Abstract

Common methods for frequency stabilizing diode lasers systems employ gratings,^[1] etalons,^[2] interference filters^[3] or complex optoelectronic feedback loops.^[4] Our method Faraday Anomalous Dispersion Optical Transmitter (FADOT) laser locking first reported at CLEO ’90^[5] is much simpler than other schemes. The FADOT uses commercial laser diodes with no antireflection coatings, an atomic Faraday cell with a single polarizer, and output coupler to form a compound cavity. This method is vibration insensitive, thermal expansion effects are minimal and has a frequency pull in range of 443.2 GHz (9Å). Our technique is based on the Faraday Anomalous Dispersion Optical Filter.^[6] This method has potential uses for optical communication, remote sensing, and pumping laser excited optical filters. We report on our computer model and compare the calculations to our experimental results.

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