Patent ID: 6966707
Filing Date: 2005-11-22
Classification: G02B,G11B

Abstract:
1. An optical pickup comprising: optical wiring consisting of: a semiconductor laser at a second end of the first optical fiber; an optical head at a second end of the second optical fiber, the optical head having at least an objective lens; and an optical detector at the second end of the second optical fiber; a first lens disposed between said semiconductor laser and a second end of the first optical fiber; and a second lens disposed between a polarized beam splitter and the second end of the second optical fiber, wherein an optical fiber module is constructed with said semiconductor laser and said optical wiring disposed such that a laser light beam emitted from said semiconductor laser is made to enter a second end of said first optical fiber, and said optical wiring directs the laser light beam emitted from said semiconductor laser into said optical head, wherein a polarized beam splitting element and a ¼ wavelength plate are disposed between said optical wiring and said objective lens, and wherein a cross section of the first core in said first optical fiber is made in one of an approximately elliptical, oval, or approximately rectangular shape, and a polarizing direction of the light beam emitted from said semiconductor laser approximately coincides with a direction of a major axis of the cross section of the first core in said first optical fiber.