Changjian Xie

Title: Changjian Xie: Innovator in Wavelength Division Multiplexing

Introduction

Changjian Xie is a prominent inventor based in Chengdu, China. He has made significant contributions to the field of optical engineering, particularly in the development of advanced wavelength division multiplexing technologies. His innovative work has led to the creation of a unique device that enhances the efficiency of optical communication systems.

Latest Patents

Changjian Xie holds a patent for a super-compact arrayed waveguide grating (AWG) wavelength division multiplexer based on a sub-wavelength grating. This multiplexer includes an input waveguide, a first planar waveguide, an arrayed waveguide, a second planar waveguide, and an output waveguide that are sequentially connected. The input waveguide has one port, while the output waveguide features eight ports. The arrayed waveguide consists of 50 equivalent uniform strip waveguides, each configured as a sub-wavelength grating structure. This design results in an increased group refractive index or transmission delay due to the slow light effect. The device supports eight channels with a channel spacing of 200 GHz and achieves a minimum adjacent channel crosstalk of less than −27 dB. Remarkably, the overall size of the multiplexer is within 300×230 μm, significantly reducing the integration size of the device.

Career Highlights

Changjian Xie is affiliated with Southwest Jiaotong University, where he continues to advance research in optical technologies. His work has garnered attention for its practical applications in telecommunications and data transmission.

Collaborations

Changjian has collaborated with notable colleagues, including Xihua Zou and Xiaojun Xie, contributing to the advancement of optical engineering research.

Conclusion

Changjian Xie's innovative contributions to wavelength division multiplexing technology exemplify the impact of research and development in optical communication systems. His work continues to influence the field and pave the way for future advancements.