213 citations · 629 across the 12 of their papers we have counts for
13 papers
Residual AM and PM Noise of Selected X-Band Amplifiers
Archita Hati, Craig Nelson, Scott Littrell
In microwave systems design, amplitude modulation (AM) noise is often ignored relative to phase modulation (PM) noise. However, in high-performance applications requiring ultra-low…
10 GHz Generation with Ultra-Low Phase Noise via the Transfer Oscillator Technique
Nicholas V. Nardelli, Tara M. Fortier, Marco Pomponio +4
Coherent frequency division of high-stability optical sources permits the extraction of microwave signals with ultra-low phase noise, enabling their application to systems with str…
Cross-spectrum noise measurements at 4 K to minimize power-splitter anti-correlation effect
Archita Hati, Craig W. Nelson, David Pappas +1
We report an accurate measurement of the phase noise of a thermally limited electronic oscillator at 300 K. By thermally limited we mean that the white signal-to-noise ratio of the…
Cross-spectrum Measurement of Thermal-noise Limited Oscillators
Archita Hati, Craig W. Nelson, David A. Howe
Cross-spectrum analysis is a commonly-used technique for the detection of phase and amplitude noise of a signal in the presence of interfering noise. It extracts the desired correl…
An integrated low phase noise radiation-pressure-driven optomechanical oscillator chipset
X. Luan, Y. Huang, Y. Li +13
High-quality frequency references are the cornerstones in position, navigation and timing applications of both scientific and commercial domains. Optomechanical oscillators, with d…
PM noise Measurement at W-Band
A. Hati, C. W. Nelson, D. A. Howe
We present improved performance for a 92 to 96 GHz cross-spectrum phase modulated (PM) noise measurement system reported. The system is principally designed to measure amplifiers i…
PM noise of a 40 GHz air-dielectric cavity oscillator
Archita Hati, Craig W. Nelson, B. Riddle +1
We describe the design of a low-phase-modulated (PM) noise, 40 GHz oscillator that uses a conventional air-dielectric cavity resonator as a frequency discriminator to improve the P…
Operation of an optically coherent frequency comb outside the metrology lab
Laura C. Sinclair, Ian Coddington, William C. Swann +4
We demonstrate a self-referenced fiber frequency comb that can operate outside the well-controlled optical laboratory. The frequency comb has residual optical linewidths of < 1 Hz,…
Phase inversion and collapse of the cross-spectral function
Craig W. Nelson, Archita Hati, David A. Howe
Cross-spectral analysis is a mathematical tool for extracting the power spectral density of a correlated signal from two time series in the presence of uncorrelated interfering sig…
Feedback and harmonic locking of slot-type optomechanical oscillators to external low-noise reference clocks
Jiangjun Zheng, Ying Li, Noam Goldberg +8
We demonstrate feedback and harmonic locking of chip-scale slot-type optomechanical oscillators to external low-noise reference clocks, with suppressed timing jitter by three order…
Analysis of shot noise in the detection of ultrashort optical pulse trains
Franklyn Quinlan, Tara M. Fortier, Haifeng Jiang +1
We present a frequency domain model of shot noise in the photodetection of ultrashort optical pulse trains using a time-varying analysis. Shot noise-limited photocurrent power spec…
Photonic microwave generation with high-power photodiodes
Tara M. Fortier, Franklyn Quinlan, Archita Hati +5
We utilize and characterize high-power, high-linearity modified uni-traveling carrier (MUTC) photodiodes for low-phase-noise photonic microwave generation based on optical frequenc…
Sub-femtosecond absolute timing precision with a 10 GHz hybrid photonic-microwave oscillator
T. M. Fortier, C. W. Nelson, A. Hati +10
We present an optical-electronic approach to generating microwave signals with high spectral purity. By circumventing shot noise and operating near fundamental thermal limits, we d…