Applied Optics Laboratory started with the study in fiber gratings. Especially, cascaded Long-Period fiber Gratings (LPG) have been the main scope of the Lab. With the fiber gratings, we have measured the properties of various fibers and fiber modes. We are struggling to be able to design, analyze, and fabricate state-of-art fiber gratings for DWDM and sensor systems, which include apodizing, chirping, and cascading techniques. Fabricating and modeling of Photonic Crystal Fibers (PCF) now became one of the major interesting fields of our Lab. The recent research scope has been expanded up to bio-medical optics. We have implemented the Optical Coherence Tomography (OCT) system that is possible real-time cross-sectional imaging of a living tissue with sub-micrometer resolution. We have developed TD (Time Domain) OCT, SD (Spectral Domain) OCT, FF (Full-Field) OCT systems and FD (Fourer Domain) OCT, Optical Doppler Tomography (ODT) systems are designing and under development. 

 

Photonic Crystal Fibers (PCF)
- OCDMA using Long-Period Fiber Gratings (LPGs) pdf
- Lens-Free Optical Fiber Connector based on LPGs pdf
- Apodization and Chirped LPG
- Fiber Grating Sensor System pdf
- Fabrication and Analysis of Photonics Crystal Fiber
Optical Coherent Tomography (OCT)
- Fiber based OCT system implementation ppt 

SoongHo Park, Juhyung Lee, Younggue Kim, Byeong Ha Lee
Nanometer-Scale Vibration Measurement Using an Optical Quadrature Interferometer based on 3×3 Fiber-Optic Coupler
Sensors, 2020, Vol. 20, No. 9, pp. 2665~ 0

Juhyung Lee, Taeil Yoon, Byeong Ha Lee
Post-Processing Method for Image Reconstruction Enhancement in Integrating-Bucket-Based Full-Field Optical Coherence Tomography
Applied Sciences, 2020, Vol. 10, No. 3, pp. 830~ 0

Kwan Seob Park, Ju Wan Kim, Byeong Ha Lee, Tae Joong Eom
Angiographic Imaging of an In Vivo Mouse Brain as a Guiding Star for Automatic Digital Refocusing in OCT
Applied Sciences, 2020, Vol. 10, No. 4, pp. 1210~ 0