Patent ID: 6567453
Filing Date: 2003-05-20
Classification: H01S

Abstract:
A solid-state laser oscillator comprising:at least two solid-state laser rods disposed coaxially in series with each other, radiating light when excited, and amplifying the light through stimulated emission, wherein a heat lens is generated when excited; at least one solid-state laser rod exciting device, exciting said solid-state laser rods; at least one 90Â° optical rotator disposed coaxially with said solid-state laser rods, arranged between any number of said solid-state laser rods, and rotating a component of the light generated in the axial direction; at least one heat lens compensating device disposed coaxially with said solid-state laser rods and located at any position; at least one reflecting device and at least one partial reflection device, disposed coaxially with said solid-state laser rods, for generating a laser light by propagating the axially generated component of the light where said at least one heat lens compensating device, at least one optical rotator, solid-state rods, and at least one exciting device lie coaxially between said reflecting device and said partial reflection device; and an exciting source driving device, driving exciting sources included in said solid-state laser rod exciting device by a driving current, wherein the driving current are controlled on the basis of increase and decrease of said heat lens due to a change of said laser light.