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Updated: Feb 6, 2026

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
Published on: September 7, 2022
Eye-safe fiber laser for long-range 3D imaging applications
This study presents a compact all-fiber Er/Yb laser amplifier for 3D imaging. The system achieves high pulse energy and excellent beam quality, making it suitable for field applications like lidar.
Area of Science:
- Fiber laser technology
- Optical engineering
- Remote sensing
Background:
- High-energy, high-beam-quality fiber lasers are crucial for advanced applications.
- Existing systems often suffer from complexity and limited field deployability.
Purpose of the Study:
- To develop a robust and efficient all-fiber Er/Yb master oscillator power amplifier (MOPA) at 1.55 μm.
- To demonstrate its suitability for long-range 3D imaging and lidar applications.
Main Methods:
- Utilized an Er/Yb gain medium in an all-fiber MOPA configuration.
- Employed a high-power distributed-feedback laser diode as the seed source.
- Investigated performance metrics including pulse energy, duration, repetition frequency, amplified spontaneous emission, and beam quality.
Main Results:
- Achieved 135 μJ pulse energy with 6 ns duration at 100 kHz repetition frequency.
- Obtained excellent beam quality (M²=1.1) with <1% amplified spontaneous emission.
- Demonstrated a simplified two-stage amplification process with 29% optical-to-optical efficiency.
Conclusions:
- The developed all-fiber Er/Yb MOPA offers a low-complexity, high-performance solution for 3D imaging.
- Its robust, alignment-free design and long-range capabilities are ideal for field deployment in scanning lidar systems.
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