Detection of CO2-laser power variations via plasma tube impedance changes
Abstract
A method is described for detection of CO2-laser power variations which requires no optical detector. It is based on plasma-tube impedance changes induced by the laser power flow within the cavity. A constant-current high-voltage power supply and a special equalizer are necessary to obtain a voltage proportional to the laser power. Details for the design of the equalizer are given. The detection scheme works for frequencies up to about 5 kHz and can be used for laser frequency stabilization or signature analysis.
- Publication:
-
Applied Physics
- Pub Date:
- April 1980
- DOI:
- 10.1007/BF00895933
- Bibcode:
- 1980ApPhy..21..407S
- Keywords:
-
- Carbon Dioxide Lasers;
- Gas Discharge Tubes;
- Impedance Measurement;
- Laser Outputs;
- Power Spectra;
- Electrical Impedance;
- Equalizers (Circuits);
- High Voltages;
- Transfer Functions;
- Lasers and Masers;
- PACS 42.55 - 52 - 85.60;
- 42.55;
- 52;
- 85.60