Modes competition in a dual modes HeNe laser with optical feedback

Liu, Gang; Zhang, Shulian; Zhu, Jun; Li, Yan

doi:10.1016/j.optlastec.2005.10.004

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…Bouwmans discussed the dependencies between laser polarization and pump polarization in two limit cases [15] . It indicated that there was a complex competition between the gain anisotropy, loss anisotropy, and phase anisotropy [22] associated with the polarization pump, saturated absorption, and residual birefringence [23] , respectively. Through modes competition, radiation then occurs along preferred directions depending on dominant factors.…”

Section: Introductionmentioning

confidence: 99%

Self-polarization emission based on coherent combination of intracavity eigenmodes in Nd:YAG/Cr4+:YAG lasers

et al. 2021

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The behavior of self-polarization emission in Nd∶Y 3 Al 5 O 12 YAG=Cr 4 ∶YAG lasers has been proved in some cases. However, the degree and direction of polarization were often sensitive and unstable. We experimentally observed different beam profiles versus the angle of the polarizer relative to the polarization direction of the laser. In order to explore the polarization mechanism, the dynamics of intracavity polarized eigenmodes was analyzed theoretically. Simulative results were well consistent with our experimental observations. It indicated that the linear self-polarization emission was a composite state rather than an intrinsic state. This study contributed to the improvement of the polarization stability in Nd∶YAG=Cr 4 ∶YAG passively Q-switched lasers.

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Section: Introductionmentioning

confidence: 99%

Self-polarization emission based on coherent combination of intracavity eigenmodes in Nd:YAG/Cr4+:YAG lasers

et al. 2021

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“…When the beams, with two polarization directions, recombine after leaving the material, they are no longer in phase with one another and the polarization state has been changed [20,21]. Such depolarization reduces the laser performance and becomes a main limitation in realizing lasers with good beam quality and high power [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Analyses of different configurations for a multiple rod Nd:YAG system with a one-way travelling probe beam

You

Kan

Ogawa

et al. 2010

J. Opt.

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In this paper, the birefringence in an LD-side-pumped solid-state laser (LSPSSL) system is studied by using a quasi plane-wave probe beam. The effects on birefringence compensation have been investigated for different coupling systems arranged between two tandem-set rods. Both the aperture obstruction and the thermally induced lens effect have been taken into consideration in the theoretical explanation. It is shown that most birefringence can be successfully removed by using a suitable lens system as well as a quartz 90° rotator. In construction of a real resonator, such performances as the birefringence compensation, the extraction efficiency, and the high-order-mode control must be carefully balanced at the same time. Although the conclusions are based on analyses of a one-way travelling wave, the methodology introduced in this paper is thought to be useful for a stationary-wave design of the laser oscillator.

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“…Many new approaches and technical procedures have been proposed and implemented to reduce thermally induced effects for diode pumped solid state lasers (DPSSLs) since the early 1990s of the last century [1][2][3][4]. Among all thermal effects in a DPSSL, the thermally induced birefringence (TIB) is a knotty phenomenon in particular when the laser system suffers a high pump power [5][6][7]. The higher the pump power, the more is the waste heat deposited in the laser material and thus the severer is the TIB.…”

Section: Introductionmentioning

confidence: 99%

Aperture obstruction influences birefringence evaluation of a Nd : YAG laser system with tandem-set rods

Wang

Kan

Ogawa

et al. 2010

J. Phys. D: Appl. Phys.

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In this study, we derive a theoretical and experimental expression for evaluating the thermally induced birefringence (TIB) in a Nd : YAG laser system with double rods in tandem. The analytical solution determines the optimum oscillator geometry corresponding to the minimum depolarization loss while the so-called aperture obstruction is considered in the calculation model. It can be seen that the experimental results closely follow the theoretical evaluation for both the depolarized degree and the birefringent distribution of a probe beam. We also find that the traditional evaluation method, which neglects the thermally induced lens effect and aperture truncation during the optical design, leads to an obvious deviation in determining the optimum arrangement of a laser system for compensation of birefringence. The method presented in this paper is thought to be useful in analysing any high-powered oscillators or amplifiers with high pulse energy.

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Modes competition in a dual modes HeNe laser with optical feedback

Cited by 3 publications

References 22 publications

Self-polarization emission based on coherent combination of intracavity eigenmodes in Nd:YAG/Cr4+:YAG lasers

Self-polarization emission based on coherent combination of intracavity eigenmodes in Nd:YAG/Cr4+:YAG lasers

Analyses of different configurations for a multiple rod Nd:YAG system with a one-way travelling probe beam

Aperture obstruction influences birefringence evaluation of a Nd : YAG laser system with tandem-set rods

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