P Balling 2001 Metrologia 38 297 doi:10.1088/0026-1394/38/4/2
P Balling
Show affiliationsWe describe a simple method for measuring the amplitude of a laser's frequency modulation by counting the beat-frequency signal against an unmodulated reference laser. This method is useful in the case of the third-harmonic detection technique with 633 nm He-Ne/I2 lasers. The estimated uncertainty of less than 1 part in 103 is much better (by at least a factor of 50) than that obtained using a radio-frequency (rf) spectral analyser.
42.60.Fc Modulation, tuning, and mode locking
42.55.Lt Gas lasers including excimer and metal-vapor lasers
Issue 4 (August 2001)
P Balling 2001 Metrologia 38 297
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