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Optical coupler for optical direct amplifier

  • US 4,805,977 A
  • Filed: 11/02/1987
  • Issued: 02/21/1989
  • Est. Priority Date: 11/04/1986
  • Status: Expired due to Term
First Claim
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1. An optical coupler for an optical direct amplifier using stimulated Raman effect in which pump light is wavelength multiplexed with signal light and multiplexed light is applied to a transmission optical fiber, comprising;

  • a polarization multiplex prim for multiplexing two linear polarization beams with the same wavelength and perpendicular polarization planes generated by semiconductor lasers, and for providing a single output multiplexed beam,a wavelength multiplexer optically coupled with said single output multiplexed beam of said polarization multiplex prism so that the output of said polarization multiplex prism is wavelength division multiplexed with signal light, andthe output of said wavelength multiplexer being applied to a single transmission optical fiber.

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