Enhanced Raman gain coefficients and bandwidths in P2O5 and WO3 added tellurite glasses for Raman gain media

Abstract

Articles you may be interested inCompositional effect of WO3, MoO3, and P2O5 on Raman spectroscopy of tellurite glass for broadband and high gain Raman amplifier Demonstration of enhanced population feeding of the 1.53 μ m emitting level of Er 3 + in Te O 2 -W O 3 -Li 2 O -P 2 O 5 glasses using upconversion luminescence spectroscopy

Electrical and dielectric analysis of phosphate based glasses doped with alkali oxides

“…The biggest contribution is given by the band centered at 855 cm -1 that can be related to stretching of Nb and its neighboring NBOs in NbO 6 distorted octahedra (niobium as network modifier) [24,[29][30][31] and/or to vibrations δ(Nb-O-P-O-Nb) where niobium acts as glass network former (NbO 4 structural units) [24,29]. The other two bands that form the overlapped band are at 922 cm -1 due to B-O-B and B-O vibrational modes in orthoborate groups of BO 3 triangular units [32][33][34], and at 957 cm -1 s (P-O -) terminal bonds in isolated tetrahedral (Q 0 ) and/or due to W-O -and W=O vibrations in WO 4 tetrahedra [11,35,36]. These last two bands have a slightly bigger contribution in the A-K spectrum, suggesting a larger formation of these structural units for this composition.…”

Gain flattened fiber raman amplifiers by tailoring raman amplification bandwidth of tellurite glasses

“…8 However, the peak gain coefficient of the glass that showed wider bandwidth was relatively lower, i.e., up to ~28 times that of silica. 9,10 This low Raman gain is due to the addition of P 2 O 5 to TBSN, which decreased the Raman peak intensity. 9 We have now thoroughly and systematically investigated the requirements to broaden the amplification bandwidth of tellurite glasses while maintaining larger Raman gain coefficient.…”

“…Tellurite glasses are characterized by high linear and nonlinear optical properties, [1][2][3][4][5] wide transmission window, 6 good glass stability and durability, 7 and high Raman gain coefficients and amplification bandwidths [8][9][10][11][12][13][14] for their numerous practical applications in photonics devices. In addition, tellurite glasses have low glass transition temperature (T g ) and high thermal stability against crystallization which are primary factors for successful fiber drawing with improved properties.…”

“…Motivated by this drawback, several groups initiated search for new tellurite glass compositions of wide amplification bandwidth. 5,9,10,[16][17][18][19][20][21][22] Murugan et al 21,23,24 developed new glass forming compositions in the TeO 2 -BaO-SrO-Nb 2 O 5 (TBSN) glass system that showed Raman amplification bandwidth similar to the silica glass. Further, combined generation of WO 6 octahedra and PO 4 tetrahedra in TBSN glasses increased the amplification bandwidth of tellurite glasses up to 1.7 times that of the silica glass.…”

1.4μm emission properties and local environments of Tm3+ ions in tellurite glass modified with MoO3

“…As such, other glass materials with bigger Raman scattering coefficient in a wider Stokes shift band have been demanded. Since the advent of tellurite-based RFA that exhibited appreciably wider gain bandwidth in a much shorter interaction length than silica-based RFA [10], attention has been paid to tellurite glass as a RFA material [11][12][13][14]. The Raman scattering coefficient and also bandwidth of tellurite glass can be controlled through compositional adjustments.…”