Integrated optical circuits

Details Integrated optical circuits Integrated optical circuits

1975-05-09

1977-02-15

Corbin, John K.

Oscillators

Relaxation oscillators

331 945H, 350 96C, G02B 514

Patent

active

040079783

ABSTRACT:
An integrated optical circuit transmitter fabricated on a single semiconductor substrate, which includes a source of optical pulses of variable wavelengths at a predetermined repetition rate. This source may take the form of a surface laser of III-V semiconductor compound material or a mixed ternary III-V semiconductor composition which includes a portion of the substrate and a semiconductor mesa of III-V semiconductor compound material or mixed ternary III-V semiconductor composition mounted on the substrate and having an active surface laser region along the top thereof in which laser radiation is generated in response to the admission of laser radiation through the substrate and the mesa in a direction extending thereto. An optical waveguide is disposed in juxtaposition to the active surface laser region and is coupled thereto to form an evanescent field-coupling therebetween matching the phase velocity of the laser radiation generated in the active surface laser region to that of the optical waveguide for transmitting laser radiation to the optical waveguide. In a more specific aspect, an integrated optical circuit transmitter is disclosed utilizing a laser source to obtain optical pulses of variable wavelengths at a predetermined repetition rate, an optical waveguide transmission path configuration including branch waveguide transmission paths, an optical modulator mounted on the primary waveguide transmission path to impart pulse code modulation to the optical pulse train as provided by the laser source, wherein the optical pulse train in the primary waveguide transmission path may be directed into one or the other of branch waveguide transmission paths in response to activation of the optical modulator, and an acousto-optic switch to enable transfer of the optical pulses from one branch waveguide transmission path to another separate optical waveguide portion upon activation thereof.

REFERENCES:
patent: 3589794 (1971-06-01), Marcatili
patent: 3716804 (1973-02-01), Groschwitz

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