VOLUME 6 - 2026 - ISSUE 1
Design and Simulation Based Analysis of Electrical, Optical and Thermal Performance of 1550nm Distributed Feedback Laser Diode .
Corresponding Author : Ayushmita Singh
Co-Authors : Surbhi Gupta, Dr. Somna S Mahajan
Abstract :
Distributed Feedback (DFB) laser diodes that operate at 1550 nm are key components in modern optical communication systems. Their spectral purity and wavelength stability make them ideal for high-capacity Fiber-optic links.The main goal of this study is to identify an optimized laser structure that maintains reliable single-mode operation under realistic conditions while achieving a lower threshold current.The optical analysis of the proposed DFB laser structure used Lumerical MODE and FDTD simulation tools. The optical results showed strong mode selectivity with lasing centred at the desired 1550 nm wavelength indicating effective single-mode performance. The electrical performance was studied with Lumerical CHARGE, focusing on carrier transport and recombination in the multilayer semiconductor structure. The analysis included current-voltage (I-V) characteristics and threshold current density estimation. Thermal characteristics of the device were evaluated using Lumerical HEAT simulations. The results emphasize the importance of thermal management in ensuring stable optical output and long-term device reliability. Overall, the optimized DFB laser design shows stable single-longitudinal-mode operation at 1550 nm, with a significantly reduced threshold current and better spectral purity than traditional structures. The integration of efficient carrier confinement and regulated thermal dissipation supports consistent device performance across a wide range of operating conditions. This work highlights the effectiveness of Lumerical’s integrated multiphysics simulation framework for the organized design and improvement of DFB laser diodes. The proposed design approach and analytical method offer valuable insights for developing high-performance 1550 nm DFB lasers aimed at Dense Wavelength Division Multiplexing (DWDM) systems and next-generation optical communication networks.
Keywords :
Ansys Lumerical; Bragg grating; single-mode semiconductor lasers; 1550 nm wavelength.
Article Details
Unique Paper ID: 61005
Publication Volume & Issue: VOLUME 6 - 2026, ISSUE 1
Page(s): 52-56
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