Phase-Locked Opto-Electronic Oscillator (OEO) of Ultralow Phase Noise With Record-Low Allan Deviation of 3.4 × 10⁻¹⁴ at 1 s

Wang, Xichen; Yao, X. Steve

doi:10.1109/tmtt.2023.3278934

Cited by 3 publications

(5 citation statements)

References 41 publications

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“…Therefore, to see this flatness, one should simulate very small offset frequencies that makes the runtimes of the MCS prohibitively large. Hence the noise value 5 8.9 10 V n k   is used in this subsection which is about 5 10 times larger than the practical values at the RFA input so that this flatness occurs at larger offsets. This relaxes the runtime/memory requirements of the MCS.…”

Section: Comparing Results With Mcsmentioning

confidence: 99%

“…From now on, the RF signal at the EOM input is regarded as the output variable. It is supposed that the RF-BPF significantly attenuates the non-fundamental harmonics of the RF signal such that the output signal is practically single-harmonic [1][2][3][4][5][6][14][15][16].…”

Section: The Dynamics Of the Sloeomentioning

confidence: 99%

“…Optoelectronic oscillators (OEOs) are hybrid photonic-electronic systems that are considered promising candidates for producing ultra-low phase noise (PN) radio frequency (RF) oscillations in the microwave or millimeter-wave range [1]. Many OEO structures use long optical fiber delay lines, which are called delay-based OEOs [1][2][3][4][5][6][7]. A delay-based OEO may be implemented as a single-loop OEO (SLOEO) [1][2][3], multi-loop OEO [4,6], in conjunction with the intentionally induced stimulated Brillouin scattering (SBS) phenomenon [8,9], or as the newly proposed parity-time symmetric OEO by again using delay-based configurations [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Here for simplicity, the case of delay-based SLOEOs is considered. Many methods have been proposed to address the PN analysis of OEOs, such as the methods based on the PN transfer model and control theory [4,5], the analytical formulations extracted from solving the Langevin equation governing the PN [3,12,13], the conversion matrix approach (CMA) [14][15][16], and the envelopedomain semi Monte Carlo methods [2,6]. The techniques in [3,4,[13][14][15][16] predict singular values for the power spectral density (PSD) of the PN-induced output noise at the zero offset frequency.…”

Section: Introductionmentioning

confidence: 99%

“…For larger frequency offsets such as those of the spurious peaks responses, one can use the classical fast methods of e.g. [3,4,5,[13][14][15][16]. The validity of the new approach is verified by comparing its results with the Monte Carlo simulation (MCS), the analytical formulation of [3], and the simulation results of [2].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Accurate Estimation of the Phase Noise of Delay-Based Optoelectronic Oscillators at Close-in Frequency Offsets

Jahanbakht

2024

Scientia Iranica

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Delay-based optoelectronic oscillators (OEOs) use the large propagation delays of long optical fibers to produce ultra-low phase noise (PN) radio frequency (RF) oscillations. Most of the OEO-PN analysis approaches in the literature predict a singular value for the output variable's PN-induced power spectral density (PSD) at zero offset frequency from the carrier. The current paper aims to resolve this issue. First the perturbation theory of classical oscillators is generalized to extract the stochastic delay differential equation (SDDE) governing the PN of OEOs. Then the well-known small delay approximation approach is used to derive a stochastic ordinary differential equation (SODE) governing the PN. Using the previously published solutions to this SODE, the PN-PSD of the OEO is extracted in presence of both white and colored noise sources. As the small delay approximation is only valid for small frequency offsets, the obtained PSDs are only accurate at these offsets. This approach avoids the non-physically large values encountered in classical approaches. For larger frequency offsets one can use the classical noise analysis techniques in the literature. The validity of this approach is verified by comparing its results with those in the literature and direct Monte-Carlo simulations.

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Section: Comparing Results With Mcsmentioning

confidence: 99%

Section: The Dynamics Of the Sloeomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Accurate Estimation of the Phase Noise of Delay-Based Optoelectronic Oscillators at Close-in Frequency Offsets

Jahanbakht

2024

Scientia Iranica

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Single-Frequency Lasers’ Linewidths Elegantly Characterized with Sigmoid Functions of Observation Time

Ma,

Yao

2024

J. Lightwave Technol.

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Linewidth is the most important parameter for characterizing the coherence properties of a single-frequency laser, but unfortunately only the natural linewidth representing the contributions of the spontaneous emission or quantum noise can be described with an analytical expression known as the Schawlow-Townes-Henry formula. To the best of authors' knowledge, no analytical expression is formulized after 63 years since laser's invention for characterizing the effective linewidth of a single-frequency laser including the linewidth broadening caused by the flicker noises, which strongly depends on the measurement duration and is much larger than the natural linewidth. By carefully measuring the instantaneous frequency fluctuations of multiple commercial single-frequency lasers using a self-built optical frequency analyzer with ultra-high resolution and speed to obtain their linewidths with our time domain statistical analysis method, we discover and validate that the laser linewidths can be expressed as one or more Sigmoid functions of observation time. Not only the simple Sigmoid linewidth expression provides clear linewidth information of the laser, but also better understanding of the physical origins affecting the laser linewidths, which will benefit a large number of applications ranging from coherent distributed sensing to gravitational wave detection and therefore is worthy to be widely adopted to fully and elegantly characterize the linewidths of single-frequency lasers.

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光电振荡器：从分立到薄膜铌酸锂光集成（特邀）

Huang Zijun,

Ma Rui,

Cai Xinlun

2024

激光与光电子学进展

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Phase-Locked Opto-Electronic Oscillator (OEO) of Ultralow Phase Noise With Record-Low Allan Deviation of 3.4 × 10⁻¹⁴ at 1 s

Cited by 3 publications

References 41 publications

Accurate Estimation of the Phase Noise of Delay-Based Optoelectronic Oscillators at Close-in Frequency Offsets

Accurate Estimation of the Phase Noise of Delay-Based Optoelectronic Oscillators at Close-in Frequency Offsets

Single-Frequency Lasers’ Linewidths Elegantly Characterized with Sigmoid Functions of Observation Time

光电振荡器：从分立到薄膜铌酸锂光集成（特邀）

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