Polarization and wavelength stable superfluorescent sources

H - Electricity – 01 – S

Patent

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H01S 3/067 (2006.01) G01C 19/72 (2006.01) G02B 6/293 (2006.01) H01S 3/094 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2343147

The instability of the mean wavelength of a superfluorescent fiber source (SFS) is reduced by randomizing the polarization of light from a pump source or by using polarization maintaining components. In one embodiment, the polarization of a pump source is made more random, leading to greater stability of the mean wavelength of the SFS, with an output mean wavelength that is stable to better than 3 ppm for full rotation of the pump polarization state. In another embodiment, the polarization of optical radiation throughout the device is kept substantially constant by using polarization maintaining fiber and components, thereby leading to enhanced mean wavelength stability of the SFS.

L'instabilité de la longueur d'onde moyenne d'une source de fibre superfluorescente (SFS) est réduite par randomisation de la polarisation de la lumière d'une pompe-source ou par l'utilisation d'éléments stabilisateurs de polarisation. Selon un premier mode de réalisation, la polarisation d'une pompe-source est rendue plus aléatoire, garantissant ainsi une meilleure stabilité de la longueur d'onde moyenne de la SFS. Pour une rotation complète de l'état de polarisation de la pompe, la longueur d'onde moyenne obtenue ne varie pas de plus de 3 ppm. Selon un autre mode de réalisation, la polarisation des rayons optiques qui passent à travers le dispositif est maintenue quasiment constante par l'utilisation de fibres et d'éléments stabilisateurs de polarisation, ce qui permet d'améliorer la stabilité de la longueur d'onde moyenne de la SFS.

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