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Infrared fibers based on Te–As–Se glass system with low optical losses

“…Usually, the mechanical bending strength of single-index Te-As-Se glass fiber [4] is lower in comparison with silica or even As-S glass fiber. But with a polymeric or metallic coating [8] the mechanical strength can be higher and stable in time.…”

“…In the literature there are some data on manufacturing single-index [4,6,7] and core-clad Te-As-Se fiber [8][9][10]. A single-index fiber based on Ge 27 Se 18 Te 55 glass has been reported [6] with optical losses of 0.6 and 1.5 dB/m at the wavelengths of 8.2 and 10.6 lm, respectively, as well as fibers based on Ge 30 As 10 Se 30 Te 30 glass with optical losses of 0.11and 1.88 dB/m at respectively 6.6 and 10.6 lm [7].…”

“…These fibers had minimal optical loss of 0.24 dB/m at 7.2 lm. According to [8], the core-clad fiber of Ge 2 As 38 Se 40 Te 20 / Ge 2 As 36 Se 44 Te 18 composition manufactured by double crucible method has optical losses of 0.15 dB/m at 6.6 lm and 3.6 dB/m at 10.6 lm. The Ôrod-in-tube' method [11], and Ôdouble crucible' method [8] are generally used to prepare core-clad fibers.…”

Structural and chemical homogeneity of chalcogenide glass prepared by melt-rocking

“…[20][21][22] As pointed out in a review of the Ge-Se system, 20 the source of the discrepancy appears to be mainly attributed to an unusual synthesis method involving static homogenization of the melt over extended periods of time. [23][24][25][26][27][28] Yet, a brief survey of the literature indicates that chalcogenide glasses have been synthesized by melt-rocking for more than fifty years 14,22,[29][30][31][32][33][34][35][36][37][38] and that they are currently produced industrially in the same manner. 39,40 The melt-rocking method has been adopted by the chalcogenide glass community early on when it was recognized that convection considerably reduces synthesis time by facilitating melt homogenization.…”