Light guide device, light guide method, and LD module
AssigneeFujikura Ltd.
InventorYohei Kasai
Life of this patent
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Abstract
To increase the reliability of an LD module without decreasing the efficiency of coupling between the laser diode and the optical fiber, an LD module (1) includes a light-guiding device mounted therein that includes (i) a dividing optical system (DM) configured to divide a laser beam so as to generate a partial beam group and (ii) a compositing optical system (RM1, RM2, PRE, PBC) configured to composite the partial beam group so as to generate a partial beam bundle including a plurality of partial beams each having an S axis parallel to a particular spatial axis.
Claims8
A light-guiding device, comprising:
- a dividing optical system configured to divide a laser beam so as to generate a partial beam group consisting of a plurality of partial beams having respective traveling directions different from each other;
- and
- a compositing optical system configured to spatially composite the partial beam group so as to generate a partial beam bundle consisting of a plurality of partial beams, each of the plurality of partial beams having an S axis and a polarization direction both parallel to a particular spatial axis,
- the partial beam bundle having an S-axis diameter smaller than an S-axis diameter of the laser beam.
A light-guiding method, comprising the steps of:
- dividing a laser beam so as to generate a partial beam group including a plurality of partial beams having respective traveling directions different from each other;
- and
- spatially compositing the partial beam group so as to generate a partial beam bundle including a plurality of partial beams, each of the plurality of partial beams having an S axis and a polarization direction both parallel to a particular spatial axis,
- the partial beam bundle having an S-axis diameter smaller than an S-axis diameter of the laser beam.
A light-guiding device, comprising:
- a dividing optical system configured to divide a laser beam so as to generate a partial beam group consisting of a plurality of partial beams having respective traveling directions different from each other;
- and
- a compositing optical system configured to wavelength-composite the partial beam group so as to generate a partial beam bundle consisting of a plurality of partial beams, each of the plurality of partial beams having an S axis and a polarization direction both parallel to a particular spatial axis,
- the partial beam bundle having an S-axis diameter smaller than an S-axis diameter of the laser beam.
Dependencies are inferred from the claim text.