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Compact flexible multi-pass rotary delay line using spinning micro-machined mirrors.
Roland Fleddermann1,2, Woei Ming Lee3, Keshu Huang1
1Department of Quantum Science, Centre for Gravitational Physics, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia.
Scientific Reports
|August 26, 2017
Summary
We developed a novel method for rotary delay-lines using a multi-segmented mirror, achieving high duty cycles and repetition rates. This technique enhances path length tunability for advanced optical systems.
Area of Science:
- Optics and Photonics
- Mechanical Engineering
- Microfabrication
Background:
- Rotary delay-lines are crucial for tunable optical systems.
- Existing methods face limitations in path length tunability and repetition rates.
Purpose of the Study:
- To introduce a new method for extending path length tunability in rotary delay-lines.
- To enhance duty cycle and repetition rates for improved optical system performance.
Main Methods:
- Utilizing a novel multi-segmented micro-machined mirror.
- Implementing serial injection of reflections onto separate mirror segments.
- Employing synchronous and asynchronous operation modes for tunability.
Main Results:
- Achieved a duty cycle exceeding 80% and repetition rates over 40 kHz.
- Experimentally demonstrated scan speeds up to 8 m/s with 42.7 kHz repetition rates.
- Numerical simulations suggest potential scan speeds of 80 m/s with 18 reflection points.
Conclusions:
- The proposed method significantly enhances path length tunability in rotary delay-lines.
- The system offers flexible control over repetition rate and scan depth through distinct operation modes.
- This advancement holds promise for high-speed, tunable optical applications.
