Single‐shot all‐optical sampling oscilloscope using a polarization‐maintaining resonator for pulse replication

Abstract

An all-optical single-shot sampling oscilloscope with a picosecond resolution is developed. An innovative approach for data pulse replication using a polarization-maintaining resonator is used. Pulses are sampled in a highly nonlinear fiber. Acquired data are used for pulse shape reconstruction. Proposed setup eliminates the need of a delay line.ABSTRACT: Frequency equalization is essential for radio-over-fiber (RoF) applications due to the degraded performance at higher frequencies.In this article, an easily implemented scheme for tunable frequency equalization in RoF link is proposed. A tunable and reconfigurable microwave photonic filter is used in this method, which is realized through variable optical tilt filter.

Analyses of optical packet switching techniques based on nonlinear materials with respect to various label formats

“…When a FPGA processing unit is employed for generation of multiple routing signals according to the label content, switching time will increase slightly, depending on the labeling technique complexity and as well on the processing speed of the FPGA itself. As a delay-line a segment of conventional optical fiber was utilized and also a fiber loop resonator as proposed in previous work [17] was tested for specific applications.…”

Analysis of Pulse Replicators for High-Bandwidth, High-Dynamic-Range, Single-Shot Optical Characterization

“…For each pulse shape, a set of ten calibration errors for a different draw of the random error and noise was used, even if very little variation between the bandwidth for each set was observed. A natural metric for performance is the amplitude of the frequency transfer function calculated with the remaining calibration error, i.e., (19) where each delay is the difference between the simulated delay error and the retrieved delay error for replica . This choice is relevant since it identifies the impact of the algorithm on the performance of the replicator in the presence of noise, i.e., it identifies the unknown bandwidth limitation attributed to the replicator in experimental conditions for each algorithm.…”

“…the 1.5-bit improvement in SNR over an 8-year period, identified in [5]). A recirculating loop architecture, where the optical pulse circulates in an optical loop with a partial coupler, letting a fraction of the pulse come out at each round-trip, has also been demonstrated [17]- [19]. Replicators using free-space propagation between two mirrors have been used in the context of the generation of multiple pulses used to gate an optical signal, as an extension of Fabry-Perot interferometers [20].…”

“…Replicators using free-space propagation between two mirrors have been used in the context of the generation of multiple pulses used to gate an optical signal, as an extension of Fabry-Perot interferometers [20]. Apart from SNR improvement by signal averaging, optical pulse replicators have been used for the single-shot measurement of optical signals with sampling systems [17]- [19] and nonlinear cross-correlations [20]. Practical issues of optical pulse replication for the purpose of high-dynamic-range measurements are studied.…”

Periodic modulation-based spectral and temporal superresolution with a single measurement

“…For measurement of single-shot ultrashort optical pulses, our method can be compared with two techniques: temporal magnification with a time lens [17][18][19][20] and all-optical sampling [21][22][23][24]. Magnification of the pulse to be measured can also be considered as superresolution, since the Fourier transform of the pulse intensity is compressed and transmitted through the passband of conventional photodiodes and oscilloscopes.…”