Assessment of gadolinium calcium oxoborate (GdCOB) for laser applications

• Autorzy: Bajor A. L. , Kisielewski J. , Kłos A. , Kopczyński K. , Łukasiewicz T. , Mierczyk J. , Młyńczak J.
• Języki publikacji: EN

Abstrakty

EN

Increasing demand for growing high quality laser crystals puts a question about their most important parameters that one should concentrate on to get a desired product which will exhibit best properties in practical use. And by no means, this is a simple question. Apart of the usual lasing properties associated with a special dopant in the host material itself, one needs to consider another two lasing phenomena, namely second (SHG) and higher harmonic generation, and self-frequency doubling (SFD). Not necessarily all of these three can meet altogether in the same host material to yield in its best appearance in every case. We have made a review of basic properties of gadolinium oxoborate GdCa₄O(BO₃)₃ (GdCOB) crystal and came to the conclusion that, currently, as a host material this is probably the best in all of its lasing applications. Although GdCOB has low thermal conductivity, which requires a suitable cooling, on the other hand it has got small thermo-optic coefficients which govern good operation in SHG and SFD experiments. Two inch dia. Nd-doped crystals were grown by the Czochralski technique. Since a large discrepancy in the literature exists on exact values of nonlinear coefficients, one is never sure about this whether theoretically predicted phase-matching angles (PMA) are those that are really optimal. Besides, none has yet measured the values of nonlinear coefficients as a function of doping concentration. Therefore we have not decided to cut numerous differently oriented samples for generation of different wavelengths in SHG and SFD, but rather tried to generate different wavelengths from the same samples. We have also not paid special attention to get highest possible conversion efficiencies. However, we have concentrated our attention on potential use of the core region in laser technique. Unlike in YAG crystals, when the core is by all means a parasitic structure, we discovered that the core region in GdCOB, that majority of investigators are even not aware of its presence in the crystal, can be also useful in laser technique. According to our best knowledge, a SHG of red light in this work is the second reported case in the world-wide literature.

Słowa kluczowe

EN

Czochralski method; GdCOB; SGH; SFD

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2011
• Tom: Vol. 19, No. 4
• Strony: 439--448
• Opis fizyczny: Bibliogr. 30 poz.

Twórcy

autor

Bajor A. L.

autor

Kisielewski J.

autor

Kłos A.

autor

Kopczyński K.

autor

Łukasiewicz T.

autor

Mierczyk J.

autor

Młyńczak J.

• Institute of Electronic Materials Technology, 133 Wólczyńska Str., 01-919 Warsaw, Poland,

Bibliografia

• [1] R. Paschotta, “An open access encyclopedia for photonics and laser technology” http://www.rp-photonics.com/encyclopedia.html .
• [2] G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Goodard, “A new non-linear and neodymium laser self-frequency doubling crystal with congruent melting: Ca4GdO(BO3)3 (GdCOB)”, Eur. J. Sol. Stat. Inor. 33, 727-736 (1996).
• [3] X. Hu, J. Wang, S. Jiang, H. Liu, M. Guo, H. Jiang, C. Zhang, Y. Tian, and W. Huang, “Image shifts resulting from the misorientation of two individuals in Ca4GdO(BO3)3 crystal”, J. Cryst. Growth 229, 252-255 (2001).
• [4] G. Aka, F. Mougel, D. Pelenc, B. Ferrand, and D. Vivien, “Comparative evaluation of GdCOB and YCOB nonlinear-optical properties, in principal and out of principal plane configurations, for the 1064 nm Nd:YAG laser frequency conversion”, Proc. SPIE 3928, 108-114 (2000).
• [5] S. Zhao, J. Lu, Z. Wang, J. Wang, and M. Jiang, “Anisotropic properties of Nd:ReCOB (Re=Y, Gd): a low symmetry self-frequency doubling crystal”, Progr. Cryst. Growth Ch. 40, 63-73 (2000).
• [6] Z. Wang, R. Song, X. Xu, X. Sun, J. Wang, J. Wei, and Z. Shao, “Absolute scale and spatial distribution of nonlinear-optical coefficients of GdCOB crystal”, Acta Opt. Sinica 21, 1022-1024 (2001).
• [7] X. Chen, M. Huang, Z. Luo, and Y. Huang, “Determination of the optimum phase-matching directions for the self-frequency conversion of Nd:GdCOB and Nd:YCOB crystals”, Opt. Commun. 196, 299-307 (2001).
• [8] Zh. P. Wang, J. H. Liu, R. B. Song, H. D. Jiang, S. J. Zhang, K. Fu, Ch. Q. Wang, J. Y. Wang, Y. G. Liu, J. Q. Wei, H. Ch. Chen, and Z. Sh. Shao, “Anisotropy of nonlinear-optical property of RCOB (R=Gd, Y) crystal”, Chin. Phys. Lett. 18, 385-387 (2001).
• [9] F. Mougel, G. Aka, F. Salin, D. Pelenc, B. Ferrand, A. Kahn-Harari, and D. Vivien, “Accurate second harmonic generation phase matching angles prediction and evaluation of nonlinear coefficients of Ca4YO(BO3)3 (YCOB) crystal”, Advanced Solid−State Lasers -OSA Trends in Opt. Photon. Ser. 26, 709-714 (1999).
• [10] G. Aka, F. Mougel, D. Vivien, R. Klein, G. Kugel, B. Ferrand, D. Pelenc, in C. Marshall (Ed.), OSA Proc. Series on Advanced Solid State Lasers 2001, 50, 548 (2001).
• [11] D. Xue and S. Zhang, “Structural analysis of nonlinearities of Ca4ReO(BO3)3 (Re=La, Nd, Sm, Gd, Er, Y)”, Appl. Phys. A68, 57-61 (1999).
• [12] J. Lu, G. Li, J. Liu, Sh. Zhang, H. Chen, M. Jiang, and Z. Shao, “Second harmonic generation and self-frequency doubling performance in Nd:GdCa4O(BO3)3 crystal”, Opt. Commun. 168, 405-408 (1999).
• [13] Zh. Wang, J. Liu, R. Song, X. Xu, X. Sun, H. Jiang, K. Fu, J. Wang, Y. Liu, J. Wei, and Z. Shao, “The second-harmonic-generation property of GdCa4O(BO3)3 crystal with various phase matching directions”, Opt. Commun. 187, 401-405 (2001).
• [14] F. Mougel, A. Kahn-Harari, G. Aka, and D. Pelenc, “Structural and thermal stability of Czochralski grown GdCOB oxoborate single crystals”, J. Mater. Chem. 8, 1619-1623 (1998).
• [15] Catalogue of the DeLnOptics Co. www.delnoptics.com.
• [16] J. M. Kim, in New Physics (Kor.), 56, 203 (2008).
• [17] Catalogue of the Coherent Optics Co., www.coherent.com.
• [18] Z. G. Hu and P. Hess, “Optical constants and thermo-optic coefficients of nanocrystalline diamond films at 30-500°C”, Appl. Phys. Lett. 89, 081906 (2006).
• [19] Catalogue of the APC Co., www.americanphotonics.com
• [20] A. Kłos, J. Z. Domagała, A. Bajor, and A. Pajączkowska, “Structure deformation in GdCOB single crystals grown by the Czochralski method”, Cryst. Growth Des. 8, 3253-3256 (2008).
• [21] A. L. Bajor, T. Piątkowski, and M. Leśniewski, “Automated birefringence dispersion measurements”, Meas. Sci. Technol. 17, 427-435 (2006).
• [22] J. Młyńczak, K. Kopczyński, J. Mierczyk, and G. Adamski, “Measurement setup for investigation of nonlinear absorption”, Proc. 4th Conf. on Optoelectronics, Poznań, 2005. (in Polish).
• [23] F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB)”, Opt. Mater. 8, 161-173 (1997).
• [24] A. Brenier, D. Jaque, and A. Majchrowski, “Bi-functional laser and non-linear optical crystals”, Opt. Mater. 28, 310-323 (2006).
• [25] X. Hou, J. Huang, Y. Li, Y. Sun, and L. Pan, “Space phase matching and self-frequency-doubling red laser in Nd:GdCOB crystal”, Opt. Laser Technol. 35, 471-474 (2003).
• [26] P. B.W. Burmester, T. Kellner, E. Heumann, G. Huber, R. Uecker, and P. Reiche, “Blue laser emission at 465 nm by type-I noncritically phase-matched second harmonic-generation in Gd1-xYxCa4O(BO3)3”, Laser Phys. 10, 441-443 (2000).
• [27] G. Aka and A. Brenier, “Self-frequency conversion in non-linear laser crystals”, Opt. Mater. 22, 89-94 (2003).
• [28] J. Wang, Z. Shao, J. Wei, X. Hu, Y. Liu, B. Gong, G. Li, J. Lu, M. Guo, and M. Jiang, “Research on growth and self-frequency-doubling of Nd:ReCOB (R=Y or Gd) crystals”, Prog. Cryst. Growth Ch., 17-31 (2000).
• [29] X. Hou, Y. Sun, Y. Li, Sh. Xu, E. Liu, Sh. Zhang, Zh. Cheng, H. Chen and Z. Shao, “Laser characteristics of Cr:Nd: GdCOB self-frequency-doubling crystal”, Opt. Laser Technol. 32, 135-138 (2000).
• [30] T. Łukasiewicz, I. V. Kityk, M. Makowska-Janusik, A. Majchrowski, Z. Gałązka, H. Kaddouri, and Z. Mierczyk, “Influence of Ca4GdO(BO3)3 doping on its properties”, J. Cryst. Growth 237-239, 641-644 (2002).