Method and apparatus for coupling light emitted from a multi-mod

Details Method and apparatus for coupling light emitted from a multi-mod Method and apparatus for coupling light emitted from a multi-mod

1995-05-02

1996-07-02

Lee, John D.

Optical waveguides

Polarization without modulation

385 33, 385 36, 359495, G02B 627

Patent

active

055331521

ABSTRACT:
A method and apparatus for coupling a multi-mode diode laser with an optical fiber suitable for incorporation into fiber optic medical instruments, welding equipment, laser copiers, laser printers and facsimile machines. In one embodiment, light emitting from a diode laser 40 is collected by collecting optics. One-half of the light which passes through the collecting optics is passed through a half-wave plate 44 which rotates the polarization of that light which passes through the half-wave plate 44 thereby producing two distinct beams of polarized light (43,49). The two beams of light then pass through a Wollaston or Rochon prism 46 which causes the two beams to overlap upon exiting the prism, where the exiting light is allowed to enter an optical fiber 48. In another embodiment, one-half of the light emitted from a laser diode 40 is rotated by a half-wave plate 44. Both rotated and non-rotated light is then passed through collecting optics and subsequently through a double refractor 50 such that the rotated and non-rotated light is overlapped onto one another and then subsequently inserted into an optical fiber 48.

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patent: 5040862 (1991-08-01), Burton et al.
patent: 5164724 (1992-11-01), Hartley et al.
patent: 5425117 (1995-06-01), Miesak

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