Efficient Er:YAG Laser Operating at 1645 and 1617 nm

Spariosu, Kalin; Leyva, Víctor; Reeder, R. A.; Klotz, Michaela

doi:10.1109/jqe.2005.861828

Cited by 38 publications

(21 citation statements)

References 6 publications

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“…These numbers are in good agreement with recent spectroscopic results reported for single-crystal Er:YAG (0.5 at.%) [9,10]. It was noticed, however, that the absorption cross-section data reported in the literature vary slightly for single-crystal Er:YAG depending on the Er concentration and spectral resolution employed in the absorption measurements [1][2][3][4][5][6][7][8][9][10].…”

Section: Polycrystalline Ceramic Er:yagsupporting

confidence: 91%

“…Significant advances were recently reported in the development of ∼1.6 m Er 3+ lasers (e.g. Er:YAG), which are resonantly pumped between Stark levels of the 4 I 15/2 ↔ 4 I 13/2 transition [4][5][6][7][8][9][10]. The interest in resonantly pumped Er 3+ lasers has been stimulated by the availability of new long-wavelength pump sources including Er 3+ fiber lasers and ∼1.5 m diode-laser arrays.…”

Section: Introductionmentioning

confidence: 99%

“…The emission quantum efficiency of the 1.5 m emission was determined to be only ∼26.4% for highly doped Er:YAG ceramics, which was attributed to upconversion and cross-relaxation processes [16]. For quasi-three level laser operation of the 4 I 13/2 ↔ 4 I 15/2 transition it is important to keep the Er 3+ concentration low (1 at.% or less) in order to minimize re-absorption losses at the laser wavelength and to reduce upconversion losses that depopulate the pump and upper laser levels [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic studies of the 1.5μm (4I15/2→4I13/2) emission from polycrystalline ceramic Er:YAG and Er:KPb2Cl5

Hömmerich¹,

Hanley²,

Brown³

et al. 2009

Journal of Alloys and Compounds

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Section: Polycrystalline Ceramic Er:yagsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spectroscopic studies of the 1.5μm (4I15/2→4I13/2) emission from polycrystalline ceramic Er:YAG and Er:KPb2Cl5

Hömmerich¹,

Hanley²,

Brown³

et al. 2009

Journal of Alloys and Compounds

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“…One of the most promising eye-safe lasers, 1645 nm hybrid fiber-bulk erbium lasers, has been proven to be effective in achieving high output power and good beam quality [3][4][5][6][7]. The best results were reported to be a 60 W output with a slope efficiency of 80% for a continuous-wave (CW) operation [5] and 30 mJ pulses with a pulse width less than 20 ns at 20 Hz PRF for a Qswitched operation [7].…”

Section: Introductionmentioning

confidence: 99%

“…The optical-optical and slope efficiencies are much lower than the quantum efficiency (~90%). The strong thermal effect in Er:YAG crystals is explained as a result of ETU [3,5,6,15], which is quadratic in the upper laser level population. Therefore, Er:YAG crystals with low Er 3+ doping concentration are required.…”

Section: Introductionmentioning

confidence: 99%

Efficient 1645 nm continuous-wave and Q‑switched Er:YAG laser pumped by 1532 nm narrow-band laser diode

et al. 2011

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Abstract:Energy transfer upconversion induced thermal effects are mainly responsible for the low efficiency of laser diode pumped Er:YAG lasers. The current work adopts Er:YAG rods with 0.25% Er 3+ doping concentration, instead of the commonly used rods with 0.5% Er 3+ doping concentration. Results show that the thermal effect is greatly alleviated. A continuous-wave output of 10.2 W is obtained using 31 W incident pump power. Optical-optical efficiency is approximately 33%. Slope efficiency, with respect to the absorbed pump power, is as high as 83%, which is close to the quantum efficiency. In a Q-switched operation, 7 mJ pulses with a pulse width of ~65 ns are obtained at 100 Hz PRF.

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Lasers

Photonics

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The LASER light source, whose name is based on "Light Amplification by Stimulated Emission of Radiation", is the most important device in almost all photonic applications. First built in 1960 [6.1-6.5] it allows the generation of light with properties not available from natural light sources. Modern commercially available laser systems allow output powers of up to 10 20 W for short times with good beam quality and of several kW in continuos operation, usually with less good beam quality. Very short pulses with durations smaller than 5 · 10 −15 s, wavelengths from a few nm in the XUV to the far IR with several 10 µm, pulse energies of up to 10 4 J and frequency stability's and resolutions of better 10 −13 can be generated. The laser prices range from $ 1 to many millions of dollars and their size from less than a cubic mm to the dimensions of large buildings.The good coherence and beam quality of laser light in combination with high powers and short pulses are the basis for many nonlinear interactions, but the laser is a highly nonlinear optical device itself, using nonlinear properties of materials as described in the previous chapters. Therefore, the fundamental laws treated in Chap. 2 for the description of light as well as the description of linear and nonlinear interactions of light with matter in Chaps. 3, 4 and 5 are the basis for the analysis of laser operation and its light properties. Therefore, the theoretical description of laser devices represents an application of these laws and can be presented in this chapter in a compact form. For details the related sections of the previous chapters should be consulted. The different lasers and their constructions, as well as the resulting relevant light and operation parameters, are described and the consequences for photonic applications are discussed. Finally, possible classifications are given and safety aspects are mentioned. For further reading see [M6, M16, M17, M23-M25, M27, M28, M30, M33, M43, M44, M49, M50, M58-M65].

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Efficient Er:YAG Laser Operating at 1645 and 1617 nm

Cited by 38 publications

References 6 publications

Spectroscopic studies of the 1.5μm (4I15/2→4I13/2) emission from polycrystalline ceramic Er:YAG and Er:KPb2Cl5

Spectroscopic studies of the 1.5μm (4I15/2→4I13/2) emission from polycrystalline ceramic Er:YAG and Er:KPb2Cl5

Efficient 1645 nm continuous-wave and Q‑switched Er:YAG laser pumped by 1532 nm narrow-band laser diode

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