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A novel wavelength-division multiplexer using grating-assisted two-mode interference

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6 Author(s)
Tzong-Yow Tsai ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Zhi-Cheng Lee ; Chi-Shiun Gau ; Fu-Shing Chen
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A novel design of wavelength-division multiplexer based on two-mode interference assisted by a highly dispersive grating structure is two-dimensionally simulated and analyzed using finite-difference time-domain method. We show that the designed grating waveguide provides a mode-dependent reflection spectrum which can be used to modify the beat lengths of the two selected wavelengths 1342 and 1560 nm, so that they can be divided in a very short distance about 48 μm. Simulation results show that contrasts /spl sim/12 dB and insertion losses about 2 dB could be achieved.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 10 )