Thermal Design Strategies for Optical Waveguides and Fiber Bragg Gratings

ALI DAW; Marai M Abousetta

doi:10.65405/fdjcpr96

المؤلفون

ALI DAW Libyan Academy for Graduate Studies Tripoli – Libya ,School Of Applied Sciences and Engineering ,Electrical and Computer Engineering Department Microwave and Communication Engineering Branch Author
Marai M Abousetta Libyan Academy for Graduate Studies Tripoli – Libya ,School Of Applied Sciences and Engineering ,Electrical and Computer Engineering Department Microwave and Communication Engineering Branch Author

DOI:

https://doi.org/10.65405/fdjcpr96

الكلمات المفتاحية:

Optical waveguides, Fiber Bragg Grating (FBG), Dense Wavelength Division Multiplexing (DWDM), thermal compensation, MATLAB simulation, negative thermo-optic coefficient, silicone resin, PMMA, SU-8 polymer, liquid carbon coating

الملخص

This paper presents a comprehensive numerical analysis and MATLAB-based simulation framework for evaluating thermal compensation strategies in optical waveguides and Fiber Bragg Gratings (FBGs) for Dense Wavelength Division Multiplexing (DWDM) systems. Building upon the analytical frameworks established in recent literature, we develop a generalized simulation environment that models temperature-induced wavelength drift in both silica-based AWGs and FBGs, incorporating negative thermo-optic coefficient materials (silicone resin, PMMA, SU-8 polymer) and negative thermal expansion coatings (liquid carbon). The simulation implements the fundamental temperature-dependent wavelength shift equation:

and extends it to model multi-layer compensation structures. Our results demonstrate that optimized passive compensation can reduce thermal drift from 10 pm/°C to 0.32-0.83 pm/°C, representing a 92-97% improvement. The MATLAB code provides a versatile tool for designing athermal components with specified temperature range requirements (-40°C to +85°C) and channel spacing constraints (12.5 GHz and 6.25 GHz). Key findings include: (1) the optimal silicone resin wedge angle for AWG compensation is 4.2° ± 0.3°, (2) PMMA-clad silicon nitride microring resonators achieve thermal drift below 2.0 ± 0.1 pm/K over 15-70°C, and (3) liquid carbon-coated FBGs demonstrate 90.5% reduction in thermal drift. The simulation framework enables rapid prototyping of athermal designs and provides design guidelines for next-generation ultra-dense WDM systems targeting 6.25 GHz channel spacing.

التنزيلات

تنزيل البيانات ليس متاحًا بعد.

المراجع

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