High UV average power at 15 kHz by frequency doubling of a copper HyBrID vapor laser in β-barium borate

Huot, N.; Jonin, Christian; Sanner, N.; Baubeau, Emmanuel; Audouard, Éric; Laporte, P.

doi:10.1016/s0030-4018(02)01812-6

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…Now, in order to show the excellent properties of the crystal for the fourth and fifth harmonic generation of Nd-based lasers, we will next briefly introduce the recent most interesting results. [53]. The total external conversion efficiency from the fundamental at 1064 nm to the fourth harmonic at 266 nm was more than 50%.…”

Section: Major Applicationsmentioning

confidence: 90%

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Borate Nonlinear Optical Crystals for Frequency Conversion

2012

Nonlinear Optical Borate Crystals

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After the discovery of BBO and LBO during 1979-1987, many research groups are involved in this field because the borate NLO crystals have several outstanding advantages, such as the relative larger second harmonic generation (SHG) coefficients, wide transparent spectral range on the UV side, high damage threshold, and so on. As a result, more than 20 borate NLO crystals have been discovered till now. In this chapter, we will introduce several typical borate crystals, which have indicated important applications, particularly in laser industry. These borate crystals include (1) b-BaB 2 O 4 (BBO), the basic structural unit of which is (B 3 O 6 ) 3À group. (2) LiB 3 O 5 (LBO) family, including CsB 3 O 5 (CBO) and CsLiB 6 O 10 (CLBO), the basic structural unit of which is (

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Section: Major Applicationsmentioning

confidence: 90%

“…53 The relationship of the conversion efficiency in 266 and 532 nm peak-power density (GW/cm 2 ) with KBBF grown by the flux method.…”

mentioning

confidence: 99%

Borate Nonlinear Optical Crystals for Frequency Conversion

2012

Nonlinear Optical Borate Crystals

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“…efficient high average power (∼watt level) second harmonic UV generation process [27][28][29][30][31]. In addition, the conditions of the SHG-UV from higher PRR variant copper lasers with different optical resonators are expected to be different from that of the high temperature, 5-10 kHz PRR variant CVLs owing to higher PRR and improved spatio-temporal laser gain characteristics of the former [1,2].…”

Section: Introductionmentioning

confidence: 99%

Studies on high power second-harmonic deep-UV generation from a high repetition-rate Cu-HBr laser

Biswal¹,

Prakash²,

Dixit³

2022

Laser Phys.

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This paper presents, for the first time, comprehensive studies on high power second harmonic deep ultraviolet (UV: λ ≈ 255.3 nm) generation from a low temperature, high repetition rate (18 kHz) variant of copper laser (Cu-HBr laser) with different optical resonators (plane–plane resonator and unstable resonators of magnifications 12.5, 50 & 100), pump-beam focussing condition and pump powers. With a type-I, critically phase matched β-barium borate (BBO) crystal as the harmonic generator and different pump average powers (⩽10 W) of the laser, the variation in UV average output powers and its conversion efficiencies were studied. The average UV power and conversion efficiency as high as about 2 W and 26% respectively were achieved. The experimental results were analysed in light of the beam quality attributes of the pump beams vis-à-vis limiting thermal and walk-off effects associated.

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“…We first present a model calculation using parameters from published experimental conditions to show and compare the relative effects of the pulse delay, input polarization, and orientation of the nonlinear crystals on the output power. Finally, since -BaB 2 O 4 (BBO) and CLBO nonlinear optical crystals are quite readily commercially available nowadays for deep UV generation, [20][21][22][23] we present a calculation using our model to compare the merits of using these two crystals for efficient fourth and fifth-harmonic generation (5HG) of a Q-switched diode-pumped Nd:YAG laser.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Fifth-Harmonic Conversion of Low-Power Pulsed Nd:YAG Laser with Resonance of Second Harmonic

Chang

Wang

Kung

2003

Jpn. J. Appl. Phys.

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A model for the fifth-harmonic generation of pulsed IR lasers involving an external ring cavity resonating at the second harmonic has been developed. Numerical analysis is performed to show the relative effects of the pulse delay, input polarization, and orientation of the nonlinear crystals on the fifth harmonic power. The results are validated by published experimental results. The model is used to analyze and obtain the optimal combination of nonlinear optical crystals for the fifth-harmonic generation. Our calculation shows that the combination of LiB 3 O 5 (LBO), CsLiB 6 O 10 (CLBO), and CLBO crystals for the second-harmonic, fourth-harmonic, and fifth-harmonic generation steps respectively gives an approximate conversion of 30% from the fundamental to the fifth harmonic power, resulting in 2 W at 213 nm for an input of 7 W at 1064 nm.

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High UV average power at 15 kHz by frequency doubling of a copper HyBrID vapor laser in β-barium borate

Cited by 9 publications

References 13 publications

Borate Nonlinear Optical Crystals for Frequency Conversion

Borate Nonlinear Optical Crystals for Frequency Conversion

Studies on high power second-harmonic deep-UV generation from a high repetition-rate Cu-HBr laser

Numerical Analysis of Fifth-Harmonic Conversion of Low-Power Pulsed Nd:YAG Laser with Resonance of Second Harmonic

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