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<p>This study presents an efficient photonic circuit for optical communication, integrating a laser diode, a photonic waveguide, and an optical demultiplexer. The laser diode was designed with high refractive index contrast materials—InGaAsP for the active layer and AlGaAs for the cladding layer—optimizing light confinement through total internal reflection. This design achieved an optical confinement efficiency of 84% and an exceptional internal quantum efficiency (IQE) of 99.7%. The waveguide demonstrated effective confinement with three unique structural configurations, as seen in refractive index profiles and mode intensity distributions for different wavelengths and core thicknesses. Finally, the optical demultiplexer successfully separated a 1550&#xa0;nm signal into four channels (1550, 1570, 1590, and 1610&#xa0;nm), each with equal power distribution. These results collectively highlight the circuit’s capability for precise wavelength control and high communication performance, essential for dense wavelength division multiplexing (DWDM) applications.</p>

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Efficient photonic integrated circuit for enhanced optical communication system

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • Dipan Kumar Dey,
  • Bibhu Prasad,
  • Partha Sarkar,
  • Gopinath Palai,
  • J. S. N. Achary,
  • Moumital Pal

摘要

This study presents an efficient photonic circuit for optical communication, integrating a laser diode, a photonic waveguide, and an optical demultiplexer. The laser diode was designed with high refractive index contrast materials—InGaAsP for the active layer and AlGaAs for the cladding layer—optimizing light confinement through total internal reflection. This design achieved an optical confinement efficiency of 84% and an exceptional internal quantum efficiency (IQE) of 99.7%. The waveguide demonstrated effective confinement with three unique structural configurations, as seen in refractive index profiles and mode intensity distributions for different wavelengths and core thicknesses. Finally, the optical demultiplexer successfully separated a 1550 nm signal into four channels (1550, 1570, 1590, and 1610 nm), each with equal power distribution. These results collectively highlight the circuit’s capability for precise wavelength control and high communication performance, essential for dense wavelength division multiplexing (DWDM) applications.