Efficient diode-pumped passively <i>Q</i>-switched laser operation around 1.9 μm and self-frequency Raman conversion of Tm-doped KY(WO4)2

Batay, L.E.; Kuzmin, A.; Grabtchikov, A. S.; Lisinetskii, V. A.; Orlovich, V. A.; Demidovich, Alexander; Титов, А. Н.; Badikov, V. V.; Sheina, Svetlana; Panyutin, Vladimir; Mond, M.; Kück, S.

doi:10.1063/1.1514393

Cited by 71 publications

(41 citation statements)

References 9 publications

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“…It is the first time Tm-generation is obtained for in a monoclinic double tungstate. In all previous works [14], [15], [21], [22], the active elements were cut along the -axis. The increased thresholds and the lower output powers indicate smaller gain cross section in the case as compared to as could be expected from spectroscopic studies [19].…”

Section: Resultsmentioning

confidence: 99%

“…2) was used in the present work in contrast to previous studies with Tm:KYW which relied on simple two-mirror resonators [14], [15], [21]- [22]. It allows easy insertion of tuning elements and also extension with mode-locking devices.…”

Section: Experimental Setup and Sample Parametersmentioning

confidence: 99%

“…Codoping of Tm:KYW with Yb for InGaAs diode pumping at 980 nm with subsequent excitation transfer was studied in [16] but laser experiments revealed no practical advantages as compared to direct 800 nm pumping by AlGaAs diodes [21]. Passive -switching and Raman self-conversion to 2365 nm has also been demonstrated in such lasers [22]. The Tm ion in KYW or in KYb Y Tm (WO ) can be excited also at 1064 nm by a Nd:YAG laser through a photon avalanche process [23], [24] as previously realized in Tm:YAG.…”

Section: Introductionmentioning

confidence: 99%

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Efficient tunable laser operation of Tm:KGd(WO/sub 4/)/sub 2/ in the continuous-wave regime at room temperature

Petrov

Güell

Massons

et al. 2004

IEEE J. Quantum Electron.

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Abstract-Tm:KGd(WO 4 ) 2 is studied as a three-level laser on the 3 F 4 3 H 6 transition and a tunable source in the 2-m spectral range, operating at room temperature. An overall tunability extending from 1790 to 2042 nm is achieved with maximum output powers of 400 mW for an absorbed pump power of 1 W. Various doping levels, pump wavelengths and polarization configurations are compared and the advantages of the monoclinic double tungstates over other Tm-hosts are outlined.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Setup and Sample Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficient tunable laser operation of Tm:KGd(WO/sub 4/)/sub 2/ in the continuous-wave regime at room temperature

Petrov

Güell

Massons

et al. 2004

IEEE J. Quantum Electron.

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“…Efficient diode-and laser-pumped cw bulk [15][16][17], waveguide [13,18] and thindisc [19,20] Tm:KREW lasers were recently demonstrated. Tm-doped double tungstates were also utilized in laser systems with Q-switched [21][22][23] and mode-locked [24][25][26] operation modes. The power scaling capabilities for these materials are restricted by moderate value of thermal conductivity [27] and profound anisotropy of physical properties [28] which lead to complicated thermo-optic distortions pattern.…”

mentioning

confidence: 99%

Thermal lensing and microchip laser performance of N g-cut Tm3+:KY(WO4)2 crystal

et al. 2012

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The thermal lensing effect was characterized in the diode-pumped monoclinic N g -cut Tm:KYW crystal under laser operation conditions at the wavelength of 1.94 µm. The thermal lens was found to be slightly astigmatic; its optical power D being positive for rays lying in all meridional planes. Thermal lens sensitivity factors M = dD/dP abs equal 11.8 m −1 /W and 8.8 m −1 /W (with respect to the absorbed pump power P abs ) for principal meridional planes containing N p and N m axes. Nearly athermal behavior of N g -cut crystal is associated with the mutual compensation of different impacts to the thermal lens optical power that arise from temperature dependence of the refractive index dn/dT and anisotropic thermal expansion. It was utilized to produce passively cooled diode-pumped 0.65 W cw Tm:KYW microchip laser with slope efficiency of 44 % and low thermo-optic aberrations.

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“…The average emission power was 0.9 W with pumping power 16 W. The M 2 -factor of the beam was 1.9 [250]. Perhaps the currently most popular PS among those mentioned for Er lasers in the spectral region 1. :KY(WO 4 ) 2 lasers with diode pumping [129,134,251]. Shorter emission pulses (63 nsec with energy 6.7 μJ) were obtained with PS based on Cr 2+ :ZnS in a Yb 3+ ,Tm 3+ :KY(WO 4 ) 2 laser [129].…”

Section: Ermentioning

confidence: 99%

Saturable absorbers based on tetrahedrally coordinated transition-metal ions in crystals (Review)

Malyarevich

Yumashev

2009

J Appl Spectrosc

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Published data on spectroscopic characteristics of saturable absorbers based on crystals doped with tetrahedrally coordinated transition-metal ions (Cr 2+ , Cr 4+ , Cr 5+ , V 3+ , Cr 2+ , Fe 2+ ) in addition to their use as passive Q-switches for solid-state lasers emitting in the visible and near-infrared regions are reviewed.Introduction. The use of saturable absorbers (SA) as passive Q-switches (PS) in solid-state lasers is an effective method for generating nanosecond and subnanosecond light pulses. This method differs favorably from active control of laser cavity gain by the lack of mechanical perturbations of the optical devices, additional sources of power supply, and external electrical control circuits. This simplifies the construction and operation of the laser and reduces its cost. Compact solid-state mini-lasers and ultra-small lasers (so-called microchip lasers) can be fabricated if PS are used.A SA is an optical material for which the transmission increases with increasing power density of the incident radiation. The SA should satisfy several requirements in order to be used as a PS. First of all this applies to SA characteristics at the laser operating wavelength such as absorption saturation energy density, coefficient of residual absorption in the fully bleached state, bleaching rise and fall time, and optical destruction threshold. The requirements for their absolute values depend on the spectroscopic properties of the lasing medium (LM) and the laser cavity parameters.In most instances with certain exceptions, SA based on tetrahedrally coordinated (TC) transition-metal ions of the iron group have bleaching relaxation times that are longer than the generation time of the laser pulses obtained using them. Such SA are usually called slowly relaxing. Relaxation processes leading to a restoration of their initial absorption can be ignored in analyzing their operation in a laser. In the simplest instance (if a four-level diagram is used for the spectroscopic model of the SA), the criterion for SA functioning as a PS is written [1-8]:

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Efficient diode-pumped passively Q-switched laser operation around 1.9 μm and self-frequency Raman conversion of Tm-doped KY(WO4)2

Cited by 71 publications

References 9 publications

Efficient tunable laser operation of Tm:KGd(WO/sub 4/)/sub 2/ in the continuous-wave regime at room temperature

Efficient tunable laser operation of Tm:KGd(WO/sub 4/)/sub 2/ in the continuous-wave regime at room temperature

Thermal lensing and microchip laser performance of N g-cut Tm3+:KY(WO4)2 crystal

Saturable absorbers based on tetrahedrally coordinated transition-metal ions in crystals (Review)

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