Z-Scan studies of KYW, KYbW, KGW, and Ba(NO3)2 crystals

Водчиц, А. И.; Kozich, V.; Orlovich, V. A.; Апанасевич, П. А.

doi:10.1016/j.optcom.2006.01.030

Cited by 29 publications

(28 citation statements)

References 25 publications

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“…The third order nonlinearity data of the 4NASA crystal were compared with the reported values of some well-known NLO materials like Ba(NO 3 ) 2 , KTA, MeCu [13][14][15] and presented in Table 1. It reveals that n 2 value of 4NASA crystal is higher than the referred crystal.…”

Section: Investigation On Crystal Structure Third-order Nonlinear Opmentioning

confidence: 99%

Investigation On The Crystal Structure, Third-Order Nonlinear Optical And Thermal Studies Of 4-Nitroanilinium 5-Sulfosalicylic Acid Monohydrate Single Crystal

S.R.¹,

P.K.²,

M³

et al. 2015

Photon. Lett. Poland

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Section: Investigation On Crystal Structure Third-order Nonlinear Opmentioning

confidence: 99%

Investigation On The Crystal Structure, Third-Order Nonlinear Optical And Thermal Studies Of 4-Nitroanilinium 5-Sulfosalicylic Acid Monohydrate Single Crystal

S.R.¹,

P.K.²,

M³

et al. 2015

Photon. Lett. Poland

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“…The process of stimulated Raman scattering can develop efficiently in such crystals, and SRS is itself a nonlinear optical effect and consequently can have a considerable effect on the measurement results. In our papers [10,11], however, we have shown that using ultrashort pulses and thin crystalline samples leads to a significant increase in the SRS threshold, and allows us to eliminate the effect of the SRS process on the measurement results for the nonlinear refractive index and the nonlinear absorption coefficient by the Z-scan method.…”

mentioning

confidence: 99%

“…We previously used single-beam Z-scanning, employing laser pulses of duration 1 ps, repetition frequency 1 kHz, and λ = 790 nm and 395 nm, to study the nonlinear optical characteristics of such Raman-active crystals as barium nitrate and tungstate, KGW, KYW, and KYbW [10,11] nonlinear absorption coefficients. We showed that these crystals are characterized by significantly greater nonlinear refraction than for the reference sample: fused quartz.…”

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Nonlinear refractive index of vanadate crystals in the near IR region

2012

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We used the single-beam Z-scan method, employing picosecond laser pulses with λ = 1064 nm, to measure the nonlinear refractive index and nonlinear absorption in vanadate crystals, which are promising for design of laser sources. We have established that there is practically no nonlinear absorption in these crystals in the near IR range and that doping them with neodymium ions leads to a significant reduction in the nonlinear refraction. This effect can be used to partially compensate for the negative impact of nonlinear refraction on the lasing characteristics of lasers.

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“…These crystals have strong Raman-active vibrations and comparatively weak nonlinear refraction [9][10][11][12][13]. The ends of the crystals were antireflection coated at the pump wavelengths.…”

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confidence: 99%

Kilohertz raman lasers based on bno and kgw crystals for a wide spectral range

et al. 2010

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UDC 621.375.826+548 Efficient Raman lasers based on Ba(NO 3 ) 2 and KGd(WO 4 ) 2 crystals which produce nanosecond pulses with repetition rates of 1 and 4 kHz at 26 wavelengths between 280 and 1600 nm are developed and studied. A maximum SRS conversion efficiency of 25% is obtained. It is found that the divergence of the beams generated by the Raman laser can be significantly reduced by using quasi-Bessel pump beams and an unstable telescope cavity.Introduction. Pulsed UV, visible, and near infrared laser sources are used in spectroscopy, medicine, ecology, and other areas. The repetition rate of the pulses from existing sources usually is at most a few tens of Hertz, which limits their range of applications and efficiency. Thus, there is considerable interest in developing higher pulse repetition rates, especially in the kilohertz range. We believe that a comparatively simple and effective approach to solving this problem may be to create lasers based on the stimulated Raman scattering (SRS) of light in Raman active crystals (Raman lasers) [1][2][3][4][5][6][7][8].An efficient visible and UV Raman laser based on a barium nitrate Ba(NO 3 ) 2 (BNO) crystal with a pulse repetition rate of 1 kHz has been developed previously [3]. In this paper we describe a study of Raman lasers based on KGd(WO 4 ) 2 (KGW) crystals with a pump pulse repetition rate of 1 kHz and lasers based on BNO and KGW crystals operating at higher pulse repetition rates (4 kHz). The Raman lasers are pumped by the second harmonic of an acousto-optically Q-switched YAG:Nd laser (λ = 532 nm). Excitation both by gaussian and by quasi-Bessel beams is studied, and the output of a Raman laser with an unstable telescope cavity is examined. Lasing in the near IR based on a BNO crystal excited by the fundamental of the YAG:Nd laser (λ = 1064 nm) with a pulse repetition rate of 1 kHz is also studied.Experimental Setup. The optical layout of the experiment is shown in Fig. 1. A YAG:Nd laser (model LF2210, SOLAR TII, Minsk, Belarus) was used as the pump. It is flashlamp pumped and has an acousto-optical Q switch [3]. The laser generates nanosecond pulses at λ = 1064 and 532 nm with a repetition rate of 1-15 kHz. The maximum average output power for a 1 kHz repetition rate is 10 W at λ = 1064 nm and 7 W at λ = 532 nm. The laser beams are multimode with a relatively smooth intensity distribution over their transverse cross sections.BNO crystals with lengths of 6.5 cm and KGW crystals with lengths of 5 cm were used for the Raman conversion. These crystals have strong Raman-active vibrations and comparatively weak nonlinear refraction [9][10][11][12][13]. The ends of the crystals were antireflection coated at the pump wavelengths. They were mounted in a high-Q optical cavity formed by plane and (or) spherical mirrors with different reflectivities for the pump and SRS Stokes components. The input mirror for the pump radiation was highly transparent and the output mirror was highly reflective. This ensured two passes of the pump radiation through the scattering cry...

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Z-Scan studies of KYW, KYbW, KGW, and Ba(NO3)2 crystals

Cited by 29 publications

References 25 publications

Investigation On The Crystal Structure, Third-Order Nonlinear Optical And Thermal Studies Of 4-Nitroanilinium 5-Sulfosalicylic Acid Monohydrate Single Crystal

Investigation On The Crystal Structure, Third-Order Nonlinear Optical And Thermal Studies Of 4-Nitroanilinium 5-Sulfosalicylic Acid Monohydrate Single Crystal

Nonlinear refractive index of vanadate crystals in the near IR region

Kilohertz raman lasers based on bno and kgw crystals for a wide spectral range

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