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Improved Monoblock laser brightness using external reflector
Applied Optics
|March 26, 2014
Summary
Researchers developed a simple method to reduce Monoblock laser beam divergence. This technique significantly improves beam quality for eye-safe laser range finders.
Area of Science:
- Optics and Photonics
- Laser Technology
Background:
- Monoblock lasers are preferred for long-range, eye-safe laser range finders due to their 1570 nm emission, high pulse energy, and efficiency.
- Standard Monoblock lasers exhibit significant beam divergence (10-12 mrad), necessitating reduction for precise applications.
Purpose of the Study:
- To present a compact and effective technique for reducing Monoblock laser beam divergence.
- To enhance the beam quality of Monoblock lasers for improved performance in range-finding applications.
Main Methods:
- A simple technique employing a partial reflector placed near an optical parametric oscillator (OPO) was utilized.
- Experiments were conducted using a 38 mm Monoblock laser and a 10 mm potassium titanyl phosphate (KTP) OPO.
Main Results:
- A beam divergence of less than 4 mrad was achieved, representing a >2.5x reduction compared to the unmodified laser.
- The study investigated the impact of varying feedback and etalon spacings on performance.
Conclusions:
- The presented partial reflector technique offers a straightforward and compact solution for reducing Monoblock laser beam divergence.
- This method enhances the suitability of Monoblock lasers for applications requiring high beam quality and precision.
