Thermal lens of controlled ellipicity

Details Thermal lens of controlled ellipicity Thermal lens of controlled ellipicity

1994-02-04

1996-10-01

Ben, Loha

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359246, 359290, 372 19, 372 34, 372 41, 372 69, 372 71, G02F 101

Patent

active

055615473

ABSTRACT:
The ellipticity of a thermal lens is controlled in a diode-pumped anisotropic crystal, such as Nd:YVO4. The crystal has two opposing optical end faces through which a pump beam and an output beam pass. The crystal also has opposing "c" axis crystal faces normal to a "c" axis of the crystal, and opposing "a" axis crystal faces that are normal to an "a" axis of the crystal. A mount supports the crystal and serves as a heat sink. A path is created to conduct heat from the crystal through the "c" faces, while the "a" faces are thermally isolated from heat conduction. The thermal lens ellipticity is controlled in order to produce a round, diffraction limited gaussian beam suitable for applications that require a high power, good quality beam from a simple, reliable laser source.

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Plaessmann, H. et al., "Multipass Diode-Pumped Solid-State Optical Amplifier", Optics Letters, vol. 18, No. 17, pp. 1420-1422, Sep. 1, 1993.

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