Optical amplification in bismuth-doped silica glass

Abstract

We demonstrated an amplification phenomenon in a bismuth-doped silica glass at 1.3 μm with 0.8-μm excitation. This luminescent material is a promising candidate for use as the core-fiber material of an optical amplifier at the natural zero-dispersion wavelength (1.3 μm) of silica glass fiber.

Infrared luminescence and amplification properties of Bi-doped GeO2−Ga2O3−Al2O3 glasses

“…These values are larger than the reported results in Bi-doped silica glass. 17 The optical amplification with 77 nm bandwidth implies the GGAB glass can overcome the disadvantages of the present praseodymium-doped fluoride fiber amplifiers such as brittle and narrow amplification bandwidth ͑25 nm͒. 28,29 Furthermore, it is significant to point out that the amplification phenomenon at 1560 nm is also observed.…”

“…16 It is exciting that optical amplification and lasing operation were also realized at present. [17][18][19][20][21][22] Among the obtained results, an interesting phenomenon that was seldom observed in other active materials is the excitation wavelength sensitive luminescence, and the largest displacement of 200 nm was reported. 12 This special characteristic is significant since it offers the opportunity for realizing tunable and broadband lasers and amplifiers.…”

Near infrared photoluminescence of the univalent bismuth impurity center in leucite and pollucite crystal hosts

“…[26][27][28] A lot of subvalent bismuth polycations were known since the 1960s and the broadband NIR and even mid-infrared luminescence from Bi 5 3+ and Bi 8 2+ polycations have been discovered recently. [29][30][31][32][33] It is interesting that NIR luminescence has also been detected from the bismuth dimer anion (Bi 2 2À ) in the (K-crypt) 2 Bi 2 crystal phase. 34 It was also demonstrated that the univalent bismuth cation (Bi + ) is the NIR emitter in the ternary halide crystals KAlCl 4 , KMgCl 3 , RbPb 2 Cl 5 , and CsCdCl 3 , 14,17,18,35,36 where Bi + substitutes isomorphically for the large alkali cations.…”

“…34 It was also demonstrated that the univalent bismuth cation (Bi + ) is the NIR emitter in the ternary halide crystals KAlCl 4 , KMgCl 3 , RbPb 2 Cl 5 , and CsCdCl 3 , 14,17,18,35,36 where Bi + substitutes isomorphically for the large alkali cations. On the other hand, it seems that several different emitters contribute to the net NIR photoluminescence in Bi-doped SiO 2 and GeO 2 -based glasses. 37,38 To understand the origin of NIR photoluminescence in Bi-containing silicate and germanate glasses, the investigation of model SiO 2 or GeO 2 -based crystals doped with bismuth is highly desirable, since crystal hosts offer a more restrictive and structured environment for the possible bismuth-containing luminescent species.…”

“…Since the discovery of the broadband near-infrared (NIR) photoluminescence from bismuth doped glasses [1][2][3][4][5] and crystalline materials [6][7][8][9][10][11][12][13][14][15][16][17][18][19] the nature of corresponding luminescent species is widely discussed. The Bi 3+ ion in the common oxidation state +3 has no optical transitions in NIR and the observed emission was attributed to possible Bi 5+ , 1 Bi 2+ , 20 Bi + , 21 Bi 0 , 8,9,22 Bi 2 À , Bi 2 2À , 23 and bismuth cluster species.…”