Abstract

The method of parallel end-butt coupling has been used to couple GaAs laser diodes to Ta₂O₅ thin film waveguides. Theoretical caluclations predict that a coupling efficiency into the lowest order waveguide mode of 90% is achievable if the thicknesses of the waveguide (t_g) and the laser light emitting layer (t_L) are equal. Experimentally, efficiencies as high as 45.1% have been measured for laser and waveguide combinations with t_g/t_L = 0.34. The tolerance to misalignment of the laser and waveguide has been theoretically and experimentally evaluated.

© 1977 Optical Society of America

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