Conical refraction Nd:KGd(WO4)2 laser.

In 1832 Hamilton predicted conical refraction, concluding that if a beam propagates along an optic axis of a biaxial crystal, a hollow cone of light will emerge. Nearly two centuries on, cascade conical refraction involving multiple crystals has not been investigated. We empirically investigate a unique two-crystal configuration, and use this to demonstrate an ultra-efficient conical refraction Nd:KGd(WO(4))(2) laser providing multi-watt output with excellent beam quality independent of resonator design with a slope efficiency close to the theoretical maximum, offering a new route for power and brightness-scaling in solid-state bulk lasers.

[1]  M. V. Berry,et al.  Chapter 2 Conical diffraction: Hamilton's diabolical point at the heart of crystal optics , 2007 .

[2]  C. Raman,et al.  Optical Images Formed by Conical Refraction , 1942, Nature.

[3]  E. Burstein,et al.  Effect of Optical Activity or Faraday Rotation on Internal Conical Refraction , 1972 .

[4]  N. Bloembergen,et al.  Conical refraction in nonlinear optics , 1969 .

[5]  Maria A. Bursukova,et al.  Conical refraction: an experimental introduction , 2008, SPIE Photonics Europe.

[6]  M. Berry,et al.  Institute of Physics Publishing Journal of Optics A: Pure and Applied Optics Optimal Configurations for Imaging Polarimeters: Impact of Image Noise and Systematic Errors , 2006 .

[7]  Solid-state conical refraction laser , 2009, 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference.

[8]  Poggendorff.  Ueber die konische Refraction , 1839 .

[9]  M. Berry,et al.  Chiral conical diffraction , 2006 .

[10]  A. Belafhal.  Theoretical intensity distribution of internal conical refraction , 2000 .

[11]  M. Berry.  Conical diffraction asymptotics: fine structure of Poggendorff rings and axial spike , 2004 .

[12]  C. Raman,et al.  Conical Refraction in Naphthalene Crystals , 1941, Nature.

[13]  Valdas Pasiskevicius,et al.  Polarization-tunable Yb:KGW laser based on internal conical refraction. , 2007, Optics letters.

[14]  M. Stepanov,et al.  Internal conical refraction of coherent light beams , 1999 .

[15]  M. Jeffrey.  The spun cusp complexified: complex ray focusing in chiral conical diffraction , 2007 .

[16]  S. M. Black,et al.  Institute of Physics Publishing Journal of Optics A: Pure and Applied Optics Online Pattern Recognition in Noisy Background by Means of Wavelet Coefficients Thresholding , 2005 .

[17]  J. Donegan,et al.  Conical diffraction and Bessel beam formation with a high optical quality biaxial crystal. , 2009, Optics express.

[18]  M. Stepanov,et al.  Internal conical refraction of light beams in biaxial gyrotropic crystals , 2002 .

[19]  M. Berry,et al.  Conical diffraction: observations and theory , 2006, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[20]  Michael V Berry,et al.  Conical diffraction asymptotics: fine structure of Poggendorff rings and axial spike , 2004 .

[21]  B. Boulanger,et al.  Experimental study of internal and external conical refractions in KTP , 1994 .