Femtosecond-laser micromachined optical waveguides in Bi4Ge3O12 crystals.

The optical waveguides in Bi(4)Ge(3)O(12) (BGO) crystals in both depressed-cladding and dual-line configurations have been produced using femtosecond-laser micromachining. The guiding properties and thermal stabilities of the BGO waveguides have been investigated for both geometries, showing different performance of the fabricated structures. Both depressed-cladding and dual-line waveguides support guidance along both TE and TM polarizations. Thermal annealing treatments up to 600°C reduce the propagation loss of dual-line waveguides to as low as 0.5 dB/cm, while the cladding waveguide is only stable under thermal treatment not higher than 260°C, reaching a propagation loss of 2.1 dB/cm.

[1]  Feng Chen,et al.  Channel waveguide lasers in Nd:GGG crystals fabricated by femtosecond laser inscription. , 2011, Optics express.

[2]  J. J. Witcher,et al.  Direct femtosecond laser waveguide writing inside zinc phosphate glass. , 2011, Optics express.

[3]  E Audouard,et al.  Ultrafast laser writing of homogeneous longitudinal waveguides in glasses using dynamic wavefront correction. , 2008, Optics express.

[4]  A. Ródenas,et al.  High-contrast step-index waveguides in borate nonlinear laser crystals by 3D laser writing. , 2011, Optics express.

[5]  R. Osellame,et al.  Femtosecond laser micromachining : photonic and microfluidic devices in transparent materials , 2012 .

[6]  Feng Chen,et al.  Simultaneous dual-wavelength lasers at 1064 and 1342 nm in femtosecond-laser-written Nd:YVO 4 channel waveguides , 2011 .

[7]  Eric Mazur,et al.  Femtosecond laser micromachining in transparent materials , 2008 .

[8]  Daniel Jaque,et al.  Highly efficient laser action in femtosecond-written Nd:yttrium aluminum garnet ceramic waveguides , 2008 .

[9]  Feng Chen,et al.  Micro‐ and submicrometric waveguiding structures in optical crystals produced by ion beams for photonic applications , 2012 .

[10]  Chao Zhang,et al.  Planar optical waveguides in Bi4Ge3O12 crystal fabricated by swift heavy-ion irradiation. , 2011, Applied optics.

[11]  N. Desai,et al.  Femtosecond-laser direct writing in polymers and potential applications in microfluidics and memory devices , 2012 .

[12]  Andreas Tünnermann,et al.  Optical properties of waveguides fabricated in fused silica by femtosecond laser pulses. , 2002, Applied optics.

[13]  Stephen Ho,et al.  Transition from thermal diffusion to heat accumulation in high repetition rate femtosecond laser writing of buried optical waveguides. , 2008, Optics express.

[14]  I. Bányász,et al.  Formation of slab waveguides in eulytine type BGO and CaF2 crystals by implantation of MeV nitrogen ions , 2012 .

[15]  G. Marshall,et al.  Study of the influence of femtosecond laser polarisation on direct writing of waveguides. , 2006, Optics express.

[16]  Feng Chen,et al.  Mid-infrared waveguides in zinc sulfide crystal , 2013 .

[17]  O. Hellmig,et al.  Nd:YAG waveguide laser with 1.3 W output power, fabricated by direct femtosecond laser writing , 2010 .

[18]  M J Withford,et al.  Fifty percent internal slope efficiency femtosecond direct-written Tm³⁺:ZBLAN waveguide laser. , 2011, Optics letters.

[19]  Feng Chen,et al.  Femtosecond-Laser-Inscribed BiB3O6 Nonlinear Cladding Waveguide for Second-Harmonic Generation , 2012 .

[20]  R Osellame,et al.  Active waveguides written by femtosecond laser irradiation in an erbium-doped phospho-tellurite glass. , 2008, Optics express.

[21]  Feng Chen,et al.  Femtosecond laser writing of multifunctional optical waveguides in a Nd:YVO4 + KTP hybrid system. , 2011, Optics letters.

[22]  P. D. Townsend,et al.  Formation of planar waveguides in bismuth germanate by 4He+ ion implantation , 1989 .

[23]  Feng Chen,et al.  Femtosecond laser inscribed cladding waveguides in Nd:YAG ceramics: fabrication, fluorescence imaging and laser performance. , 2012, Optics express.

[24]  Ian Bennion,et al.  Low loss depressed cladding waveguide inscribed in YAG:Nd single crystal by femtosecond laser pulses. , 2012, Optics express.

[25]  W. Drozdowski,et al.  Scintillation yield of Bi 4Ge 3O 12 (BGO) pixel crystals , 2010 .

[26]  K. Miura,et al.  Writing waveguides in glass with a femtosecond laser. , 1996, Optics letters.

[27]  Ari Tervonen,et al.  Ion-exchanged glass waveguide technology: a review , 2011 .

[28]  G. G. Bentini,et al.  Step-index optical waveguide produced by multi-step ion implantation in LiNbO3. , 2012, Optics express.

[29]  A. Okhrimchuk,et al.  Depressed cladding, buried waveguide laser formed in a YAG:Nd3+ crystal by femtosecond laser writing. , 2005, Optics letters.

[30]  D Yevick,et al.  Correspondence of variational finite-difference (relaxation) and imaginary-distance propagation methods for modal analysis. , 1992, Optics letters.

[31]  R. Osellame,et al.  Waveguide fabrication and supercontinuum generation in an ultrafast laser inscribed chalcogenide glass waveguide , 2007, 2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science.

[32]  Andreas Tünnermann,et al.  Femtosecond laser written stress-induced Nd:Y3Al5O12 (Nd:YAG) channel waveguide laser , 2009 .

[33]  P. Townsend,et al.  Optical effects of defect diffusion in Bi4Ge3O12 and Bi12 GeO20 produced by ion implantation , 1990 .

[34]  D. Jaque,et al.  Lattice micro-modifications induced by Zn diffusion in Nd:LiNbO3 channel waveguides probed by Nd3+ confocal micro-luminescence , 2007 .

[35]  Qianyun Bin,et al.  Femtosecond Laser-Written Waveguides in a Bismuth Germanate Single Crystal , 2009 .

[36]  Pablo F. Meilan,et al.  Femtosecond laser written surface waveguides fabricated in Nd:YAG ceramics. , 2007, Optics express.