Cause and repair of optical damage in nonlinear optical crystals of BiB3O6

Jang, Jong Hyun; Yoon, In Ho; Yoon, Choon Sup

doi:10.1016/j.optmat.2008.08.006

Cited by 16 publications

(12 citation statements)

References 14 publications

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“…BIBO is a chemically stable and nonhygroscopic crystal [47][48][49]. Besides the damage levels listed in Table 3, photorefractive effects have been observed in SHG with tightly focused CW beams [17,27,104]. Information on other characteristics such as electro-optic, piezoelectric and elastic properties, can be found in [79] and [105].…”

Section: Bibo: Relevant Propertiesmentioning

confidence: 99%

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Petrov¹,

Ghotbi

Kokabee

et al. 2010

Laser & Photonics Reviews

112

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We review the physical properties, linear and nonlinear optical characteristics, and phase-matching configurations of BiB3O6 (BIBO), the first low-symmetry (monoclinic) inorganic nonlinear crystal that has found broad applications for frequency conversion of laser sources from the UV, across the visible, to the near-IR based on three-wave interactions. We describe in detail the most relevant optical properties that make this material an attractive candidate for nonlinear frequency conversion of laser light in general, and ultrafast femtosecond laser sources in particular. With special focus on ultrafast frequency conversion, characteristics such as group-velocity mismatch and spectral acceptance, parametric gain bandwidth, group-velocity dispersion, as well as angular acceptance and spatial walk-off are evaluated and optimum configurations for the attainment of maximum conversion efficiency, minimum pulse duration, and highest spatial beam quality are identified and compared with the most widely established alternative borate crystal, β-BaB2O4. Experimental results are presented on both parametric up-and down-conversion of femtosecond pulses, from the high-energy, low-repetition-rate (1 kHz) to the low-energy, high-repetitionrate (56-76 MHz) regime, demonstrating the unique versatility of BIBO for efficient frequency conversion of femtosecond pulses with broad tunability from 250 nm in the UV, throughout the visible, up to ∼ 3000 nm in the IR.Photograph of a femtosecond synchronously pumped optical parametric oscillator (SPOPO) based on BiB3O6 emitting in the yellow region of the spectrum. Pumped near 400 nm in the blue by the second harmonic of a Kerr-lens mode-locked Ti:sapphire laser, the SPOPO can generate femtosecond pulses across the full visible range of 480-710 nm, from the blue-green, through to yellow, orange and red.

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Section: Bibo: Relevant Propertiesmentioning

confidence: 99%

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Petrov¹,

Ghotbi

Kokabee

et al. 2010

Laser & Photonics Reviews

112

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“…BiBO crystals were reported to be susceptible to optical damage by cw UV and green lasers at high intensities with a concomitant decrease in frequency conversion efficiency [21][22][23]. They were also optically damaged by a cw Ar-ion laser of 476, 488, and 515 nm wavelengths, which was caused by photorefraction [24]. However, no damage was observed by the irradiation of IR light.…”

Section: Resultsmentioning

confidence: 99%

“…The shorter the wavelength and the higher the beam intensity, the larger the change in birefringence of the BiBO crystals. The change in refractive index was clearly visible along the beam path and remained permanent at room temperature, but it disappeared completely after annealing of the BiBO crystals at 300°C for 24 h [24]. Considering that the wavelength of the Yb fiber laser used in the present study belongs to the IR region, the PR effect of the BiBO crystals can be caused by the frequency-doubled Nd:YAG pump laser, which was operated at a wavelength of 532 nm with a pulse width of 7 ns.…”

Section: Resultsmentioning

confidence: 99%

Highly efficient optical parametric chirped-pulse amplification based on BiB3O6 and β-BaB2O4 crystals at low pump intensity

Yun

Hong

Kim

et al. 2011

Optics Communications

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“…6, the UV power exhibits a long-term drift resulting in a slow decline from 1.2 W down to ∼1 W after 14 h. By translating the crystal to focus the input beams to a new position inside the BIBO, we could readily recover the maximum UV power. This long-term drift in UV power could be attributed to photo-induced damage [16], two-photon absorption, or dynamic color center formation, previously observed in borate crystals [17]. However, photo-induced damage in BIBO can be repaired with high-temperature annealing at ∼300°C [16], thus potentially improving the long-term power stability.…”

mentioning

confidence: 88%

“…This long-term drift in UV power could be attributed to photo-induced damage [16], two-photon absorption, or dynamic color center formation, previously observed in borate crystals [17]. However, photo-induced damage in BIBO can be repaired with high-temperature annealing at ∼300°C [16], thus potentially improving the long-term power stability. Confirmation of the origin of the long-term power drop requires further studies.…”

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confidence: 88%

Stable, high-power, Yb-fiber-based, picosecond ultraviolet generation at 355 nm using BiB_3O_6

2015

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We report a stable, high-power, high-repetition-rate, picosecond ultraviolet (UV) source at 355 nm based on singlepass sum-frequency generation of a mode-locked Yb-fiber laser at 1064 nm in the nonlinear crystal BiB 3 O 6 . By performing single-pass second-harmonic generation (SHG) in a 30-mm-long LiB 3 O 5 crystal, up to 9.1 W of average green power at 532 nm is obtained at a single-pass SHG efficiency of 54%. The generated green pulses have a duration of 16.2 ps at a repetition rate of 79.5 MHz, with a passive power stability better than 0.5% rms and a pointing stability <12 μrad over 1 h, in high beam quality. The green radiation is then sum-frequency-mixed with the fundamental in a 10-mm-long BiB 3 O 6 crystal, providing as much as 1.2 W of average UV power, at an infrared-to-UV conversion efficiency of 7.2%, with a passive power stability better than 0.4% rms over 3 h and a pointing stability <45 μrad over 1 h, in TEM 00 spatial profile. . For many years, the development of such ultrafast sources has relied almost entirely on nonlinear optical techniques based on third (∼355 nm) and fourth (∼266 nm) harmonic generation of widely established mode-locked Nd/Yb-doped solid-state lasers at ∼1064 nm. The rapid advances in fiber laser technology in recent years, however, have paved the way for the replacement of bulky, water-cooled, mode-locked solidstate lasers with compact, air-cooled, ultrafast Yb-fiber lasers at ∼1064 nm. With the availability of multiwatt average powers, and the potential for further power scaling, the exploitation of mode-locked Yb-fiber lasers thus offers great promise for the realization of efficient and high-power picosecond UV sources in more practical designs by deploying third and fourth harmonic generation schemes. On the other hand, to fully exploit the advantages of fiber lasers with regard to a compact architecture, simplicity, and portability, it would also be crucial to deploy the most direct nonlinear techniques for UV generation in order to preserve those important merits. To this end, single-pass conversion schemes offer the most effective approach to achieve this goal. We have already verified the viability of such single-pass schemes in combination with continuous-wave (cw) and modelocked Yb-fiber lasers for efficient generation of highpower cw radiation in the green and UV [4], and high-average-power picosecond pulses in the green [5]. Recently, a fiber-based femtosecond green source was also demonstrated [6]. At the same time, a critical factor in the attainment of the highest nonlinear conversion efficiency and output power is the choice of suitable nonlinear materials. For UV generation, this choice is particularly limited and is especially challenging when low-intensity picosecond pulses at high repetition rates are involved. In addition to a wide transparency in the UV, of paramount importance are a sufficiently high effective nonlinearity, low spatial walk-off, high optical damage threshold, low transmission loss, and high optical quality, as well as chemical and the...

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Cause and repair of optical damage in nonlinear optical crystals of BiB3O6

Cited by 16 publications

References 14 publications

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Femtosecond nonlinear frequency conversion based on BiB₃O₆

Highly efficient optical parametric chirped-pulse amplification based on BiB3O6 and β-BaB2O4 crystals at low pump intensity

Stable, high-power, Yb-fiber-based, picosecond ultraviolet generation at 355 nm using BiB_3O_6

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Cause and repair of optical damage in nonlinear optical crystals of BiB3O6

Cited by 16 publications

References 14 publications

Femtosecond nonlinear frequency conversion based on BiB3O6

Femtosecond nonlinear frequency conversion based on BiB3O6

Highly efficient optical parametric chirped-pulse amplification based on BiB3O6 and β-BaB2O4 crystals at low pump intensity

Stable, high-power, Yb-fiber-based, picosecond ultraviolet generation at 355 nm using BiB_3O_6

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Femtosecond nonlinear frequency conversion based on BiB₃O₆

Femtosecond nonlinear frequency conversion based on BiB₃O₆