Patent ID: 6574262
Filing Date: 2003-06-03
Classification: H01S

Abstract:
A large area single mode (LASM) laser system comprising:a laser having a gain region of predetermined area defined by a generally horizontal gain width and generally vertical waveguide width and including a gain medium, and being operable in spontaneous emission mode and causing an optical signal to propagate in a propagation direction; a first lens located downstream from said laser in the propagation direction, said first lens being a unitary cylindrical lens, for focusing said optical signal in a generally vertical direction and in a direction opposite of the propagation direction; a second unitary lens located downstream from said first lens in the propagation direction and for collimating said optical signal in a generally horizontal direction and in a generally vertical direction in a direction opposite of the propagation direction; and a single-mode fiber-optic cable located downstream from said second unitary lens in the propagation direction and having a fiber grating for reflecting a single-mode of said optical signal in a direction opposite of the propagation direction, said reflected single-mode of said optical signal facilitating single-mode operation of said laser.