Polarization-combining fused-fiber optical coupler and method of producing the same
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United States of America Patent
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Nov 4, 2003
Grant Date -
Feb 13, 2003
app pub date -
Jan 7, 2002
filing date -
Aug 8, 2001
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Abstract
A polarization-combining fused-fiber optical coupler is made of polarization maintaining (PM) fibers spliced to non-birefringent single mode (SM) fibers which are fused and drawn near the splicing to form a coupler with an adiabatic tapered profile. The linearly polarized light injected into PM fibers travels through the coupler where the power of the two polarizations is combined and transmitted to one output fiber. The method for producing such coupler involves splicing a pair of PM fibers to a pair of SM fibers, then injecting linearly polarized light into each PM fiber and fusing and drawing SM fibers to form an adiabatic coupler with maximum power transmission at a desired wavelength going to only one output fiber.
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