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High-efficiency joule-level Raman generation in Pb vapor
Optics Letters
|August 28, 2009
Summary
Researchers achieved high-energy blue-green laser output using Raman shifting of an injection-locked XeCl laser in lead vapor. This demonstrates a promising pathway for efficient blue-green laser generation with potential for over 1.4% efficiency.
Area of Science:
- Laser Physics
- Nonlinear Optics
- Atomic Vapor Lasers
Background:
- High-power blue-green lasers are crucial for various applications, including remote sensing and underwater communications.
- Raman shifting offers a method to convert existing laser wavelengths to desired spectral regions.
- Lead (Pb) vapor is an effective medium for efficient Raman conversion of UV laser sources.
Purpose of the Study:
- To demonstrate efficient blue-green radiation generation via Raman shifting of an injection-locked XeCl laser.
- To investigate the energy conversion efficiency of the XeCl/Pb Raman laser system.
- To assess the potential for high overall laser efficiency in this system.
Main Methods:
- Utilizing an injection-locked XeCl laser operating in the ultraviolet (UV) spectrum.
- Employing lead (Pb) vapor as the Raman gain medium.
- Measuring the output energy and spectral characteristics of the generated blue-green radiation.
Main Results:
- Achieved nearly 1 Joule of blue-green radiation output.
- Generated radiation in 60-nanosecond (nsec) pulses.
- Observed a 50% Raman energy conversion efficiency in both oscillator and oscillator-amplifier configurations.
Conclusions:
- The XeCl/Pb system demonstrates a viable route for efficient blue-green laser generation.
- The high conversion efficiency suggests a potential for exceeding 1.4% overall XeCl/Pb blue-green laser efficiency.
- Further optimization could lead to practical high-energy blue-green laser sources.
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