Mode hopping in single-mode microchip Nd:YAG lasers induced by optical feedback

This paper demonstrates the influence of external optical feedback on the polarization state of longitudinal modes in quasi-isotropic microchip Nd:YAG lasers. Under optical feedback, the polarization state of longitudinal modes in quasi-isotropic lasers relies strongly on the intracavity anisotropy loss and mode competition. When the intracavity anisotropy loss is small, external optical feedback can cause polarization switching and strong mode competition between two orthogonal linearly polarized eigenstates of one laser longitudinal mode, which leads to the distortion of laser intensity modulation waveform. The polarization switching is independent of the initial external cavity length. By increasing the intracavity anisotropy loss, one polarization eigenstate can be suppressed and the laser works in singlepolarization state. A theoretical analysis based on the compound cavity model is presented, which is in good agreement with the experimental results. The results offer guidance to the development of laser feedback interferometers.

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Mode hopping in single-mode microchip Nd:YAG lasers induced by optical feedback

Cited by 5 publications

References 15 publications

Optical Feedback Effects in Orthogonally Polarized Lasers

Optical Feedback Effects in Orthogonally Polarized Lasers

Intensity modulation and multi modes hopping induced by phase change in external cavity Nd:YAG lasers

Polarization switching in a quasi-isotropic microchip Nd:YAG laser induced by optical feedback

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