A novel approach for compensation of birefringence in cylindrical Nd: YAG rods

Lu, Qiaoyin; Kugler, Nicolas; Weber, Horst; Dong, Shalei; Müller, Norbert; Wittrock, Ulrich

doi:10.1007/bf00578551

Cited by 126 publications

(17 citation statements)

References 25 publications

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“…they have the same thermal lenses with focal length f th , the theoretical analyses by using the matrix optics method shows that the two rods and the imaging system between them are optically equivalent to a thin lens with focal length f th /2. [12] The reason why we have selectively used a flat-concave cavity instead of a flat-flat cavity is that the flat-concave resonator can keep stable under higher pump power. That is, with a pump power of 13 kW, the resonator shown in Fig.…”

Section: Results Of Flat-concave Resonatormentioning

confidence: 99%

“…However, it has been shown that thermal birefringence can be eliminated in a setup comprising two identically pumped laser rods, a telescope and a 90 • polarization rotator. [12] This scheme is now frequently employed, [13−15] and we therefore assume in our simulation that the active medium is free of birefringence. The remaining aberrations of the thermal lens are caused by unavoidable inhomogeneities of the optical pumping in the laser crystal, the temperaturedependence of the thermal conductivity K and the dn/dT , and numerous other effects that lead to a nonparabolic temperature profile in the laser rod.…”

Section: Principle Of Simulationmentioning

confidence: 99%

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Influence of spherical aberrations on fundamental mode beam quality under different laser resonators

Zhang

Miao²,

et al. 2009

Chinese Phys. B

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Section: Results Of Flat-concave Resonatormentioning

confidence: 99%

Section: Principle Of Simulationmentioning

confidence: 99%

Influence of spherical aberrations on fundamental mode beam quality under different laser resonators

Zhang

Miao²,

et al. 2009

Chinese Phys. B

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“…Therefore, when the linear polarized beam traverses the gain medium, the tangential and radial components could experience different phase retardation, resulting in significant depolarization [15]. The compensation of birefringence is a significant issue for the Nd:YAG rod side-pumped amplifier [16][17][18][19].…”

Section: Side-pumped Amplifiermentioning

confidence: 99%

Compact 50 W All-Solid-State Picosecond Laser System at 1 kHz

et al. 2020

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Compact, stable, high-power and high repetition rate picosecond laser systems are excellent sources for optical parametric chirped pulse amplification systems and laser satellite ranging systems. Compared with the traditional complex high-power amplifier, this article reports a compact high-power picosecond laser system at a repetition rate of 1 kHz based on Nd:YAG bulk crystal. The thermal lens effect limits the regenerative amplifier to directly output higher energy. For this reason, multi-stage traveling-wave amplifiers are usually used to gradually increase the laser pulse energy. So as to achieve a compact structure, a regenerative amplifier that can output higher power at 1 kHz is designed in the laser system. The regenerative amplifier can output the power of 6.5 W at the pump power of 41.5 W; the beam quality of M2 factor was about 1.3. A more flexible thermal depolarization compensation structure is applied in the side-pumped amplifier, which can effectively compensate for thermal lens effect and thermal depolarization at different pump powers. Finally, the laser pulse can achieve an output power higher than 50 W at 1 kHz after passing through an end-pumped traveling-wave amplifier and a side-pumped traveling wave amplifier.

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“…According to Reference [9], thermally induced depolarization will be compensated when laser pulses pass through the same gain module with a 90-degree polarization rotation. Thus, a Faraday rotator is placed between the gain module and HR1 to achieve the polarization rotation and depolarization compensation.…”

Section: Power Amplifiers and Compensation Of Thermal Effectsmentioning

confidence: 99%

A High-Energy, 100 Hz, Picosecond Laser for OPCPA Pumping

Peng

Chen

et al. 2017

Applied Sciences

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Abstract:A high-energy diode-pumped picosecond laser system centered at 1064 nm for optical parametric chirped pulse amplifier (OPCPA) pumping was demonstrated. The laser system was based on a master oscillator power amplifier configuration, which contained an Nd:YVO 4 mode-locked seed laser, an LD-pumped Nd:YAG regenerative amplifier, and two double-pass amplifiers. A reflecting volume Bragg grating with a 0.1 nm reflective bandwidth was used in the regenerative amplifier for spectrum narrowing and pulse broadening to suit the pulse duration of the optical parametric amplifier (OPA) process. Laser pulses with an energy of 316.5 mJ and a pulse duration of 50 ps were obtained at a 100 Hz repetition rate. A top-hat beam distribution and a 0.53% energy stability (RMS) were achieved in this system.

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A novel approach for compensation of birefringence in cylindrical Nd: YAG rods

Cited by 126 publications

References 25 publications

Influence of spherical aberrations on fundamental mode beam quality under different laser resonators

Influence of spherical aberrations on fundamental mode beam quality under different laser resonators

Compact 50 W All-Solid-State Picosecond Laser System at 1 kHz

A High-Energy, 100 Hz, Picosecond Laser for OPCPA Pumping

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