Broadband optical amplification in Bi-doped germanium silicate glass

Abstract

Bi-doped germanium silicate glass is prepared and their optical properties are investigated. The glass sample shows broadband and flat emission characteristics compared with germanate glass. The single-pass optical amplification was measured on a traditional two-wave mixing configuration. Ultrabroadband optical amplification at 1272 and 1560nm is observed simultaneously. The highest gain at 1272nm of germanium silicate glass reaches to 6.73dB excited with single commercially available 980nm laser diode. The glass is promising for optical amplification covering almost all the O, E, S, C, and L bands.

Bismuth-doped glass microsphere lasers

“…Two characteristic absorption bands around 500 and 800 nm are observed (see highlighted regions); these are attributed to electronic transitions of Bi, as previously reported [28,29]. The absorption intensity of Bi increases monotonically as the doping concentration of Bi 2 O 3 increases.…”

Enhanced broadband near-infrared emission and energy transfer in Bi-Tm-codoped germanate glasses for broadband optical amplification

“…Optical amplification in 1272-1348 nm and 1430-1495 nm wavelength ranges has been demonstrated in Bi-doped germanate glasses [11,12] and silicate fibers [13], respectively. Broadband optical amplification covering 1270-1600 nm wavelength region was also reported in Bi-doped germanate glasses, although rapidly decreased optical gain has to be accepted with the increment of signal wavelength, since there is a strong resemblance between the wavelength-dependent optical gain and fluorescence spectrum [14].…”

“…Optical amplification in 1272-1348 nm and 1430-1495 nm wavelength ranges has been demonstrated in Bi-doped germanate glasses [11,12] and silicate fibers [13], respectively. Broadband optical amplification covering 1270-1600 nm wavelength region was also reported in Bi-doped germanate glasses, although rapidly decreased optical gain has to be accepted with the increment of signal wavelength, since there is a strong resemblance between the wavelength-dependent optical gain and fluorescence spectrum [14].For practical application in the WDM system, the materials with efficient and flat amplification characteristic are necessary, since gain excursion over the whole spectral width can be minimized. Based on our earlier studies, it is possible to obtain ultrabroadband emission through codoping bismuth with Tm 3+ .…”

“…Recently, Bi-doped glasses with broadband near-IR (NIR) luminescent properties have been extensively studied [4][5][6][7][8][9][10][11][12][13][14]. Among them, germanate glasses are particularly attractive because of their efficient luminescence [6].…”

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

“…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.…”