Wavelength-selective laser beam splitter
AssigneeJDS Uniphase Corporation
InventorsLi Wu, Yinglong Lin
Life of this patent
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Abstract
A beam splitting device for laser field is useful to spatially separate a laser beam created in the process of frequency doubling or three-wave mixing, into sub-beams according to wavelength and polarization state. The device has an optical retarder for wavelength-selective polarization rotation of the laser light, followed by a Wollaston prism and optionally a dual wedge prism to create parallel spatially separated sub-beams. Alternatively, two Wollaston prisms can be arranged to create two parallel spatially separated beams after the polarization rotation.
Claims12
A laser beam splitting device for spatially separating a laser light beam having two or more wavelengths, the device comprising:
- a wavelength-selective polarization rotating means disposed in the path of the laser light beam having two or more wavelengths for imparting a different polarization direction to different wavelengths of the light beam thus forming two or more sub-beams of light having a different polarization characteristics, and
- a means disposed in the path of the sub-beams of light for spatially separating the sub-beams of light according to their polarization characteristics.
Dependencies are inferred from the claim text.