Chromium-doped LiCAF laser passively Q switched with a V^3+:YAG crystal

Jabczyński, Jan Karol; Żendzian, Waldemar; Mierczyk, Zygmunt; Frukacz, Z.

doi:10.1364/ao.40.006638

Cited by 23 publications

(16 citation statements)

References 30 publications

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“…The duration of the ultrashort pulses was in the subnanosecond range from 0.1 to 1.2 nsec [74,100,113,175,201,207,221,[253][254][255][256].…”

Section: Mode Synchronization Of Solid-state Lasersmentioning

confidence: 99%

“…The ability to generate in this mode for V 3+ :Y 3 Al 5 O 12 was explained [175,221] by the relatively fast bleaching relaxation time for this crystal (5-37 nsec, Table 3) in combination with the use of long laser cavities with residence times of their radiation exceeding the restoration time of the initial absorption of V 3+ :Y 3 Al 5 O 12 (T cav > τ). Owing to this, pulses of duration 0.8-1.0 nsec with energy up to 1 mJ could be obtained in Pr 3+ :YAlO 3 and Ti 3+ :Al 2 O 3 lasers using V 3+ :Y 3 Al 5 O 12 as a result of passive mode synchronization [113].…”

Section: Mode Synchronization Of Solid-state Lasersmentioning

confidence: 99%

“…Pulses of duration 300-500 psec and energy 1 mJ were obtained in Nd lasers with lamp pumping [1.07-μm Nd 3+ :KGd(WO 4 ) 2 and 1. 34 [175,221]. A succession of wavetrains of ultrashort pulses was generated in a four-mirror Z-shaped cavity.…”

Section: Mode Synchronization Of Solid-state Lasersmentioning

confidence: 99%

“…Pulses of duration 70 nsec with energy 20 mJ at λ = 0.75 μm were obtained in crystal[15,113]. Pulses of duration 50 nsec and energy 1 mJ were obtained in a Cr 3+ :LiCaAlF 6 laser (λ gen = 0.78 μm)[15], 100 nsec and 5 mJ (Pr 3+ :YAlO 3 , λ gen = 0.747 μm), and 500 nsec and 3 mJ…”

mentioning

confidence: 99%

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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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“…The duration of the ultrashort pulses was in the subnanosecond range from 0.1 to 1.2 nsec [74,100,113,175,201,207,221,[253][254][255][256].…”

Section: Mode Synchronization Of Solid-state Lasersmentioning

confidence: 99%

Section: Mode Synchronization Of Solid-state Lasersmentioning

confidence: 99%

Section: Mode Synchronization Of Solid-state Lasersmentioning

confidence: 99%

mentioning

confidence: 99%

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

Malyarevich

Yumashev

2009

J Appl Spectrosc

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“…Among Cr:colquiriites, Cr:LiCAF has the highest thermal conductivity and maximum thermal quenching temperature combined with minimum quantum defect, excited-state absorption and upconversion rate [12,16,17]. Despite these facts, earlier studies with Cr:colquiriites mostly focused on Cr:LiSAF due to its broader gain bandwidth, slightly higher gain and availability of high-quality crystals with low passive losses in the order of 0.2% cm −1 .…”

Section: Introductionmentioning

confidence: 99%

Diode-pumped continuous-wave and femtosecond Cr:LiCAF lasers with high average power in the near infrared, visible and near ultraviolet

Demırbas¹,

Baali²,

Acar³

et al. 2015

Opt. Express

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Abstract:We demonstrate continuous-wave (cw), cw frequency-doubled, cw mode-locked and Q-switched mode-locked operation of multimode diode-pumped Cr:LiCAF lasers with record average powers. Up to 2.54 W of cw output is obtained around 805 nm at an absorbed pump power of 5.5 W. Using intracavity frequency doubling with a BBO crystal, 0.9 W are generated around 402 nm, corresponding to an optical-to-optical conversion efficiency of 12%. With an intracavity birefringent tuning plate, the fundamental and frequency-doubled laser output is tuned continuously in a broad wavelength range from 745 nm to 885 nm and from 375 to 440 nm, respectively. A saturable Bragg reflector is used to initiate and sustain mode locking. In the cw mode-locked regime, the Cr:LiCAF laser produces 105-fs long pulses near 810 nm with an average power of 0.75 W. The repetition rate is 96.4 MHz, resulting in pulse energies of 7.7 nJ and peak powers of 65 kW. In Q-switched mode-locked operation, pulses with energies above 150 nJ are generated.

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Nd:YAG/V:YAG microchip laser operating at 1338 nm

et al. 2005

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Q-switched microchip laser emitting radiation at wavelength 1338 nm was designed and constructed. This laser was based on a monolith crystal which combines in one piece a cooling undoped part (undoped YAG crystal), an active laser part (Nd 3+ :YAG), and a saturable absorber (V 3+ :YAG, T 0 = 85%). The microchip resonator consists of dielectric mirrors directly deposited on the monolith surfaces. The output coupler with reflection 90% was placed on the V 3+ -doped part. Q-switched microchip laser was tested under pulsed, and CW diode pumping. The pulse length was the same for all regimes and it equals to 6.2 ns. The wavelength of linearly polarized laser emission was 1338 nm. For pulsed pumping the output pulse energy was stable up to mean pump power 1 W and it was equal to 131 µJ, which corresponds to peak power 21 kW. In CW regime for pumping up to 14 W the pulse energy was 37 µJ.

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Chromium-doped LiCAF laser passively Q switched with a V^3+:YAG crystal

Cited by 23 publications

References 30 publications

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

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

Diode-pumped continuous-wave and femtosecond Cr:LiCAF lasers with high average power in the near infrared, visible and near ultraviolet

Nd:YAG/V:YAG microchip laser operating at 1338 nm

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