Optical Properties of 1.47-μm Emission in Tm3+-doped Li2O-SrO-ZnO-Bi2O3 Glasses

Tm 3+ -doped Li2O-SrO-ZnO-Bi2O3 (LSZB) glasses that are suitable for optical amplifier applications have been fabricated through the conventional melt-quenching method, and the spectroscopic properties of Tm 3+ in the glasses were characterized. The density, the refractive indices, the optical absorption, the Judd-Ofelt parameters Ωt, and the spon- taneous transition probabilities of the glasses were measured and calculated. Using the least-squares fitting method, the Judd-Ofelt intensity parameters Ωt were found to be 2=4.2910 -20 cm 2 , 4=1.1610 -20 cm 2 , and 6=0.8410 -20 cm 2 . Intense 1.47-m fluorescence was observed in these glass systems under 785-nm excitation. The emission peak from the Tm 3+ : 3 H4  3 F4 transition locates around 1.47-µm with a bandwidth is ~112 nm, which is significantly wider than the bandwidth of Tm 3+ -doped ZBLAN at 80nm but smaller than that in KBG glasses. The results indicate that Tm 3+ -doped LSZB glasses is a promising host material for applications in optical amplifiers.

[1]  Hai Lin,et al.  Intense visible fluorescence and energy transfer in Dy3+, Tb3+, Sm3+ and Eu3+ doped rare-earth borate glasses , 2005 .

[2]  B. Aitken,et al.  Tm-doped alkaline earth aluminate glass for optical amplification at 1460 nm , 2004 .

[3]  E. Pun,et al.  1.47-µm emission and multiphonon relaxation of Tm 3+ ions in potassium bismuth gallate glasses , 2004 .

[4]  J. Adam,et al.  Spectroscopic properties and laser emission of Tm doped ZBLAN glass at 1.8 μm , 2003 .

[5]  Younes Messaddeq,et al.  Red-green-blue upconversion emission and energy-transfer between Tm 3+ and Er 3+ ions in tellurite glasses excited at 1.064 μm , 2003 .

[6]  Boris I. Shraiman,et al.  Towards the clarity limit in optical fibre , 2000, Nature.

[7]  J. Heo,et al.  Multiphonon and cross relaxation phenomena in GeAs(or Ga)S glasses doped with Tm3 , 1996 .

[8]  J. Heo,et al.  Spectroscopic analysis of Tm(3+) in PbO-Bi(2)O(3)-Ga(2)O(3) glass. , 1995, Applied optics.

[9]  E. M. Vogel,et al.  Tellurite glass: a new candidate for fiber devices , 1994 .

[10]  T. Komukai,et al.  Efficient upconversion pumping at 1.064 mu m Tm/sup 3+/-doped fluoride fibre laser operating around 1.47 mu m , 1992 .

[11]  M. J. O'Mahony,et al.  Optical amplifiers and their applications , 1989, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[12]  R. Alcalá,et al.  Optical properties of Tm3+ in fluorozirconate glass , 1987 .

[13]  Douglas H. Blackburn,et al.  Optical properties of Nd3+ in tellurite and phosphotellurite glasses , 1981 .

[14]  Renata Reisfeld,et al.  Eigenstates and radiative transition probabilities for Tm3+ (4f12) in phosphate and tellurite glasses , 1977 .

[15]  B. Judd,et al.  OPTICAL ABSORPTION INTENSITIES OF RARE-EARTH IONS , 1962 .

[16]  G. S. Ofelt.  Intensities of Crystal Spectra of Rare‐Earth Ions , 1962 .