Investigation of the misalignment sensitivity of a birefringence-compensated two-rod Nd:YAG laser system

Kugler, Nicolas; Dong, Shalei; Lu, Qiaoyin; Weber, Horst

doi:10.1364/ao.36.009359

Cited by 34 publications

(9 citation statements)

References 12 publications

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“…Finally, P G reaches a quasi-asymptotic behavior for high pumping power, which implies that depolarization is not complete. The same conclusion was also obtained by other authors studying a similar system [105].…”

Section: Generalized Degree Of Polarization Of Beams Emerging From Ansupporting

confidence: 89%

Parametric characterization of the spatial structure of non-uniformly polarized laser beams

Mejı́as

Martı́nez-Herrero

Piquero

et al. 2002

Progress in Quantum Electronics

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We present an approach for describing the spatial structure of partially polarized light fields. Unlike the treatments usually encountered in the literature, in which the polarization state is represented by position-dependent functions, the formalism shown here characterizes the polarization by means of a family of measurable overall parameters averaged over the transverse spatial region where the beam intensity reaches significant values. Generalized degrees of polarization are introduced to evaluate the uniformity of the spatial distribution of the polarization state of the beam-like field. The possibility of improvement and optimization of the quality of a polarized laser beam (understood as the general usefulness of such field for collimation and focussing) is analyzed by employing first-order optical systems. Finally, attention is briefly devoted to non-paraxial electromagnetic vector beams, whose parametric description of their polarization properties constitutes, at present, a challenge for theoreticians.

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Section: Generalized Degree Of Polarization Of Beams Emerging From Ansupporting

confidence: 89%

Parametric characterization of the spatial structure of non-uniformly polarized laser beams

Mejı́as

Martı́nez-Herrero

Piquero

et al. 2002

Progress in Quantum Electronics

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“…For AlN the acquired bore-hole is more constant in diameter, the maximum drilling depth reaches 15.8 mm at an aspect ratio of 1:175. Influence of beam quality To determine the influence of laser beam quality in high aspect laser micro drilling, comparative drilling studies into AlN and Al 2 O 3 using a non-commercial 100 W double-rod Nd:YAG laser system (LMTB) [6] and [7]in multimode configuration were conducted. The MOPA-system achieves significant deeper and leaner holes at identical laser parameters, except for the difference in beam quality, which lies one order of magnitude apart (MOPA: M² = 2.3; double-rod: M² = 20.5).…”

Section: Proc Of Spie Vol 4977 299mentioning

confidence: 99%

High-quality laser microdrilling of metals and ceramics with maximum aspect ratio

et al. 2003

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To meet the industry's demand for reducing machine cycle lengths concerning laser-drilling a Nd:YAG MasterOscillator Power-Amplifier (MOPA)-system was developed at the LMTB-laboratories that emits high-power peakpulses at excellent beam-quality. Presently, the output power of the oscillator (10W@1064nm) with a beam-quality of M²=1.3 is amplified to 95W@1064nm with M²=2.3 and a single pulse energy up to 500mJ. The pulse duration can be varied between 26 and 230ns. On account of the excellent beam quality, frequency conversion resulted in 49W@532nm and 4.8@266nm. The MOPA-System is used for laser micro drilling experiments into metals and ceramics where the influence of the beam quality on the geometrical shape of the hole is investigated and compared with applications conducted with similar laser systems. Additionally means in optimizing the drilling process such as burr-minimizing and melt-reduction were introduced. Furthermore, experiments using tapered drilling technique are undertaken. A maximum aspect ratio of 1:200 in stainless steel was obtained.

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“…Since the calculation of thermal lensing in the beam splitter has difficulty of axi-asymmetric temperature distribution, we took this effect into the simulation by assuming different thermal lensing between both arms. No compensative technique for wave-front distortion [19,20,21] was considered in this calculation. Figure 3 shows the results of the shot noise sensitivity calculated by using the FFT simulation.…”

Section: Thermal Lensing In Interferometermentioning

confidence: 99%

Thermal lensing in cryogenic sapphire substrates

Tomaru¹,

Suzuki²,

Miyoki³

et al. 2002

Class. Quantum Grav.

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We report the reduction of the thermal lensing in cryogenic sapphire mirrors, which is planed to be used in the Large scale Cryogenic Gravitational wave Telescope (LCGT) project. We measured three key parameters of sapphire substrate for thermal lensing at cryogenic temperature. They are optical absorption coefficient, thermal conductivity and temperature coefficient of refractive index at cryogenic temperature. On basis of these measurements, we estimated the shot noise sensitivity of the interferometer with thermal lensing by using a wave-front tracing simulation. We found that thermal lensing in cryogenic sapphire mirrors is negligible.

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Investigation of the misalignment sensitivity of a birefringence-compensated two-rod Nd:YAG laser system

Cited by 34 publications

References 12 publications

Parametric characterization of the spatial structure of non-uniformly polarized laser beams

Parametric characterization of the spatial structure of non-uniformly polarized laser beams

High-quality laser microdrilling of metals and ceramics with maximum aspect ratio

Thermal lensing in cryogenic sapphire substrates

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