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Formulized analytical technique for gain characteristics of phosphate glass Er3+/Yb3+ co-doped waveguide amplifiers

Wang Y.H., Ma C.S., Li D.L., Zhang D.M.

Optica Applicata

2008

Vol. 38, nr 2

329-339

Novel formulas for analyzing the gain characteristics of the phosphate glass erbium-ytterbium (Er3+-Yb3+) co-doped waveguide amplifier (EYCDWA) are derived from the rate equations and the light propagation equations under the uniform dopant and steady-state conditions. In the derivation of these formulas, we have neglected the amplified spontaneous emission (ASE) and have introduced the initial energy transfer efficiency. By using these formulas, the effects of the pump power, signal power, dopant concentration and waveguide length on the gain characteristics of the EYCDWA are analyzed, the comparison is performed between the EYCDWA and the singly erbium-doped waveguide amplifier (EDWA), and some useful results are obtained.

Effect of bending on transmission characteristics of polymeric arrayed waveguide grating multiplexers

Qin Z.K., Ma C.S., Li D.L., Li H., Zhang D.M., Liu S.Y.

Optica Applicata

2008

Vol. 38, nr 2

315-327

In terms of the transmission theory of the arrayed waveguide grating (AWG), parameter optimization is performed, and bending effect of arrayed waveguides on transmission characteristics is analyzed for a 33×33 polymeric AWG multiplexer around the central wavelength of 1550.918 nm with the wavelength spacing of 0.8 nm. Analytical results show that the bending of arrayed waveguides causes the phaseshift of the light propagating in the AWG, results in the shift of the transmission spectrum, and brings about the variation of the crosstalk. For the designed AWG device, the Shift of the transmission spectrum is about 0.01 nm, which is much less than the wavelength spacing of 0.8 nm.

Design of athermal arrayed waveguide grating using silica/polymer hybrid materials.

Li D. L., Ma C. S., Qin Z. K., Zhang H. M., Zhang D. M., Liu S.Y.

Optica Applicata

2007

Vol. 37, nr 3

305-312

This study demonstrates a novel athermal arrayed waveguide grating (AWG) which is composed of silica/polymer hybrid materials on a silicon substrate. The temperature-dependent wavelength shift of the AWG depends on the refractive indices of the materials and the size of the waveguide. The athermalization of the AWG can be realized by selecting the proper values of the material and structural parameters of the device.