Holographic pump coupler and laser grating reflector

Details Holographic pump coupler and laser grating reflector Holographic pump coupler and laser grating reflector

2005-03-29

2009-06-02

Connelly Cushwa, Michelle R (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C359S015000, C359S024000

Reexamination Certificate

active

07542639

ABSTRACT:
In the present invention, a volume holographic optical element is used as a pump coupler. The holographic coupler allows at least one pump wavelength to be coupled into the laser medium. The direction of the pump beam onto the coupler is not co-linear with the direction of the signal beam out of the coupler. The invention further provides the coupling of more than one pump wavelengths using a single holographic coupler element while maintaining the high isolation between pump and signal beam. The invention further provides a narrow-band reflection grating of various efficiencies for the signal beam (as part of the laser cavity).

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