Optical, mechanical, and thermal properties of barium borate

Eimerl, D.; Davis, Laura E.; Velsko, Stephan P.; Graham, E. K.; Zalkin, A.

doi:10.1063/1.339536

Cited by 619 publications

(204 citation statements)

References 17 publications

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“…β-BBO with a crystal structure of R3c has the lattice parameters of a = b = 1.2547 nm and c = 1.2736 nm (Eimerl et al, 1987), indicating that the difference in the lattice parameters is very small. As well known, however, β-BBO has a large anisotropic structure, in which planar [B3O6] 3-units stack along the c-axis direction, and Ba 2+ ions are located between stacked [B3O6] 3-units.…”

Section: Resultsmentioning

confidence: 99%

Nucleation and Crystal Growth in Laser-Patterned Lines in Glasses

Komatsu

Honma

2016

Front. Mater.

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Laser-induced crystallization is a new method for the design and control of the crystallization of glasses and opens a new door in the study of nucleation and crystal growth in glasses. Nonlinear optical Sm-doped β-BaB2O4 (β-BBO) crystal lines were patterned by continuous-wave Yb:YVO4 fiber laser (wavelength 1080 nm) in 8Sm2O3-42BaO-50B2O3 glass as an example, and nucleation and crystal growth behaviors in the laser-patterned bending and crossing lines were examined. It was confirmed that the growth of c-axis oriented β-BBO crystals follows along the laser scanning direction even if laser scanning direction changes. The model of self-organized homo-epitaxial crystal growth was demonstrated for the orientation of β-BBO crystals at the crossing point of two lines, in which the first crystal line at the crossing point acts as nucleation site for the second crystal line. This study proposes a new crystal growth technology.

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Section: Resultsmentioning

confidence: 99%

Nucleation and Crystal Growth in Laser-Patterned Lines in Glasses

Komatsu

Honma

2016

Front. Mater.

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“…As the phase-matching cutoff for third-harmonic generation (THG) in BBO crystals is at 196 nm it should in principle be possible to use the same technique at 202 nm although a lower efficiency of the THG might pose additional problems. 39 Note that it is not possible to obtain 202 nm radiation by frequency doubling in a BBO crystal because the phase-matching cutoff for this process is at 204.8 nm. 40 Frequency-comb lasers are increasingly used for calibration and stabilisation of UV, visible, and infrared laser radiation with an accuracy and stability of better than 100 kHz.…”

Section: A the X / Ef Intervalmentioning

confidence: 99%

Towards measuring the ionisation and dissociation energies of molecular hydrogen with sub-MHz accuracy

et al. 2011

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The most precise determination of the ionisation and dissociation energies of molecular hydrogen H 2 was carried out recently by measuring three intervals independently: the X / EF interval, the EF / n ¼ 54p interval, and the electron binding energy of the n ¼ 54p Rydberg state. The values of the ionisation and dissociation energies obtained for H 2 , and for HD and D 2 in similar measurements, are in agreement with the results of the latest ab initio calculations [Piszczatowski et al., J. Chem. Theory Comput., 2009, 5, 3039; Pachucki and Komasa, Phys. Chem. Chem. Phys., 2010, 12, 9188] within the combined uncertainty limit of 30 MHz (0.001 cm À1 ). We report on a new determination of the electron binding energies of H 2 Rydberg states with principal quantum numbers in the range n ¼ 51-64 with a precision of better than 100 kHz using a combination of millimetre-wave spectroscopy and multichannel quantumdefect theory (MQDT). The positions of 33 np (S ¼ 0) Rydberg states of ortho-H 2 relative to the position of the reference 51d (Rydberg state have been determined with a precision and accuracy of 50 kHz. By analysing these positions using MQDT, the electron binding energy of the reference state could be determined to be 42.3009108(14) cm À1 , which represents an improvement by a factor of $7 over the previous value obtained by Osterwalder et al. [J. Chem. Phys., 2004, 121, 11810]. Because the electron binding energy of the high-n Rydberg states will ultimately be the limiting factor in our method of determining the ionisation and dissociation energies of molecular hydrogen, this result opens up the possibility of carrying out a new determination of these quantities. By evaluating several schemes for the new measurement, the precision limit is estimated to be 50-100 kHz, approaching the fundamental limit for theoretical values of $10 kHz imposed by the current uncertainty of the proton-to-electron mass ratio.

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“…Calculations indicate that BBO should be an excellent nonlinear crystal for doubling 1.55 µm, because the group velocity mismatch between the fundamental and second harmonic generation (SHG) approaches zero near 1.5 µm, according to the Sellmeier equations from [117]. With 85 mW of compressed fundamental power focused onto a 1-cm antireflection (AR)-coated BBO crystal with an AR-coated 75-mm focal-length lens, frequency-doubled powers as high as 8.7 mW were achieved, corresponding to 10% conversion efficiency and pulse energies of 270 pJ.…”

Section: Frequency Doubling Of the Stretched-pulse Lasermentioning

confidence: 99%

Ultrashort-pulse fiber ring lasers

Nelson¹,

Jones²,

Tamura³

et al. 1997

Applied Physics B: Lasers and Optics

753

385

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Abstract. This paper reviews recent progress on ultrashort pulse generation with erbium-doped fiber ring lasers. The passive mode-locking technique of polarization additive pulse mode-locking (P-APM) is used to generate stable, selfstarting, sub-500 fs pulses at the fundamental repetition rate from a unidirectional fiber ring laser operating in the soliton regime. Saturation of the APM, spectral sideband generation, and intracavity filtering are discussed. Harmonic modelocking of fiber ring lasers with soliton pulse compression is addressed, and stability regions for the solitons are mapped and compared with theoretical predictions. The stretchedpulse laser, which incorporates segments of positive-and negative-dispersion fiber into the P-APM fiber ring, generates shorter (sub-100 fs) pulses with broader bandwidths (> 65 nm) and higher pulse energies (up to 2.7 nJ). We discuss optimization of the net dispersion of the stretched-pulse laser, use of the APM rejection port as the laser output port, and frequency doubling for amplifier seed applications. We also review the analytical theory of the stretched-pulse laser as well as discuss the excellent noise characteristics of both the soliton and stretched-pulse lasers. 42.60F; 42.65; 42.80 Fiber lasers were made possible in the 1960s by the incorporation of trivalent rare-earth ions such as neodymium, erbium, and thulium into glass hosts [1]. Soon thereafter neodymium was incorporated into the cores of fiber waveguides [2,3]. Due to the high efficiency of the Nd +3 ion as a laser, early work focused on Nd +3 -doped silica fiber lasers operating at 1.06 µm [4]. Doping of silica fibers with Er +3 ions was not achieved until the 1980s [5,6]. Since that time Er +3 -doped fiber lasers have received much attention, because the lasing wavelength at 1.55 µm falls within the low-loss window of optical fibers and thus is suitable for optical fiber communications. Rare-earth ions such as Ho +3 [7,8], Tm +3 [9-11], and * Current address: Lucent Technologies/Bell Labs, 791 Holmdel-Keyport Road, Holmdel, NJ, USA * * Current address: NTT Access Network Systems Laboratory, Tokai-mura, Naka-gun, Ibaraki-ken 319-11, Japan Yb +3 [12,13] have also been used as dopants or co-dopants in silica or fluoride fibers, allowing new lasing or pumping wavelengths, and Pr +3 has been incorporated into fluoride fiber, providing emission at 1.3 µm [14,15]. PACS:Among the numerous advantages of fiber lasers are simple doping procedures, low loss, and the possibility of pumping with compact, efficient diodes. The fiber itself provides the waveguide, and the availability of various fiber components minimizes the need for bulk optics and mechanical alignment. Many different cavity configurations can be easily built with fibers and fused-fiber couplers, including linear FabryPerot, ring, and combinations of the two. Enhancement of the fiber nonlinearity due to large signal intensities and long interaction lengths is an additional advantage of fiber lasers that is particularly important for mode-locki...

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Optical, mechanical, and thermal properties of barium borate

Cited by 619 publications

References 17 publications

Nucleation and Crystal Growth in Laser-Patterned Lines in Glasses

Nucleation and Crystal Growth in Laser-Patterned Lines in Glasses

Towards measuring the ionisation and dissociation energies of molecular hydrogen with sub-MHz accuracy

Ultrashort-pulse fiber ring lasers

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