Optical second harmonic generation properties of BiB3O6

Abstract

We present studies of the optical properties of the new nonlinear material BiB3O6 for second harmonic generation from the visible to infrared. We have determined the phase-matching conditions and effective nonlinear coefficients in the three principal optical planes, acceptance bandwidths, spatial and temporal walkoff, group velocity dispersion and double phase-matching behaviour. We also report on experimental studies in this material, where efficient, high-average-power second harmonic generation of femtosecond pulses into the blue is demonstrated. Using 130-fs fundamental pulses at 76 MHz, single-pass second harmonic average powers as much as 830 mW at greater than 50% conversion efficiency have been generated over a tunable range of 375-435 nm. Using cross-correlation measurements in a 100-mum beta-BaB2O4 crystal second harmonic pulse durations of 220 fs are obtained. Our theoretical findings are verified by experimental data, where excellent agreement between the calculations and measurements is obtained. Direct comparison of BiB3O6 with beta-BaB2O4 also confirms improved performance of this new material for second harmonic generation of femtosecond pulses.

Femtosecond nonlinear frequency conversion based on BiB3O6

“…In fact, this corresponds to the tradition established in the nonlinear optics of monoclinic crystals [69]. Indeed, it was not before the nonlinear coefficients were transformed into this orthogonal dielectric xyz frame [70] that BIBO attracted the interest of several groups working in the field of nonlinear frequency conversion. For point group 2 symmetry, one of the principal optical axes (the x-axis in BIBO [1]) coincides with the 2-fold symmetry axis b, but the position of the other two axes depends both on wavelength and temperature (the xyz frame rotates about the b-axis).…”

“…1, which corresponds to a wavelength of 810 nm [70]. The results summarized in Table 1 of [70] indicate that the deviation from the Kleinman conjecture [67] does not exceed ±10%, which equals the experimental error [68]. Thus, it is justified to assume that Kleinman symmetry holds and average the corresponding d il values.…”

Synthesis and spectroscopy of tetraborate glasses doped with copper

“…Borate compounds (crystals and glasses), un-doped and doped with transition and rare-earth elements are very promising for quantum electronics and non-linear optics [1,2] scintillators and tissue-equivalent materials for thermoluminescent (TL) dosimetry [3][4][5], as well as γ and neutron detectors [6][7][8]. This also concerns lithium tetraborate crystals which are characterized by extremely high radiation stability [9,10], high transparency in a wide spectral range from VUV to far IR [11] and good TL properties [4][5][6][7][8].…”

Synthesis and spectral analysis of Sm:BaB4O7 microfibers embedded in borate glass

“…Glass ceramics contain generally a higher mechanical and chemical stability [15,16]. Especially, borate glassceramics are attractive due to their vast commercial applications in scintillators and tissue-equivalent materials for thermoluminescence (TL) dosimeters, γ and neutron detectors [17][18][19], and nonlinear optical ceramic properties [20,21]. Changmin et al reported various optical properties of Sm 3 þ in fluoroborate ceramic [22].…”

“…Powder X-ray diffraction (XRD) measurements were carried out using Cu, K α radiation from a RINT/DMAX 2200H/PC (Rigaku, Japan) machine having a scan speed 21 for GC8, GC10, GC15, GC20, and GC24 samples, respectively, which is higher than the as-prepared glass 2.36 g/cm 3 . Refractive indices were determined by Brewster's angle method using red (632.9 nm) He:Ne lasers which were interference free from Sm 3 þ ion absorption peaks.…”