wang_2015

D. Wang, L. Qiao, Z. Huang and Y. Leng, “Measuring electronic Kerr and rotational parameters of gases with hollow-core fibers”, J. Opt. Soc. Am. B 32, 2238 (2015)

Source record · Catalogue · Review register

DOI: 10.1364/JOSAB.32.002238

Source kind: theory

Recorded technique: A proposed method, tested only by numerical experiments: n2 from the self-phase-modulation broadening of a pulse in a gas-filled hollow-core fiber (Ar, 40 fs, 800 nm, 250 um, 50-1000 mbar), and for molecules (N2) n2,instant from few-cycle (5.3 fs) pulses plus the rotational constant and spin statistics from pump-probe spectral shifts, simulated with a nonlinear Schroedinger equation (Kerr, self-steepening, PPT ionization, plasma, rotational density matrix) whose inputs are the ‘true values’ of Table 2 (pp. 2239-2243). No measurement.

Materials in structured entries: N2

Dataset quantities: nonlinear_index, polarizability_anisotropy

Contents: 2 datasets; 0 formulas.

Curation notes

Journal pages 2238-2245 = PDF pages 1-8. Identity checked against the first page.

NO MEASURED VALUE. The ‘retrieved’ n2 are outputs of simulations run with known inputs: Ar in um2/(TW bar) in Figs. 1-2 only; N2 n2,instant retrieved with a 20-cm fiber ‘5.3834 +- 0.6277 um2/(TW bar)’ (800 nm) and ‘5.7077 +- 0.5510’ (400 nm) against the inputs 5.5 and 6.0 (p. 2242); B0 retrieved 1.984844 cm^-1 against 1.989581 (p. 2243). Not extracted (simulation outputs).

DEFINITIONS (p. 2239): Eq. (1) dE/dz = -(alpha/2) E + i (omega0/c) n2 |E|^2 E, E normalized to intensity (so n2 is the self coefficient), gamma = omega0 n2 / (c A_eff); Eq. (5): n2 bar = n2 per unit gas pressure (‘nonlinear refractive index per unit gas pressure’); p. 2242: Delta n_rot-Raman = (2 pi rho_nt Delta alpha / n0)(<<cos^2 theta>> - 1/3).

TABLE 2 (p. 2242; image checked; tools/extract/wang_2015.py): the N2 inputs. n2,instant at 800 nm = 5.5 um2/(TW bar), note a: ‘As it is the instantaneous part of n2, the value is half that in [23]’ ([23] = Loriot et al.’s erratum, Opt. Express 18, 3011 (2010), N2 11 x 10^-20 cm2/W at 1 bar). That erratum already gives the self coefficient (the factor 2 of the degenerate probe removed; wahlstrand_2013), so the halving is WRONG: ‘excluded’. n2,instant at 400 nm = 6.0, note b: ‘Derived according to generalized Miller formulas in [33]’ (Ettoumi et al. 2010 = ettoumi_2010) from the halved value: excluded with it. B0 = 1.989581 cm^-1, D0 = 5.76e-6 cm^-1, Delta alpha = 1.0 A^3, g_even = 2, g_odd = 1, note c = Ref. [29] (Herzberg, Molecular Spectra and Molecular Structure, 1989). Units: 1 um2/(TW bar) = 1e-20 cm2/W per bar.

Recorded bibliographic identity status: VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets

wang_2015/n2_instant_N2

{
  "id": "n2_instant_N2",
  "material": "N2",
  "file": "N2/wang_2015__n2_instant_N2.csv",
  "table": "tbl_1bb9ec2e9554",
  "quantity": "nonlinear_index",
  "unit": "cm2/W",
  "scale": 1e-20,
  "abscissa_unit": "nm",
  "state": {
    "pressure_pa": 100000.0,
    "temperature_k": 293.15
  },
  "use": "excluded",
  "reproduced_from": [
    "loriot_2010",
    "ettoumi_2010"
  ],
  "parameters": {
    "part": "instantaneous",
    "coefficient": "self"
  }
}

Table 2, n2,instant of N2 used as the simulations’ input, in um2/(TW bar) = 1e-20 cm2/W per bar (293.15 K assumed): 800 nm = half of Loriot et al.’s erratum value (11), wrongly (the erratum value is already the self coefficient); 400 nm derived from it with the generalized Miller formulas. Excluded: an erroneous reproduction.

wang_2015/dalpha_herzberg_N2

{
  "id": "dalpha_herzberg_N2",
  "material": "N2",
  "file": "N2/wang_2015__dalpha_herzberg_N2.csv",
  "table": "tbl_1bb9ec2e9554",
  "quantity": "polarizability_anisotropy",
  "unit": "angstrom3",
  "scale": 1.0,
  "abscissa_unit": "nm",
  "use": "reproduced",
  "reproduced_from": [
    "G. Herzberg, Molecular Spectra and Molecular Structure (Krieger, 1989)"
  ]
}

Table 2, Delta alpha = 1.0 A^3 (note c: Herzberg). One significant figure; wavelength not stated.

Formulas

No formulas are recorded.

Corrections

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.