Wide-bandwidth analog correlator and its application to mode-locked laser measurements
Abstract
A new instrument for the analog determination of correlation functions of wide-bandwidth signals is described and characterized. The instrument is comprised of microwave electronic components; a double-balanced mixer performs the multiplication operation involved in the correlation process, whereas a constant-impedance line stretcher introduces the variable delay. Measurements indicate that the correlator has a bandwidth of approximately 3 GHz. It is shown that this inexpensive and simple device can be used as a diagnostic tool for mode-locked argon-ion lasers when used in conjunction with a fast photodiode detector.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- August 1979
- DOI:
- Bibcode:
- 1979RScI...50..997R
- Keywords:
-
- Analog Circuits;
- Broadband;
- Correlators;
- Laser Mode Locking;
- Optical Measurement;
- Spectral Correlation;
- Argon Lasers;
- Autocorrelation;
- Dye Lasers;
- Microwave Circuits;
- Mixers;
- Performance Tests;
- Power Spectra;
- Schottky Diodes;
- Instrumentation and Photography;
- 42.60.By;
- 84.30.Wp;
- 85.90.+h;
- Design of specific laser systems;
- Other topics in electronic and magnetic devices and microelectronics