Integrated production of self injection locked self phase loop locked optoelectronic oscillator
First Claim
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1. A monolithically integrated optoelectronic oscillation circuit for sustaining an oscillating optical signal, comprising:
- an injection locking circuit comprising at least one fiber optic delay line configured to receive a first portion of the optical signal;
a phase lock loop circuit comprising at least two fiber optic delay lines configured to receive other portions of the optical signal;
a monolithically integrated voltage controlled oscillator configured to generate a stable oscillating signal in response to each of an injection locking signal derived from the first portion of the optical signal and a phase lock loop signal derived from the other portions of the optical signal, the stable oscillating signal being configured to RF modulate the optical signal.
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Abstract
The present invention details fabrication guidelines of integrated optoelectronic oscillators with frequency and phase stability, having higher frequency selectivity in a relatively small size (compared to the larger size of a higher order electrically realized RF filter), reduced temperature sensitivity, and minimized frequency drift. The integrated photonic components and RF oscillator may use Silicon photonics and microelectronic integration using CMOS and BiCMOS technology, eliminating the need for bulky and/or discrete optical and microwave components.
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Citations
29 Claims
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1. A monolithically integrated optoelectronic oscillation circuit for sustaining an oscillating optical signal, comprising:
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an injection locking circuit comprising at least one fiber optic delay line configured to receive a first portion of the optical signal; a phase lock loop circuit comprising at least two fiber optic delay lines configured to receive other portions of the optical signal; a monolithically integrated voltage controlled oscillator configured to generate a stable oscillating signal in response to each of an injection locking signal derived from the first portion of the optical signal and a phase lock loop signal derived from the other portions of the optical signal, the stable oscillating signal being configured to RF modulate the optical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An optoelectronic oscillator having monolithically integrated Si-Photonics structures, comprising:
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a modulator providing an optical signal; a first photodetector for converting a portion of the optical signal to an electrical signal, the first photodetector having an output that is coupled to a first amplifier; an optical filter for receiving a portion of the optical signal, the optical filter having an output that is coupled to a second photodetector for converting a portion of the optical signal to an electrical signal, the second photodetector having an output that is coupled to a second amplifier; a third photodetector for converting a portion of the optical signal to an electrical signal, the third photodetector having an output that is coupled to a third amplifier; a phase detector for receiving a first RF signal from the first amplifier and a second RF signal from the second amplifier with a longer delay than the first RF signal, the phase detector configured to determine a phase difference between the first and second RF signals; and a voltage controlled oscillator for receiving a third RF signal from the third amplifier, and for receiving an electrical signal from the phase detector, wherein the voltage controlled oscillator is configured to output an oscillating signal in response to each of the electrical signal from the phase detector and the third RF signal, and wherein the oscillating signal is used to control an output of the modulator, wherein each of the modulator, photodetectors, amplifiers, optical filter, phase detector, and voltage controlled oscillator are formed on an integrated circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification