Experimental integrated optic circuit losses and fiber pigtailing of chips

Abstract

Experimental integrated optic circuit losses, including waveguide bend, waveguide offsets, metal electrodes, and fiber-to-channel coupling, are presented. Coupling measurements from single-mode fibers to straight waveguides show losses less than 1 dB. Integrated optic circuit losses due to waveguide bends and offsets were calculated and measured; these data are in excellent agreement. A four-section <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\Delta\beta</tex> reversal switch has been permanently coupled to single-mode fiber pigtails with coupling losses approaching the measured optimum and theoretically predicted value.