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Phase-Conjugate External-Cavity Diode Laser

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1 Author(s)
M. Vainio ; Metrol. Res. Inst., Helsinki

An external-cavity diode laser based on self-pumped phase-conjugate optical feedback is reported. An antireflection-coated diode laser is subjected to strong phase-conjugate feedback from a photorefractive Ce-doped BaTiO3 crystal. This provides narrow laser linewidth and good stability. Inherent linewidth of 25 kHz and relative frequency stability of 1.5times10-8 (at 100 s) are demonstrated. Due to phase-conjugate feedback, the laser is insensitive to mechanical drifts and misalignment of the feedback element

Published in:

IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 19 )