研究目的
To construct a theoretical model to describe the electro-optic modulator with alignment errors and quantitatively analyze the distribution characteristics of the exiting intensity of the electro-optic modulator under different alignment errors and different applied voltages.
研究成果
The theoretical model for the electro-optic modulator with three kinds of alignment errors is established, providing guidance in aligning the modulators. The distribution characteristics of the exiting intensity are useful for precise alignment in practical applications. Experimental results agree well with theoretical predictions, validating the model.
研究不足
The study focuses on the alignment errors of the electro-optic modulator and their impact on the exiting intensity. It does not explore other potential sources of error or the modulator's performance under extreme conditions.
1：Experimental Design and Method Selection:
The study uses a theoretical model to describe the electro-optic modulator with alignment errors, dividing them into horizontal, vertical, and rotation errors. It employs three-dimensional polarization ray tracing calculus to analyze the exiting intensity.
2：Sample Selection and Data Sources:
A z-cut lithium niobite (LN) crystal is chosen as the electro-optical material. The dimension of the LN crystal is 9 mm × 9 mm × 18.8 mm (x × y × z).
3：8 mm (x × y × z).
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A polarizer and an analyzer are placed on both sides of the lithium niobate crystal. A collimated laser beam is produced by a 660-nm-wavelength diode laser and corresponding collimator.
4：Experimental Procedures and Operational Workflow:
The laser beam is focused onto the entrance interface of the LN crystal by lens 1 which is confocal with lens 2. The laser beam exiting from the LN crystal is collimated by lens 2 and then propagates through the analyzer. The exiting laser beam is received by the camera.
5：The laser beam exiting from the LN crystal is collimated by lens 2 and then propagates through the analyzer. The exiting laser beam is received by the camera.
Data Analysis Methods:
5. Data Analysis Methods: The distribution characteristics of the exiting intensity are analyzed under different alignment errors and different applied voltages.
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