Demonstration of a 40-dB side mode suppression ratio hybrid laser built through an FP-laser diode with an antireflection coating whose thickness was controlled by direct observation of the laser emission spectrum
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In this communication we demonstrate the implementation of an external cavity fiber grating laser with a side mode suppression ratio higher than 40 dB utilizing a Fabry-Perot laser diode with a facet containing an antireflection coating which thickness is controlled by a technique allowing the direct observation of the laser resonance behavior during the application process.
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