Red, green, and blue laser light from a single Nd:YAl3(BO3)4 crystal based on laser oscillation at 1.3 μm

Jaque, Daniel; Capmany, J.; Solé, J. Garcı́a

doi:10.1063/1.124364

Cited by 121 publications

(47 citation statements)

References 8 publications

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“…The nonlinear optical properties of this material in connection with lasing properties led to the construction of numerous systems generating red, green and blue light by self-frequency doubling effect [5]. YAB can be obtained as nano crystallite powders by simple technological approaches [6,7].…”

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confidence: 99%

Optical second harmonic generation in Yttrium Aluminum Borate single crystals (theoretical simulation and experiment)

2008

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Experimental measurements of the second order susceptibilities for the second harmonic generation are reported for YAl 3 (BO 3 ) 4 (YAB) single crystals for the two principal tensor components xyz and yyy. First principle's calculation of the linear and nonlinear optical susceptibilities for Yttrium Aluminum Borate YAl 3 (BO 3 ) 4 (YAB) crystal have been carried out within a framework of the full-potential linear augmented plane wave (FP-LAPW) method. Our calculations show a large anisotropy of the linear and nonlinear optical susceptibilities. The observed dependences of the second order susceptibilities for the static frequency limit and for the frequency may be a consequence of different contribution of electron-phonon interactions. The imaginary parts of the second order SHG susceptibility , , , and are evaluated. We find that the 2ω inter-band and intra-band contributions to the real and imaginary parts of show opposite signs. The calculated second order susceptibilities are in reasonable good agreement with the experimental measurements.

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Section: +mentioning

confidence: 99%

Optical second harmonic generation in Yttrium Aluminum Borate single crystals (theoretical simulation and experiment)

2008

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“…2 It combines the good thermal, mechanical, and nonlinear properties of the YAB host with the outstanding fluorescence properties of Nd ions. 3,4 Based on this unique combination, multifrequency laser light oscillation in the three fundamental colors ͑red, green, and blue͒ has been demonstrated from a unique Nd:YAB element operating at 1.3 m. 5 In its simplest version, involving only the second harmonic ͑SH͒ of the 1064 nm laser line of Nd 3+ ions, pumpto-green optical conversion efficiencies as high as 25% have been reported. 6 Further incorporation of Nd:YAB SFC lasers in miniaturized optical devices requires the controlled fabrication of optical waveguides ͑WGs͒ in the bulk material.…”

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Self-frequency-doubling of ultrafast laser inscribed neodymium doped yttrium aluminum borate waveguides

Dong

Mendívil

Cantelar

et al. 2011

Applied Physics Letters

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Buried channel optical waveguides, supporting orthogonal polarizations, have been fabricated in a neodymium doped yttrium aluminum borate nonlinear laser crystal by ultrafast laser inscription following the so-called "double line" approach. Confocal fluorescence and second harmonic imaging experiments have revealed that the original fluorescence and nonlinear properties have been not deteriorated by the waveguide inscription procedure. Preliminary laser experiments have shown the ability of the fabricated structures for green laser light generation under 808 nm optical pumping by self-frequency-doubling of the 1.06 m laser line of neodymium ions. © 2011 American Institute of Physics. ͓doi:10.1063/1.3584852͔Among the multifunctional optical systems currently proposed as building-blocks of integrated devices, selffrequency-converted ͑SFC͒ laser crystals are one of the most widely studied. SFC systems are constituted by a nonlinear crystal which is optically activated by laser ions ͑usually rare earth ions such as Nd 3+ or Yb 3+ ͒. 1 Under laser operation the nonlinear properties of the host matrix activate frequencymixing processes between the different intracavity laser radiations that propagate along the gain medium ͑pump and laser͒. These intracavity nonlinear processes lead to the generation of new laser frequencies without the requirement of additional intracavity optical components, i.e., allowing for highly compact multiwavelength laser sources. 1 Among the different SFC crystals reported up to now, neodymium doped yttrium aluminum borate ͑hereafter Nd:YAB͒ is, without doubts, a paradigm. 2 It combines the good thermal, mechanical, and nonlinear properties of the YAB host with the outstanding fluorescence properties of Nd ions. 3,4 Based on this unique combination, multifrequency laser light oscillation in the three fundamental colors ͑red, green, and blue͒ has been demonstrated from a unique Nd:YAB element operating at 1.3 m. 5 In its simplest version, involving only the second harmonic ͑SH͒ of the 1064 nm laser line of Nd 3+ ions, pumpto-green optical conversion efficiencies as high as 25% have been reported. 6 Further incorporation of Nd:YAB SFC lasers in miniaturized optical devices requires the controlled fabrication of optical waveguides ͑WGs͒ in the bulk material. Up to now, WGs in Nd:YAB crystals have been only reported by light ion implantation, without demonstrating any selffrequency-doubling ͑SFD͒ laser ability. 7 In order to achieve this goal the fabricated structures should satisfy following three main requirements: ͑i͒ the fabrication procedure should preserve the original fluorescence and nonlinear properties of the Nd:YAB system, ͑ii͒ the fabricated WGs should support both TE and TM modes so that birefringence-based phase matching ͑PM, requiring orthogonal polarizations for fundamental and second harmonic waves͒ will be possible, and ͑iii͒ light confinement should be achieved in a large spectral range so that spatial confinement of both fundamental and second order radiation would be achieve...

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“…YAl 3 ͑BO 3 ͒ 4 crystal is a well-known laser host for Yb and Nd ions [8,9]. For Er-doped YAB, only crystal growth [10], some spectroscopic properties [11,12], and quasi-CW lasing with average output power of about 40 mW were reported in [13].…”

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Efficient 1 W continuous-wave diode-pumped Er,Yb:YAl_3(BO_3)_4 laser

et al. 2007

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We report the spectroscopy and high-power continuous-wave (CW) diode-pumped laser operation of Er: Yb: YAl 3 ͑BO 3 ͒ 4 crystal. Absorption and stimulated emission spectra, emission lifetimes, and efficiency of energy transfer from Yb 3+ level lifetime minimizes excited state absorption and upconversion losses, whereas the high luminescence quantum yield from the 4 I 13/2 level provides high laser efficiency. However, glasses suffer from low thermal and mechanical stability that limits the laser power to the level of a few hundred milliwatts due to the thermal lensing effects and optical damage of the active element. This is why the search for an efficient crystalline host for Er doping is of high interest.CW room-temperature 1. [7].YAl 3 ͑BO 3 ͒ 4 crystal is a well-known laser host for Yb and Nd ions [8,9]. For Er-doped YAB, only crystal growth [10], some spectroscopic properties [11,12], and quasi-CW lasing with average output power of about 40 mW were reported in [13]. In this Letter we report the spectroscopy and for the first time to our knowledge high-power CW laser operation of a diodepumped Er: Yb: YAl 3 ͑BO 3 ͒ 4 laser crystal.Er, Yb: YAB crystals with size of 8 mmϫ 8 mm ϫ 12 mm were obtained by dipping seeded hightemperature solution growth at a cooling rate of 0.2°C-5°C per day in the temperature range of 1060°C -1000°C using K 2 Mo 3 O 10 -based flux [14]. The concentrations of the dopants were measured by microprobe analysis to be 6 ϫ 10 20 cm −3 ͑11 at.% ͒ for Yb 3+ and 0.825ϫ 10 20 cm −3 ͑1.5 at.% ͒ for Er 3+ . The polarized absorption spectra of Er, Yb: YAB crystal measured in the 900-1050 nm range at room temperature are shown in Fig. 1. The spectral resolution was 0.4 nm. The Yb 2 F 7/2 → 2 F 5/2 absorption band in polarization is comparatively broad (17 nm FWHM) with a maximum absorption cross section of about 2.75ϫ 10 −20 cm 2 at 976 nm. In polarization it is considerably weaker (less than 0.3ϫ 10 −20 cm 2 ). Figure 2 shows the accurate absorption spectra of Er, Yb: YAB crystal at 1.45-1.65 m ( 4 I 15/2 → 4 I 13/2 transition of Er). In this spectral range the peaks of the -polarized spectrum are generally higher than those of the -polarized spectrum. The strongest peak with a cross section of 2.75ϫ 10 −20 cm 2 is located at 1531 nm.For lifetime measurements Er͑2 at.% ͒ : YAB crystal was excited by a Nd: YAG pulse-pumped optical parametric oscillator tuned to 976 nm. Excitation pulse duration was about 20 ns. The fluorescence decay was detected using a 0.3 m monochromator, pho- Fig. 1. Room-temperature polarized absorption spectra of Er, Yb: YAB crystal at 1 m.

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Red, green, and blue laser light from a single Nd:YAl3(BO3)4 crystal based on laser oscillation at 1.3 μm

Cited by 121 publications

References 8 publications

Optical second harmonic generation in Yttrium Aluminum Borate single crystals (theoretical simulation and experiment)

Optical second harmonic generation in Yttrium Aluminum Borate single crystals (theoretical simulation and experiment)

Self-frequency-doubling of ultrafast laser inscribed neodymium doped yttrium aluminum borate waveguides

Efficient 1 W continuous-wave diode-pumped Er,Yb:YAl_3(BO_3)_4 laser

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