Sample interview questions: How would you approach designing a laser system for holography applications?
Sample answer:
Design Considerations for a Holographic Laser System
Laser Source:
- Select a continuous-wave (CW) laser with high coherence and low noise for stable and high-quality holograms.
- Consider the desired wavelength and power requirements for the specific holographic application.
- Use a He-Ne laser (633 nm) for visible holograms or an Ar-ion laser (514.5 nm) for UV holograms.
Optical System:
- Design a collimated laser beam to create a uniform illumination across the recording medium.
- Use a beam splitter to separate the reference and object beams.
- Control the intensity ratio between the reference and object beams for optimal hologram formation.
- Optimize the path length difference between the reference and object beams for the desired hologram reconstruction distance.
Recording Medium:
- Select a holographic recording medium with high resolution and sensitivity to the laser wavelength.
- Consider using photochromic glass, silver halide emulsions, … Read full answer