Profile: Shenzhen City Garland Technology Co., Ltd Ltd is a manufacturer and supplier of fiber optic communication products. Our photonic depolarizer is an all-fiber lyot-type device producing pseudo-random polarization output with low degree of polarization (DOP). The depolarizer is a passive device utilizing the coherence properties of the source to randomize the state of polarization (SOP). Our fiber sensor interrogating system is a low-cost, high performance fiber Bragg grating (FBG) interrogation systems for various engineering and civil applications. It features compact size and PC-based large dynamic range sensors. The system includes an external device, PC-based application software and optional high performance laptop.