Noise in Picosecond Laser Systems: Actively Mode Locked CW Nd3+:YAG and Ar+ Lasers Synchronously Pumping Dye Lasers
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In the interest of increasing the sensitivity of laser spectroscopy, investigators are utilizing high frequency modulation [1,2] and polarization  techniques. In the case of highresolution-high-frequency modulation laser spectroscopy, beating between the modulation side bands allows formidable sensitivity . In high frequency modulation pump-probe picosecond spectroscopy , the side bands produced are negligibly displaced relative to the laser spectral bandwidth; thus the carrier frequency (or sums and differences of carrier frequencies on different laser beams [4,5]) are detected directly.
KeywordsModulation Transfer Function High Frequency Modulation Synthesizer Frequency Fluctuation Spectrum Shot Noise Limit
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