Related Experiment Video
Updated: Jun 16, 2026
11:20
Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Summary
A CO(2) laser plasma unexpectedly exhibits a significant lensing effect, impacting optical resonator stability. Optimizing laser output involves balancing plasma lens focal power with mirror curvature.
Area of Science:
- Optics and Photonics
- Plasma Physics
- Laser Engineering
Background:
- The lensing effect of carbon dioxide (CO(2)) laser plasma was previously considered negligible.
- Unexpected experimental observations revealed a significant focal length associated with this plasma.
Purpose of the Study:
- To investigate the lensing effect of CO(2) laser plasma.
- To determine the focal length and stability conditions of an optical resonator containing a plasma lens.
- To express these parameters in terms of plasma and resonator characteristics.
Main Methods:
- Experimental observation of the plasma lensing phenomenon.
- Theoretical analysis to determine focal length and stability conditions.
- Mathematical modeling relating plasma and resonator characteristics to electrical power dissipation.
Main Results:
- A CO(2) laser plasma lens exhibits a focal length on the order of -20 m.
- The semiconfocal resonator configuration is identified as the most unstable for frequency-stabilized lasers.
- Plasma and resonator characteristics, along with dissipated electrical power, influence focal length and stability.
Conclusions:
- The lensing effect of CO(2) laser plasma is significant and must be considered in laser design.
- Optimal CO(2) laser configuration for maximum output power is achieved when the plasma lens's negative focal power compensates for the curved mirror's positive focal power.
- Understanding plasma lensing is crucial for advanced laser resonator design and stability.
Related Concept Videos
01:16Confocal Fluorescence Microscopy
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
01:19Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.