Study of Nd³⁺ ion as a Dopant in YAG and Glass Laser

Kireet Semwal^1, and S. C. Bhatt²

¹Department of Physics, G.B. Pant Engineering College, Pauri (Garhwal), India

²Department of Physics, HNB Garhwal Centrel University, Srinagar (Garhwal), India

Cite this paper:
Kireet Semwal and S. C. Bhatt. Study of Nd³⁺ ion as a Dopant in YAG and Glass Laser. International Journal of Physics. 2013; 1(1):15-21. doi: 10.12691/ijp-1-1-3

Abstract

Trivalent neodymium (Nd³⁺) is the most successful type of active ion for solid-state lasers and thus far has been made to lase in more types of crystal and glass hosts than any other ion. It can operate as either a pulsed or continuous-wave laser with a sharp emission line. The most common emission wavelength is near 1μm, but there are several possible laser transitions in the near-infrared spectral region, and in addition a near-ultraviolet laser line. Although the effects of different host environments on the spectroscopic properties of Nd³⁺ are more subtle than those for transition-metal ions, they can cause significant differences in lasing characteristics through changes in physical processes such as radiative transition strength, radiationless decay probabilities, excited-state absorption, and cross relaxation quenching. The Nd ion when doped into a solid-state host crystal produces the strongest emission at a wavelength just beyond 1μm. The two host materials most commonly used for this laser ion are yttrium aluminium garnet (YAG) and glass. At room temperature the 1.064μm radiative transition is homogeneous broadened with a narrow emission line width of 0.45nm and the upper level lifetime is 230μs. Nd can be doped to very high concentration in glass. The outstanding practical advantage compared to crystalline materials is the tremendous size capability for high-energy applications. The fluorescent lifetime is approximately 300μs, and, the emission line width is 18-28nm.

Keywords:
Nd³⁺ Nd:YAG laser Nd:Glass laser

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References:

[1]	K. J. Kuhn; Laser Engineering, Prentice Hall Pub., 1998.
[2]	L. R. Marshall, A. D. Hays, H. J. Kasinski, and R. Burnham; “Highly efficient optical parametric oscillators”, SPIE, 1419: 141-152, 1991.
[3]	R. D. Stultz, D. E. Nieuwsma, E. Gregor; SPIE, 1419: 64-74, 1991.
[4]	Walter Koechner, Solid State Laser Engineering, 5rh ed., Springer Berlin, 1999.
[5]	Willium T. Silfvast, Laser Fundamentals, Cambridge University Press, 1991.
[6]	V. J. Corcoran; “High-repetition-rate eyesafe rangefinders” SPIE, 1419: 160-163, 1991.
[7]	J. A. Skidmore, M. A. Emanuel, R. J. Beach, B. L. Freitas, N. W. Carlson, C. D. Marshall, W. J. Benett, R. W. Solaz, D. P. Bour, and D. W. Treat; “New diode wavelengths for pumping solid state lasers”, SPIE Proceedings, 2382: 106-116, 1997.
[8]	J.E. Geusic, H.M. Marcos, L.G. Van Uitert; “LASER OSCILLATIONS IN Nd‐DOPED YTTRIUM ALUMINUM, YTTRIUM GALLIUM AND GADOLINIUM GARNETS”, Appl. Phys.Letters 4(10): 182, 1964.
[9]	Z. J. Kiss and R. J. Pressley; “Crystalline solid lasers”, Proc. IEEE 54(10): 1236, 1966.
[10]	Z. J. Kiss and R. J. Pressley; “Crystalline Solid Lasers”. Appl. Opt., 5(10): 1474-1486, 1966.
[11]	R. V. Alves, R. A. Buchanan, K. A. Wickersheim, E. A. C. Yates; “Neodymium‐Activated Lanthanum Oxysulfide: A New High‐Gain Laser Material”, J. Appl. Phys. 42(8): 3043, 1971.
[12]	T. Kushida, J. E. Geusic; “Optical Refrigeration in Nd-Doped Yttrium Aluminum Garnet”, Phys. Rev. Letters, 21(16): 1172, 1968.
[13]	W. F. Krupke, M. D. Shinn, J. E. Marion, J. A. Caird, and S. E. Stokowski; “Spectroscopic, optical, and thermomechanical properties of neodymium- and chromium-doped gadolinium scandium gallium garnet”, J. Opt. Soc. Am. B, 3(1): 102, 1986.
[14]	R. C. Powell, S. A. Payne, L. L. Chase and G. D. Wilke; “Index-of-refraction change in optically pumped solid-state laser materials”, Opt. Lett., 14(22): 1204-1206, 1989.
[15]	G.H. Dieke and H.M. Crosswhite; “The Spectra of the Doubly and Triply Ionized Rare Earths”, Appl. Opt., 2(7): 675, 1963.
[16]	B. R. Judd; “Optical Absorption Intensities of Rare-Earth Ions”, Phys. Rev., 127(3): 750, 1962.
[17]	M. Birnbaum; “Stimulated emission cross section at 1.061 μm in Nd:YAG”, J. Appl. Phys., 44(6): 2928, 1973.
[18]	T. Kushida, H. M. Marcos, J. E. Geusic; “Laser Transition Cross Section and Fluorescence Branching Ratio for Nd3+ in Yttrium Aluminum Garnet”. Phys. Rev., 167(2): 289-291, 1968.
[19]	H. F. Mahlein; IEEE J. Quant. Electr. QE-6: 529, 1970.
[20]	C. G. Bethea; IEEE J. Quant. Electr. QE-9: 254, 1973.
[21]	N.P. Barnes, D.J. Gettemy, L. Esterowitz, and R.E. Allen; IEEE J. Quant Elect. QE-23, 1434, 1987.
[22]	F. J. Duarte, Tunable Laser Optics, Elsevier-Academic, New York, 2003.
[23]	D. Y. Shen et al., “Highly efficient in-band pumped Er:YAG laser with 60 W of output at 1645 nm”, Opt. Lett. 31(6): 754-756, 2006.
[24]	Li Chaoyang et al., “106.5 W high beam quality diode-side-pumped Nd:YAG laser at 1123 nm”, Opt. Express 18(8): 7923-7928, 2010.
[25]	X.Delen et al, “34 W continuous wave Nd:YAG single crystal fiber laser emitting at 946 nm”, Appl. Phys. B 104(1): 1, 2011.
[26]	H.C. Lee et al., “Diode-pumped continuous-wave eye-safe Nd:YAG laser at 1415 nm”, Opt. Lett. 37(7): 1160, 2012.