Controlled Fiber Optic Switching.
Final rept. 19 Sep 79-1 Oct 80,
HUGHES RESEARCH LABS MALIBU CA
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This program has resulted in the demonstration of a low-loss, low-voltage, high-speed four-section delta-beta-reversal switchable optical directional coupler which has been permanently coupled to single-mode fiber pigtails. The measured coupling losses between switch and fibers approach the measured optimum and theoretical predictions. In addition, experimental integrated-optic circuit losses, including waveguide bend, waveguide offsets, metal electrodes, and fiber-to-channel coupling, are presented. Coupling measurements from single-mode fiber 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. Although the overall loss of the delivered device is approaching theoretical limits, there are areas where obvious improvements are required.
- Fiber Optics and Integrated Optics