Coupling of single-mode Ti-diffused LiNbO3 waveguides to single-mode fibers
1979
Abstract We report on measurements of the near-field intensity distribution of single-mode T-diffused LiNbO 3 waveguides and on the alignment tolerances when coupled to a single mode fiber. Coupling efficiencies of typically 77 to 87% are calculated and a value as high as 80% has been measured experimentally for a y -cut substrate and TM-like polarisation. The total insertion loss of 1 cm long single-mode Ti-diffused waveguides ( c -cut) inserted between single-mode fibers was typically 10 dB.
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