Abstract:A new infrared luminescence from bismuth-doped silica glass is discovered. Spectroscopic properties of this glass are different from those of previously reported Bi2+- or Bi3+-doped glasses or crystals. Its luminescence spectrum is wide (full-width at half maximum; about 200 nm), with the peak at 1140 nm with 500 nm excitation. Absorption bands exist between the visible and near-infrared region. The lifetime of bismuth-doped silica glass is 630 µs at room temperature, which is longer than the lifetimes of Bi3+… Show more
“…They were ascribed to the electron transitions of infrared active centers. 11,14 According to Ref. 15, the peaks at 700, 800, and 1000 nm are most probably originated from the transitions from the 3 P 0 level to the 1 D 2 , 3 P 2 , and 3 P 1 levels of the Bi + center.…”
Section: Resultsmentioning
confidence: 99%
“…11 In recent years, a number of hosts were investigated and broadband infrared luminescence was reported in silicate, 12,13 germanium, 14 phosphate, 15 and barium borate glasses. 16 It is exciting that optical amplification and lasing operation were also realized at present.…”
Bi, Ga, and Al codoped germanium glass was prepared and its optical properties were investigated by absorption, photoluminescence excitation ͑PLE͒, and photoluminescence spectra. Two active centers which occupy strong and weak crystal field environment are identified by using the PLE spectrum. The tunable and ultrabroadband luminescence properties are originated from electron transitions of these two active centers. Internal optical gain around 1300 and 1560 nm has been detected. The wavelength-dependent internal gains excited with 808 and 980 nm laser diodes show different characteristics, and the relative flat optical amplification can be realized by choosing 980 nm pumping.
“…They were ascribed to the electron transitions of infrared active centers. 11,14 According to Ref. 15, the peaks at 700, 800, and 1000 nm are most probably originated from the transitions from the 3 P 0 level to the 1 D 2 , 3 P 2 , and 3 P 1 levels of the Bi + center.…”
Section: Resultsmentioning
confidence: 99%
“…11 In recent years, a number of hosts were investigated and broadband infrared luminescence was reported in silicate, 12,13 germanium, 14 phosphate, 15 and barium borate glasses. 16 It is exciting that optical amplification and lasing operation were also realized at present.…”
Bi, Ga, and Al codoped germanium glass was prepared and its optical properties were investigated by absorption, photoluminescence excitation ͑PLE͒, and photoluminescence spectra. Two active centers which occupy strong and weak crystal field environment are identified by using the PLE spectrum. The tunable and ultrabroadband luminescence properties are originated from electron transitions of these two active centers. Internal optical gain around 1300 and 1560 nm has been detected. The wavelength-dependent internal gains excited with 808 and 980 nm laser diodes show different characteristics, and the relative flat optical amplification can be realized by choosing 980 nm pumping.
“…Bismuth-doped silica glass (BiSG) is a new material that emits a broadband fluorescence peak at around 1250 nm with a bandwidth over 300 nm. We suggested BiSG which can complement the problems of the other optical amplifiers (Fujimoto & Nakatsuka, 2001;2003). It is important to understand the optical properties of the BiSG for technological applications such as optical fiber amplifier and fiber laser.…”
Section: Frontiers In Guided Wave Optics and Optoelectronics 106mentioning
“…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. 24 The related information was also summarized in the recent review.…”
aThe bismuth doped aluminosilicate phases leucite (KAlSi 2 O 6 ), gallium leucite (KGaSi 2 O 6 ) and pollucite (CsAlSi 2 O 6 ) display broadband NIR photoluminescence. The active center, responsible for this luminescence, is the Bi + monocation, which substitutes for the large alkali metal cations. The Al,Si-disorder in the aluminosilicate framework of studied crystal phases results in the heterogeneity of Bi + luminescent center population, which manifests itself in the characteristic dependency of the luminescence spectrum shape on the excitation wavelength. The relation of NIR emission in Bi + -doped leucite and pollucite phases to the luminescent properties of bismuth-doped glasses is also discussed.
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