Chia-Ming Chang

Title: Innovations of Chia-Ming Chang

Introduction

Chia-Ming Chang is a notable inventor based in Matawan, NJ (US), recognized for his contributions to the field of photonics and optoelectronics. He holds two patents that showcase his innovative approach to integrating optical components and enhancing signal processing.

Latest Patents

One of his latest patents is a photonic integrated circuit using chip integration. This invention involves a photonic integrated circuit (PIC) that features a first photonic chip and a second photonic chip bonded and optically coupled to each other. This design reduces the number of different photonic chips needed in the same PIC package to achieve a desired electro-optical function. The first photonic chip includes active optical components, such as lasers and optical amplifiers, fabricated using III-V semiconductor technology. The second photonic chip contains additional optical components, including modulators, photodetectors, and passive optical components, fabricated using CMOS technology. This innovative design also incorporates 2×2 optical couplers to appropriately redirect various optical signals between the two chips.

Another significant patent by Chia-Ming Chang is an optoelectronic equalizer circuit. This circuit is configurable to operate as a finite impulse response (FIR) filter, where the tapping and weighting of the signal are performed in the optical domain. The summation of the weighted signals occurs in the electrical domain after converting the corresponding optical signals into electrical form using an array of photodetectors. The arrangement of photodetectors allows for some to contribute positively and others negatively to the equalized electrical signal, enabling variable tap weights between positive and negative values.

Career Highlights

Chia-Ming Chang is currently employed at Alcatel-Lucent USA Inc., where he continues to develop innovative technologies in the field of photonics and optoelectronics. His work has significantly impacted the advancement of integrated optical systems.

Collaborations

Chia-Ming Chang has collaborated with notable coworkers, including Jeffrey H. Sinsky and Guilhem De Valicourt, contributing to various projects and innovations in his field.

Conclusion

Chia-Ming Chang's contributions to photonics and optoelectronics through his patents reflect his innovative spirit and dedication to advancing technology. His work continues to influence the industry and inspire future developments.