Patent
Self injection locked phase locked looped optoelectronic oscillator
TLDR
In this article, a self-injection locking circuit for sustaining an RF modulated optical signal is described, where the circuit is composed of a self injection locking component (107) having a fiber optic delay line (130) over which a portion of the optical signal propagates and a phase detector (150) coupled to the at least two fiber optic cables and configured to determine a phase difference between the signals propagating over one of the respective fiber optic cable.Abstract:
Aspects of the disclosure relate generally to a circuit (100) for sustaining an radio frequency (RF) modulated optical signal. The circuit may comprise a self injection locking component (107) having a fiber optic delay line (130) over which a portion of the optical signal propagates. The circuit may also comprise a self phase locked loop component (109) having at least two fiber optic cables (120, 140) having different lengths and over which another portion of the optical signal propagates and a phase detector (150) coupled to the at least two fiber optic cables and configured to determine a phase difference between the signals propagating over one of the respective fiber optic cables. The circuit may further comprise a voltage controlled oscillator (110) configured to generate a stable oscillating signal in response to signals generated by each of the self injection locking and self phase locked loop components, the stable oscillating signal being configured to sustain the optical signal.read more
Citations
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References
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Journal ArticleDOI
Optoelectronic oscillator for photonic systems
X.S. Yao,Lute Maleki +1 more
TL;DR: In this paper, the authors describe a novel photonic oscillator that converts continuous-light energy into stable and spectrally pure microwave signals, which can be used for high-frequency reference regeneration and distribution, high gain frequency multiplication, comb frequency and pulse generation, carrier recovery, and clock recovery.
Journal ArticleDOI
Multiloop optoelectronic oscillator
X.S. Yao,Lute Maleki +1 more
TL;DR: In this article, the authors describe and demonstrate a multiloop technique for singlemode selection in an optoelectronic oscillator (OEO) and demonstrate the first fiber-optic implementation of the carrier suppression technique to further reduce the close-to-carrier phase noise of the oscillator.
Journal ArticleDOI
High frequency optical subcarrier generator
X.S. Yao,Lute Maleki +1 more
TL;DR: In this article, an electro-optical oscillator capable of generating high stability optical signals at frequencies up to 70 GHz was described, and a comb of stable frequencies was produced by modelocking the oscillator.
Journal ArticleDOI
Converting light into spectrally pure microwave oscillation.
X. S. Yao,Lute Maleki +1 more
TL;DR: This optoelectronic oscillator can generate ultrastable spectrally pure microwave reference frequencies as high as 75 GHz with a phase noise lower than 2140 dBcyHz at 10 kHz, independent of oscillation frequency.
Journal ArticleDOI
Dual microwave and optical oscillator.
X.S. Yao,Lute Maleki +1 more
TL;DR: In this paper, the authors describe and demonstrate a novel device in which a microwave oscillation and an optical oscillation are generated and directly coupled with each other, which is capable of simultaneously generating stable optical pulses down to the subpicosecond level and spectrally pure microwave signals at frequencies greater than 70 GHz.