Abstract

A radially polarized beam was generated in a microchip Nd:YVO4 laser by shaping the pump profile to be a group of focused plane waves, the directions of which are located on a conical surface. The oblique incident pump beam induces thermal lensing combined with birefringence to distinguish the radial ray from the azimuthal ray to achieve radial polarization. The average contrast ratio was 23.6 when the pump power was between 3.06 and 4.27 W.

© 2013 Optical Society of America

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T. Moser, M. A. Ahmed, F. Pigeon, O. Parriaux, E. Wyss, and Th. Graf, Laser Phys. Lett. 1, 234 (2004).
[CrossRef]

Pigeon, F.

T. Moser, M. A. Ahmed, F. Pigeon, O. Parriaux, E. Wyss, and Th. Graf, Laser Phys. Lett. 1, 234 (2004).
[CrossRef]

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D. Pohl, Appl. Phys. Lett. 20, 266 (1972).
[CrossRef]

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Z. Xiong, Z. G. Li, N. Moore, W. L. Huang, and G. C. Lim, IEEE J. Quantum Electron. 39, 979 (2003).
[CrossRef]

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Adv. Opt. Photon.

Appl. Opt.

Appl. Phys. Lett.

D. Pohl, Appl. Phys. Lett. 20, 266 (1972).
[CrossRef]

IEEE J. Quantum Electron.

Z. Xiong, Z. G. Li, N. Moore, W. L. Huang, and G. C. Lim, IEEE J. Quantum Electron. 39, 979 (2003).
[CrossRef]

Jpn. J. Appl. Phys.

Y. Asakawa, R. Kawai, K. Ohki, and K. Otsuka, Jpn. J. Appl. Phys. 38, L515 (1999).
[CrossRef]

Laser Phys. Lett.

T. Moser, M. A. Ahmed, F. Pigeon, O. Parriaux, E. Wyss, and Th. Graf, Laser Phys. Lett. 1, 234 (2004).
[CrossRef]

Opt. Commun.

M.-D. Wei, W.-L. Shiao, and Y.-T. Lin, Opt. Commun. 248, 7 (2005).
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Opt. Express

Opt. Lett.

Proc. IEEE

Y. Mushiake, K. Matzumurra, and N. Nakajima, Proc. IEEE 60, 1107 (1972).
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

(a) Experimental setup, (b) thermal-induced optical path difference considering a Gaussian pump profile (blue dashed line), and (c) the focal length and spot size as a function of pump power.

Fig. 2.
Fig. 2.

Transverse patterns at the various polarizer angles. Red arrows represent the angle of the polarizer, and “N” notes the pattern without adding polarizer.

Fig. 3.
Fig. 3.

(a) Sketched diagram for the overlapping region in Mach–Zehnder interferometer, (b) interference pattern, and (c) enlarged pattern of the red region in (b).

Fig. 4.
Fig. 4.

Polarization direction versus the slit angle. Each data point was obtained from fitting the intensity as a function of the polarizer angle, such as shown in the inset figure, with the slit angle of 60°.

Fig. 5.
Fig. 5.

Output power and polarization contrast ratio versus the pump power.

Equations (2)

Equations on this page are rendered with MathJax. Learn more.

OPD=0L(dn/dT)T(r,z)dz+nrΔu(r),
1/ft(ηP/πw2k)[(dn/dT)+α(n1)],

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