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  • 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper cj_p_59

Effect of polarization modulation on the stability of a 1.5 μm laser locked to a fibre cavity

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Abstract

We analyse limitations introduced by a fibre connectorised Lithium-Niobate electro-optic modulator which modulates the beam of a1.5 μm laser for frequency lock onto one mode of a fibre cavity. It is shown that the ellipticity and/or misalignment of the input polarization with the main axes of the modulator leads to a modulation of the output polarization. This results in two effects on the signal detected at the cavity output: an offset due to residual amplitude modulation (RAM) and a distortion due to the slight birefringence presented by the cavity. Both effects limit the stability of the frequency lock.

© 2019 IEEE

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