Integrated optical receiver/transmitter
First Claim
1. An integrated optical receiver/transmitter (transceiver), comprising:
- a substrate;
modulator means, fabricated above said substrate, responsive to a modulation signal, for receiving input light, and for providing a modulated transmit light;
a first waveguide fabricated above said substrate and connected to said modulator means for propagating said modulated transmit light;
a second waveguide fabricated above said substrate and different from said first waveguide;
photodetector means, fabricated above said substrate, connected to said second waveguide for detecting receive light propagating along said second integrated waveguide, and for providing a receive signal indicative of the intensity of said receive light.
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Accused Products
Abstract
An integrated optical receiver/transmitter (transceiver) 8 has continuous wave (cw) light 16 that enters a Mach-Zehnder optical modulator 10 controlled by a modulator control circuit 12 that provides modulated light 30 along a waveguide 32 to an optical coupler 34 which couples a predetermined portion of the light 30 to a waveguide 44 as light 42 which then exits the transceiver from a port 46. Receive light 90 is accepted at the port 46 and travels along the waveguide 44 to the coupler 34 which couples a predetermined amount of the light 90 to a waveguide 70 as light 92 which is detected by a waveguide-integrated photodetector 72. The photodetector 72 provides a current signal on a line 74 to a receiver circuit 76 which provides a voltage signal indicative of the light 92. Alternatively, the coupler may be passive, thereby not requiring the coupler control circuit, or no coupler at all may be employed and two fibers used for communications with the transceiver 8.
140 Citations
25 Claims
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1. An integrated optical receiver/transmitter (transceiver), comprising:
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a substrate; modulator means, fabricated above said substrate, responsive to a modulation signal, for receiving input light, and for providing a modulated transmit light; a first waveguide fabricated above said substrate and connected to said modulator means for propagating said modulated transmit light; a second waveguide fabricated above said substrate and different from said first waveguide; photodetector means, fabricated above said substrate, connected to said second waveguide for detecting receive light propagating along said second integrated waveguide, and for providing a receive signal indicative of the intensity of said receive light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An integrated optical receiver/transmitter (transceiver), comprising:
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modulator means, fabricated above said substrate, responsive to a modulation signal, for receiving input light, and for providing a modulated transmit light; a first waveguide fabricated above said substrate and connected to said modulator means for propagating said modulated transmit light; a second waveguide fabricated above said substrate and different from said first waveguide; photodetector means, fabricated above said substrate and connected to said second waveguide, for detecting receive light propagating along said second waveguide, and for providing an electrical receive signal indicative thereof; and coupler means, for coupling said transmit light from said first waveguide to a third waveguide and for coupling said receive light from said third waveguide to said second waveguide, thereby allowing bidirectional light to travel along said third waveguide. - View Dependent Claims (24, 25)
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Specification