][18][19]. Dyes having the S 0 -S l absorption peak between the fundamental and third-harmonic frequency were selected for a low absorption cross section at the third-harmonic frequency.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Phase-matched third-harmonic generation of Nd: Glass-laser picosecond pulses in a new cyanine-dye solution

et al. 1993

View full text Add to dashboard Cite

Abstract. The phase-matched direct tripling of picosecond light pulses of a mode-locked Nd: glass laser in a new cyanine dye PMC is studied. The solvents trifluoroethanol (TFE) and hexafluoroisopropanol (HFIP) are applied. The S Q -S l absorption peak of the dye is around A = 480 nm and the absorption cross section at the third-harmonic wavelength of A 3 = 351.3 nm is only a 3 « 1 x 10~1 9 cm 2 . Phase-matching occurred at concentrations of C PM = 0.0874 mol/dm 3 in HFIP and 0.1088 mol/dm 3 in TFE. A third-harmonic energy conversion efficiency of r] E « 0.01 was achieved at a pump-laser peak intensity of I 0L « 2.5 x 10 11 W/cm 2 in a 5 mm long sample of PMC in TFE. The conversion efficiency is limited by destruction of phase-matching due to the intensity-dependent nonlinear refractive index of the dye solutions. PACS: 42.65Efficient frequency tripling of laser radiation is performed generally in a two-step process first generating the secondharmonic light in a phase-matched nonlinear optical crystal and then frequency mixing the fundamental and the secondharmonic light in another phase-matched nonlinear optical crystal [1][2][3]. The second-order nonlinear optical susceptibility x ( 2 ) is responsible for these conversion processes. Direct (single-step) angle-tuned phase-matched third-harmonic generation of Nd:laser radiation was realized in the crystals LiI0 3 [4], CaC0 3 [5], and /3-BaB 2 0 4 [6]. In the vapor phase efficient phase-matched third-harmonic generation of Nd: laser radiation was achieved in mixtures of alkali vapors and noble gases [2,[7][8][9][10][11][12][13]. The direct third-harmonic generation is caused by the third-order nonlinear optical susceptibility x (3) .Phase-matched third-harmonic generation of Nd: laser radiation in organic dye solutions was studied in [14][15][16][17][18][19]. Dyes having the S 0 -S l absorption peak between the fundamental and third-harmonic frequency were selected for a low absorption cross section at the third-harmonic frequency. They were dissolved in a solvent of low normal refractive index dispersion. Phase-matching was achieved at a certain dye concentration at which the anomalous refractive index dispersion of the dyes compensated the normal refractive index dispersion of the solvents. For the dye PYC dissolved in hexafluoroisopropanol the absorption cross section at the third-harmonic frequency v 3 was cr 3 = 3.55 x 10~1 8 cm 2 , the two-photon absorption cross section was a^l = 1.8 x 10~4 9 cm 4 s and the excitedstate absorption cross section of third-harmonic light was a 3 e x = 2.6 x 10~1 6 cm 2 [18]. A maximum third-harmonic energy conversion efficiency of r] E = 2 x 10 -4 was achieved for input peak intensities J 0 L > 10 11 W/cm 2 (sample thickness I = 0.2 mm) [18]. The maximum obtainable conversion efficiency was limited by i) the small interaction length because of residual dye absorption at the third-harmonic frequency and ii) by two-photon dye absorption at twice the fundamental laser frequency and concomitant excited-state absorption of the dye....

show abstract

Section: Pacsmentioning

confidence: 99%

Section: Intensity-dependent Refractive Indicesmentioning

confidence: 99%

“…5 (PMC in TFE) and in Fig. 6 (PMC in HFIP) are calculated for different values of K (16)(17)(18). The dashed curves 3 apply to n = 0, i.e.…”

Section: Intensity-dependent Refractive Indicesmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Phase-matched third-harmonic generation of Nd: Glass-laser picosecond pulses in a new cyanine-dye solution

et al. 1993

View full text Add to dashboard Cite

show abstract

“…1) has a very strong absorption band around 530 nm and shows very weak absorption at 350 nm. These features make the dye a potential candidate for efficient conversion of intense picosecond Nd-glass laser pulses at X L = 1.055 jutm to X 3 = 351.7 nm by phase-matched thirdharmonic generation [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Concentration-dependent absorption and emission behaviour of a pyrimidonecarbocyanine dye in hexafluoroisopropanol

et al. 1987

View full text Add to dashboard Cite

Third-Order Nonlinear Susceptibilities of Dye Solutions Determined by Non-Phasematched Third Harmonic Generation

Penzkofer

Leupacher

1984

Ultrafast Phenomena IV

View full text Add to dashboard Cite

Optical characteristics of concentrated dye solutions and generation of the third harmonic in them

Cited by 8 publications

References 2 publications

Phase-matched third-harmonic generation of Nd: Glass-laser picosecond pulses in a new cyanine-dye solution

Phase-matched third-harmonic generation of Nd: Glass-laser picosecond pulses in a new cyanine-dye solution

Concentration-dependent absorption and emission behaviour of a pyrimidonecarbocyanine dye in hexafluoroisopropanol

Third-Order Nonlinear Susceptibilities of Dye Solutions Determined by Non-Phasematched Third Harmonic Generation

Contact Info

Product

Resources

About