Mehrdad Givehchi

Title: Innovations by Mehrdad Givehchi in Optical Receiver Technology

Introduction

Mehrdad Givehchi is an accomplished inventor based in Boston, MA, known for his contributions to optical communication technologies. He has developed innovative methods that enhance the performance of optical receivers, which are crucial for modern communication systems.

Latest Patents

One of his notable patents is titled "Methods and apparatus for dynamic threshold setting for an optically amplified receiver." This patent describes an optical receiver circuit that includes a differential limiter amplifier. The amplifier receives a binary electrical waveform generated by an optical-to-electrical converter that processes an optical communications signal. The invention features low-pass filter circuits that are coupled to the differential outputs of the limiter amplifier to obtain the average DC values of the mirror-image output signals. The outputs from these low-pass filter circuits are then provided to a differential amplifier to determine the difference between these average DC values. The output of the differential amplifier is sent to an integrator circuit, which establishes a switching threshold for distinguishing logic "0"s from logic "1"s in the received data signal. This threshold is automatically adjusted in response to varying operational conditions, such as changes in the received optical signal power. Additionally, set point adjustment circuitry provides a variable set point input to the integrator circuit to minimize the effects of noise in the received optical signal. The receiver circuit can also be integrated with error-detection and performance monitoring circuitry to characterize the sensitivity of error performance to the value of the switching threshold.

Career Highlights

Mehrdad Givehchi is currently associated with Sycamore Networks, Inc., where he continues to innovate in the field of optical communications. His work has significantly contributed to advancements in the efficiency and reliability of optical networks.

Collaborations

Due to space constraints, the collaborations section will be omitted.

Conclusion

Mehrdad Givehchi's innovative work in optical receiver technology exemplifies the importance of advancements in communication systems. His contributions are vital for enhancing the performance and reliability of optical networks.