Related Experiment Video
Updated: Jun 7, 2026
09:57
Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
Parametric study of an excimer-pumped, nitrogen Raman shifter for lidar applications
Applied Optics
|November 6, 2010
Summary
A krypton fluoride (KrF) excimer laser efficiently Raman shifted nitrogen gas for solar-blind lidar applications. High conversion efficiencies were achieved, though KrF laser beam quality limited maximum performance.
Area of Science:
- Laser physics
- Atmospheric remote sensing
- Nonlinear optics
Background:
- Raman lidar systems require efficient wavelength conversion for solar-blind operation.
- Nitrogen Raman shifters are crucial components for generating specific UV wavelengths.
- Excimer lasers offer high-power pumping for nonlinear optical processes.
Purpose of the Study:
- Investigate a krypton fluoride (KrF) excimer-pumped nitrogen Raman shifter for solar-blind lidar.
- Optimize conversion efficiency and understand wavelength-dependent effects.
- Compare KrF-pumped systems with traditional Nd:YAG-pumped Raman shifters.
Main Methods:
- Studied a KrF excimer laser pumping a nitrogen Raman shifter.
- Investigated both oscillator-amplifier and self-seeded configurations.
- Examined wavelength-dependent effects using a Nd:YAG laser at 532 nm and 266 nm.
Main Results:
- Achieved first Stokes conversion efficiencies up to 12% (248 nm to 263 nm) in N2:He mixtures.
- Observed wavelength-dependent effects influencing conversion efficiency.
- Identified KrF laser beam quality as a limiting factor for maximum efficiency.
Conclusions:
- KrF excimer-pumped nitrogen Raman shifters show promise for solar-blind lidar.
- Optimizing KrF laser beam quality is critical for maximizing Raman conversion efficiency.
- KrF systems offer an alternative to Nd:YAG lasers for specific lidar applications.
Related Concept Videos
01:26Raman Spectroscopy Instrumentation: Overview
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
01:20Raman Spectroscopy: Overview
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...