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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 26, Iss. 15 — Aug. 1, 2008
  • pp: 2764–2773

Dual-Frequency Laser at 1.5 µm for Optical Distribution and Generation of High-Purity Microwave Signals

Grégoire Pillet, Loïc Morvan, Marc Brunel, Fabien Bretenaker, Daniel Dolfi, Marc Vallet, Jean-Pierre Huignard, and Albert Le Floch

Journal of Lightwave Technology, Vol. 26, Issue 15, pp. 2764-2773 (2008)


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Abstract

We describe the stabilization of the beatnote of an Er,Yb:glass dual-frequency laser at 1.5 µm with and without an external microwave reference. In the first case, a classical optical phase-locked loop (OPLL) is used, and absolute phase noise levels as low as -117 dBrad2/Hz at 10 kHz from the carrier are reported. In the second case one or two fiber-optic delay lines are used to lock the frequency of the beatnote. Absolute phase noise levels as low as -107 dBrad2/Hz at 10 kHz from the carrier are measured, fairly independant of the beatnote frequency varying from 2 to 6 GHz. An analysis of the phase noise level limitation is presented in the linear servo-loop theory framework. The expected phase noise level calculated from the measurement of the different noise sources fits well with the predictions.

© 2008 IEEE

Citation
Grégoire Pillet, Loïc Morvan, Marc Brunel, Fabien Bretenaker, Daniel Dolfi, Marc Vallet, Jean-Pierre Huignard, and Albert Le Floch, "Dual-Frequency Laser at 1.5 µm for Optical Distribution and Generation of High-Purity Microwave Signals," J. Lightwave Technol. 26, 2764-2773 (2008)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-26-15-2764

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