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Low crosstalk four-channel photonic crystal demultiplexer

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Abstract

In the present paper, a four-channel optical demultiplexer (DMUX) based on two-dimensional photonic crystal has been presented. In this optical demultiplexer, filtering and wavelength separation were performed using point defects between the output and input waveguides. To design the optical demultiplexer, a 31 × 21 resonance filter with a lattice constant (Λ) of 0.54 μm and the radius of the dielectric rods of 0.2Λ was first designed, and then it was expanded to obtain a four-channel 31 × 41 demultiplexer. The output wave spectrum was measured for four channels in the range of 1541.5 nm to 1557.6 nm. The average quality factor of 2567, the average crosstalk of − 25 dB, and the transmission coefficient of higher than 97% were obtained.

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Abbreviations

CWDM:

Coarse wavelength-division multiplexing

dB:

Decibel

DMUX:

Demultiplexer

PBG:

Photonic bandgap

PWE:

Plane wave expansn

TE:

Transverse electric

TM:

Transverse magnetic

WDM:

Wavelength-division multiplexing

nair :

Refractive index of air

nsilicon :

Refractive index of Silicon rods

Q:

Quality factor

R:

Radius

λ :

Central wavelength

∆λ :

Bandwidth

Λ:

Lattice constant

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Acknowledgements

This work was supported by the Nano-photonics and Optoelectronics Research Laboratory (NORLab), Shahid Rajaee Teacher Training University, Iran.

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Authors and Affiliations

  1. Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, 16788-15811, Tehran, Iran

    MOHAMMAD AZADI & MAHMOOD SEIFOURI

  2. Nano-photonic and Optoelectronic Research Laboratory (NORLab), Shahid Rajaee Teacher Training University, 16788-15811, Tehran, Iran

    SAEED OLYAEE

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  1. MOHAMMAD AZADI
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  2. MAHMOOD SEIFOURI
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  3. SAEED OLYAEE
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Correspondence to SAEED OLYAEE.

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AZADI, M., SEIFOURI, M. & OLYAEE, S. Low crosstalk four-channel photonic crystal demultiplexer. Sādhanā 46, 173 (2021). https://doi.org/10.1007/s12046-021-01699-w

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  • DOI: https://doi.org/10.1007/s12046-021-01699-w

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