Table 4. Other σ₂ values of Rhodamine 6G at selected wavelengths.

The σ₂ values showing satisfactory matching between two or more measurements are italicized in column 7. Recommended values of σ₂ are calculated as average of these numbers for each wavelength.

Wavelength (nm)	Solvent	Conc. (M)	Pulse	Original σ2 (GM)	Correction 1 σ2 (GM)	Correction 2 (final) σ2 (GM)	Ref.
694	C2H5OH	n/a	ns	355 ± 170	710 ± 355a	277 ± 138b	Hermann and Ducuing, 1972
694	CH3OH	0.04	30 ps	180 ± 20	-	180 ± 20	Sperber and Penzkofer, 1986
690	CH3OH	1.1 10−4	100 fs	136	-	156e	Albota et al., 1999
700				176
694	CH3OH	8 10−6	100 fs	112 ± 22	-	112 ± 22	Makarov et al., 2008
692	CH3OH	n/a	100 fs	202 ± 16	-	202 ± 16	de Reguardati et al., 2016
Suggested conditions and cross section value
694	CH3OH	10−5	100 fs			180 ± 23
730	CH3OH	8 10−6	100 fs	50 ± 10	-	50 ± 10	Makarov et al., 2008
730	CH3OH	n/a	100 fs	50 ± 4	-	50 ± 4	de Reguardati et al., 2016
Suggested conditions and cross section value
730	CH3OH	10−5	100 fs			50
812	CH3OH	8 10−6	100 fs	71 ± 14	-	71 ± 14	Makarov et al., 2008
812	CH3OH	n/a	100 fs	79 ± 6	-	79 ± 6	de Reguardati et al., 2016
Suggested conditions and cross section value
812	CH3OH	10−5	100 fs			75
940	CH3OH	1.1 10−4	100 fs	7.7	-	7.7	Albota et al., 1999
940	CH3OH	8 10−6	100 fs	8.3 ± 1.7	-	8.3 ± 1.7	Makarov et al., 2008
940	CH3OH	n/a	100 fs	11.1 ± 0.9	-	11.1 ± 0.9	de Reguardati et al., 2016
Suggested conditions and cross section value
940	CH3OH	10−5	100 fs			9.0 ± 1.0
960	CH3OH	1.1 10−4	100 fs	12.7	-	12.7	Albota et al., 1999
960	CH3OH	8 10−6	100 fs	10.9 ± 2.2	-	10.9 ± 2.2	Makarov et al., 2008
960	CH3OH	n/a	100 fs	17 ± 1.4	-	17.0 ± 1.4	de Reguardati et al., 2016
Suggested conditions and cross section value
960	CH3OH	10−5	100 fs			13 ± 2

^aMultiplied by factor 2 to conform with the more recent definition of σ₂ (two photons are needed to excite one molecule), cf. Xu and Webb (1996); Kaatz and Shelton (1999); Makarov et al. (2008).

^bMultiplied by factor 0.39 to conform with the current reference value of quartz, d₁₁ = 0.30 pm/V (versus 0.48 pm/V), see Kaatz and Shelton (1999).

^cRe-evaluated using the laser coherence function value g⁽²⁾ = 2, see Weber (1971); Bradley et al. (1972); Kaatz and Shelton (1999). That factor was not included in original analysis.

^dMultiplied by factor 4 to conform with the more recent definition of σ₂ (two photons are needed to excite one molecule), cf. Xu and Webb (1996); Kaatz and Shelton (1999); Makarov et al. (2008).

^eInterpolated between 690 and 700 nm measurements.