Sample interview questions: How would you approach designing a laser system for scientific research in laser materials processing?
Sample answer:
Laser System Design for Scientific Research in Laser Materials Processing
1. Identify Research Objectives
- Determine specific experimental requirements, such as wavelength, power density, and pulse characteristics.
- Establish measurement techniques and data analysis methods.
2. Laser Source Selection
- Consider available laser technologies (e.g., solid-state, fiber, excimer).
- Evaluate parameters such as wavelength, power, and beam quality.
- Explore the trade-offs between different laser types and their suitability for the research objectives.
3. Beam Shaping and Delivery
- Determine appropriate beam shaping optics (e.g., lenses, mirrors, beam expanders).
- Design beam delivery systems to efficiently direct the laser beam to the sample.
- Consider the effects of beam propagation and distortion.
4. Sample Interaction
- Analyze laser-material interactions for the specific research topic.
- Determine optimal laser parameters (e.g., pulse energy, repetition rate) based on material properties.
- Develop experimental protocols to control and monitor the interaction process.
5. Data Acquisition and Analysis