Characteristics of a multi-mode interference device based on Ti:LiNbO3 channel waveguide

Characteristics of a multi-mode interference device based on Ti:LiNbO3 channel waveguide

We have analyzed the multi-mode interference effect depending on the wavelength and the polarization states of input beam in a multi-mode Ti:LiNbO(3) waveguide at about 1300 nm region. The transmitted optical signal of a Ti:LiNbO(3) waveguide shows the periodic oscillation as a function of input wav...

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Veröffentlicht in:Optics express 2009-06, Vol.17 (13), p.10718-10724
Hauptverfasser: Lee, Y L, Eom, T J, Shin, W, Yu, B-A, Ko, D-K, Kim, W-K, Lee, H-Y
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container_end_page 10724
container_issue 13
container_start_page 10718
container_title Optics express
container_volume 17
creator Lee, Y L
Eom, T J
Shin, W
Yu, B-A
Ko, D-K
Kim, W-K
Lee, H-Y
description We have analyzed the multi-mode interference effect depending on the wavelength and the polarization states of input beam in a multi-mode Ti:LiNbO(3) waveguide at about 1300 nm region. The transmitted optical signal of a Ti:LiNbO(3) waveguide shows the periodic oscillation as a function of input wavelength. The measured average periodicity of the oscillation in TM and TE polarization beams were about 18 nm and 48 nm, respectively. Actually, the periodicity is determined by the refractive index difference between the two modes (fundamental and first modes). Therefore, we have explained the experimental results with the theoretical calculations which are derived from a quasi-analytical technique based on the effective-refractive- index method and the equation of coupling length determined by the mode phase factor in the multi-mode waveguide.
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title Characteristics of a multi-mode interference device based on Ti:LiNbO3 channel waveguide
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