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Temperature-Insensitive Dual-Comb Filter Based on Multimode Interference Ti : LiNbO _{3} Waveguide

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10 Author(s)
Lee, Y.L. ; Adv. Photonics Res. Inst., Gwangju ; Choi, Y.-W. ; Jung, H.S. ; Eom, T.J.
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A temperature-insensitive dual-comb filter has been demonstrated for the first time by multimode interference based on a Ti:LiNbO3 channel waveguide. The phase difference between comb filters was about 180deg. We only observed less than plusmn0.125-nm variation of the center wavelength of the filter during temperature change from 20degC to 50degC. The measured extinction ratio and channel spacing of the comb filter were about -25 dB and 3.2 THz, respectively.

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Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 8 )