Method and device for coupling laser light derived from at least two laser sources into one optical fiber

摘要

The invention consists in passing a laser beam (3) from each of laser sources (1) through its individual first optical system (4), single reflecting this beam (3) from a substantially flat individual reflecting surface (7) towards an input facet (10′) and focusing this beam (3) by a second common optical system on the input facet (10′) of the fiber (10). The laser beams (3) are emitted by laser modules (1), each containing a single laser source in an individual housing (2) with a first optical system (4), fixed with respect to the housing (2). The housing (2) of each laser module (1) is mounted in a holder (17, 20). The second optical system (9) is placed directly in front of the input facet (10′) of the fiber (10). An axis (12) of each first optical system (3) forms with an axis (13) of the second optical system (9) an angle (α) ranging between 45 (α′) and 145 (α″) degrees. The individual reflecting surfaces (7) are either on the oblique truncations of rods (15, 19) placed parallel to the optical axis (13) of the second optical system (9) or on the lateral faces of the regular pyramid (8) with the number of sides of the pyramid base equal to the number of laser modules (1). Optical axis (13) of the second optical system (9) passes through the vertex and through the center of the base of this pyramid (8).

主权项

1. A method of coupling laser light derived from at least two laser sources into one optic fiber, consisting in passing a laser beam from each of the laser sources through a corresponding first optical system, single reflection from a corresponding substantially flat individual reflecting surface towards an input facet of the fiber and focusing the laser beam by a second optical system on the input facet, wherein the laser light is emitted by laser modules (1) each comprising single laser source in an individual module housing (2), with the first optical system (4) connected with this housing (2) in a fixed position with respect to the housing (2), and in the housing (2) of each laser module (1) is mounted in a holder (17, 20), the second optical system (9) is placed directly in front of the input facet (10′) of the fiber (10), a first optical axis (12) of each first optical system (3) forms with a second optical axis of the second optical system (9) an angle (α) ranging from 45 (α′) to 145 (α″) degrees, characterized in that each of the individual reflecting surface (7) is on oblique truncations of one of a plurality of rods (15, 19) whose axes are parallel to the second optical axis (13) of the second optical system (9).