研究目的
Developing and demonstrating a method for digital calibration of combined Mach-Zehnder interferometers to achieve high precision calibration into a maximum or a minimum of interference.
研究成果
The developed method for digital calibration of combined MZ interferometers is effective and can be applied to any application, including characterization of coherent transmitters. It ensures high precision calibration by maintaining collinearity between the electric field phasors of the interferometers.
研究不足
The method's accuracy may be affected by the instability of the phase around the null and the need for a good initial guess for faster convergence.
1：Experimental Design and Method Selection:
The method involves evaluating error functions for each of the combined interferometers in discrete space from a small number of measurements. Calibration is achieved by maintaining collinearity between the electric field phasor of the two interferometers.
2：Sample Selection and Data Sources:
The experimental demonstration was performed on a Lumentum InP coherent transmitter PIC, packaged into a Transmitter Optical Subassembly (TOSA).
3：List of Experimental Equipment and Materials:
Source measurement units providing the voltages and currents to the TOSA, controlled by a personal computer with the algorithm implemented in Python.
4：Experimental Procedures and Operational Workflow:
The algorithm starts with aligning I and Q to a maximum, treating the parent controls as a single MZ interferometer with an error function. The error functions for the I and Q MZs are generated at an initial guess for their respective differential voltage.
5：Data Analysis Methods:
The method relies on the orthogonality of functions to generate error functions for both I and Q simultaneously, significantly reducing the number of optical power readouts necessary for calibration.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
