Mid-infrared (MIR) technologies are crucial for applications ranging from chemical sensing to precision medical surgery. Effective polarization control is essential to enhance the functionality of fiber systems. Current solutions for polarization control in the MIR primarily involve free-space devices and components. In this project, we take a step forward and experimentally demonstrate polarization conversion within soft glass fluoride and chalcogenide fibers using a commercially available in-line polarization controller (PC). Our experiments using a single PC show a polarization extinction ratio (PER) of 20.7 dB in a ZBLAN fiber with a coating of urethane acrylic resin. Cascading two PCs enhances the PER to 39.1 dB while reducing the required compressive force and, thus, increasing the fiber lifetime. Chalcogenide fibers (As2Se3, As2S3, Ge20Se60Te20) are coated with polymethyl methacrylate (PMMA) and tested using a single PC. Thanks to the higher strain optic coefficients of chalcogenide glass, these fibers exhibited exceptional PER values, reaching 39.3 dB for As2Se3, 41.4 dB for As2S3, and 38.3 dB for Ge20Se60Te20. The polymer coatings of the ZBLAN and chalcogenide fibers effectively protect them from compressive force and twisting, enabling them to endure more than 30 cycles of compression and decompression without breakage. Stability test conducted over 12 hours with ZBLAN fiber demonstrated that the achieved polarization state remains stable, with maximum deviations due to environmental factors estimated to be less than 2%. This work is the first proof that in-line polarization control using soft glass fibers is achievable, paving the way toward developing all fiber MIR devices and systems.

To learn more about the published works, please click here.

This project focuses on the design of highly sensitive and fabrication-friendly surface plasmon resonance (SPR)–based photonic crystal fiber (PCF) sensors for multi-parameter sensing applications. Although many existing PCF-SPR sensors demonstrate high sensitivity, they often suffer from high confinement loss, complex geometries, or limited fabrication tolerance. The primary objective of this work was to minimize these trade-offs by developing simple yet high-performance sensor designs.

Several PCF structures were designed and analyzed using COMSOL Multiphysics based on the finite element method (FEM). All designs follow stack-and-draw compatible geometries, ensuring practical feasibility for real-world fabrication. Strategic arrangements of circular air holes inside the fiber core enable controlled light leakage, allowing strong interaction between the guided optical modes and the surrounding plasmonic materials.

In this project, we have implemented a calculator in 8051 microcontrollers, which can add, subtract, multiply and divide two inputs (4 digits each i.e. 16 binary bits). The inputs will be given from the keypad and the result will be displayed on the LCD. This calculator is able to show negative results in the case of subtraction. The programming was done in Assembly language using MIDE-51. The code was tested in Proteus first and then it was implemented in the hardware kit. We developed this calculator project in our 6th semester of IUT in October 2019. To access the project files, click here.

Watch the YouTube video on the left to know more about this project.

In this project, we have designed a system that measures the power factor of an AC system having inductive loads and displays it on an LCD. The system then automatically tries to improve the power factor of the system using capacitor banks if the power factor value is found to be less than a preset value. The improvement continues until the power factor is above a predetermined value. This is a simulation-based project and we simulated the system in Proteus using the Arduino module. This project was developed in our 6th semester of IUT in October 2019. 

To know more about this project, please watch the video on the left or just click here.

Access the project files from this link.

A simple calculator is programmed in MATLAB, which can be operated by voice input commands and the audio of the result will be played digit by digit. This project can help blind & disabled people to do calculations using voice commands and hear the result. The program records the user voice input and matches it with the predefined voice references using cross-correlation. After detection, the user command is executed and the result is displayed.

Please watch the YouTube video on the left to see the outcome of this project.

Know more about this project by clicking here.

To access the project files, click here.

We developed a system using MATLAB GUI that will help in taking orders and generating bills for a restaurant easily. The System has an interface that has options for choosing different food items and the quantity of those items. At the press of a button, the system will show the bill for the selected food items. The system will also generate token/serial numbers for the customers. Also, there is a calculator to find out the amount of return money.

Know more about this project by clicking here.

To access the project files, click here.

We have designed 4-bit ALU (arithmetic logic unit) in Proteus using basic logic gates. Our designed ALU can perform addition, subtraction, multiplication, and division operation between two 4-bit inputs.

The "Adder-Subtractor", "Multiplier" and "Divider" circuits were tested in Proteus first. Then they were implemented in hardware using PCB and basic logic gate ICs.

To access the project files, click here.