Abstract

Polarization spectroscopy is used to lock a frequency-doubled Ti:Sapphire laser to the 425.5 nm 7S3 → 7P40 transition of 52Cr. A Cr-He hollow cathode discharge cell is designed and fabricated to produce Cr atom vapor instead of a high temperature cell. Without any modulation devices or lock-in amplifiers, a high signal-to-background level polarization spectroscopy signal is obtained. Moreover, a frequency fluctuation of ±295 kHz for more than one hour is achieved.

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