Photonic Multiple Frequency Measurement Using a Frequency Shifting Recirculating Delay Line Structure

2014 ◽  
Vol 32 (20) ◽  
pp. 3831-3838 ◽  
Author(s):  
Tuan A. Nguyen ◽  
Erwin H. W. Chan ◽  
Robert A. Minasian
Keyword(s):  
Delay Line ◽  
Frequency Measurement ◽  
Multiple Frequency ◽  
Line Structure ◽  
Frequency Shifting

Photonic Radio Frequency Memory Using Frequency Shifting Recirculating Delay Line Structure

2014 ◽  
Vol 32 (1) ◽  
pp. 99-106 ◽  
Author(s):  
Tuan A. Nguyen ◽  
Erwin H. W. Chan ◽  
Robert A. Minasian
Keyword(s):  
Radio Frequency ◽  
Delay Line ◽  
Line Structure ◽  
Frequency Shifting

Synchronization in Dual Delay Line SAW Sensors

2004 ◽  
Author(s):  
Duck-Bong Seo ◽  
Z. C. Feng
Keyword(s):  
Delay Line ◽  
Phase Measurement ◽  
Surface Adsorption ◽  
Propagation Speed ◽  
Frequency Measurement ◽  
Frequency Change ◽  
Averaged Equations ◽  
Excited Oscillation ◽  
The Difference ◽  
Delay Differential

Surface acoustic wave (SAW) sensors are self-excited oscillators. Self-excitation is a consequence of the finite amount of delay in the circuit. The oscillation frequency is affected by the wave propagation speed which further depends on surface adsorption. Therefore, measurement on the surface adsorption is done by measuring the frequency change of the self-excited oscillation. In dual delay line oscillators the difference between the surface physical conditions is reflected through the difference in oscillation frequencies. Delay differential equations are used to model the sensor. Bifurcation analysis of the averaged equations indicates the presence of synchronization. The occurrence of synchronization is further demonstrated through numerical simulations. Synchronization makes the frequency measurement irrelevant. We propose phase measurement as an alternative in the presence of strong coupling between the two oscillators.

scholarly journals High-accuracy Photonics-assisted Frequency Measurement With Rough-accurate Compensation Based on Mach-Zehnder Interfering and Power Cancellation

2021 ◽  
Author(s):  
Lanfeng Huang ◽  
Yongjun Li ◽  
Shanghong Zhao ◽  
Tao Lin ◽  
Guodong Wang ◽  
...  
Keyword(s):  
Frequency Estimation ◽  
Frequency Measurement ◽  
High Accuracy ◽  
Optical Field ◽  
Comparison Function ◽  
Multiple Frequency ◽  
Frequency Identification ◽  
Mach Zehnder Modulator ◽  
Rf Signal ◽  
Polarization Division Multiplexing

Abstract A high-accuracy photonics-assisted frequency measurement with rough-accurate compensation based on Mach-Zehnder interfering and power cancellation is proposed. A polarization division multiplexing dual-parallel Mach–Zehnder modulator (PDM-DPMZM) is employed to mix the unknown RF signal and sweep signal to optical field. The rough measurement is firstly performed by the interference of a Mach-Zehnder interferometer (MZI) to realize fast frequency estimation. Then, based on the rough measurement result, the accurate measurement based on power cancellation is implemented in a much narrower range, which greatly improves the efficiency of frequency measurement. The simulation results show that the amplitude comparison function (ACF) established by interference can achieve a measurement error of less than 0.3 GHz over 0.5 ~39 GHz. Moreover, thanks to the rough-accurate compensation, the accuracy can be further improved to 4 MHz. Additionally, the multiple frequency identification with a resolution of 10 MHz can also be achieved based on this system.

Multiple-frequency measurement based on serial photonic channelization using optical wavelength scanning

2013 ◽  
Vol 38 (22) ◽  
pp. 4781 ◽  
Author(s):  
Ruiyue Li ◽  
Hongwei Chen ◽  
Ying Yu ◽  
Minghua Chen ◽  
Sigang Yang ◽  
...  
Keyword(s):  
Frequency Measurement ◽  
Multiple Frequency ◽  
Optical Wavelength ◽  
Wavelength Scanning

scholarly journals Investigation of temporal Talbot operation in a conventional optical tapped delay line structure

2019 ◽  
Vol 27 (6) ◽  
pp. 7922
Author(s):  
Jianqi Hu ◽  
Simon J. Fabbri ◽  
Chen-Bin Huang ◽  
Camille-Sophie Brès
Keyword(s):  
Delay Line ◽  
Line Structure

Recirculating Frequency Shifting Based Photonic-assisted Broadband Instantaneous Radio-frequency Measurement

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
Cheng Lei ◽  
Minghua Chen ◽  
Hongwei Chen ◽  
Sigang Yang ◽  
Shizhong Xie
Keyword(s):  
Radio Frequency ◽  
Frequency Measurement ◽  
Frequency Shifting
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