Linear and stable photonic radio frequency phase shifter based on a dual-parallel Mach-Zehnder modulator using a two-drive scheme.
← Research streamA dual-parallel Mach-Zehnder modulator using a two-drive scheme produced a continuous, linear RF phase shift of more than 360° with power variation less than ±0.15 dB at 1 GHz by tuning the modulator bias voltage. The phase tuning bandwidth was more than 17 M…
Study snapshot
Abstract
We theoretically and experimentally demonstrate a linear and stable photonic RF phase shifter based on a dual-parallel Mach-Zehnder modulator (DPMZM) using a two-drive scheme. To avoid the effect of the residual optical carrier and overcome the lowest frequency limit from the optical filter, a local microwave signal and a signal up-converted from the under-phase-shifted RF signal are applied to the two RF inputs of the DPMZM, respectively. A phase-shifted RF signal is generated by beating the two first-order upper sidebands located in the passband of the optical filter. A continuous and linear phase shift of more than 360° and power variation of less than ±0.15 dB at 1 GHz are achieved by simply tuning the bias voltage of the modulator. A phase tuning bandwidth of more than 17 MHz and phase drift of less than 0.5° within 2000 s are also observed.
AI evidence extraction
Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.
Main findings
A dual-parallel Mach-Zehnder modulator using a two-drive scheme produced a continuous, linear RF phase shift of more than 360° with power variation less than ±0.15 dB at 1 GHz by tuning the modulator bias voltage. The phase tuning bandwidth was more than 17 MHz, and phase drift was less than 0.5° over 2000 s.
Outcomes measured
- RF phase shift range (degrees)
- Power variation (dB)
- Phase tuning bandwidth (MHz)
- Phase drift (degrees)
View raw extracted JSON
{
"study_type": "engineering",
"exposure": {
"band": "RF",
"source": "other",
"frequency_mhz": 1000,
"sar_wkg": null,
"duration": "2000 s"
},
"population": null,
"sample_size": null,
"outcomes": [
"RF phase shift range (degrees)",
"Power variation (dB)",
"Phase tuning bandwidth (MHz)",
"Phase drift (degrees)"
],
"main_findings": "A dual-parallel Mach-Zehnder modulator using a two-drive scheme produced a continuous, linear RF phase shift of more than 360° with power variation less than ±0.15 dB at 1 GHz by tuning the modulator bias voltage. The phase tuning bandwidth was more than 17 MHz, and phase drift was less than 0.5° over 2000 s.",
"effect_direction": "unclear",
"limitations": [],
"evidence_strength": "insufficient",
"confidence": 0.74,
"peer_reviewed_likely": "yes",
"keywords": [
"photonic RF phase shifter",
"dual-parallel Mach-Zehnder modulator",
"two-drive scheme",
"optical filter",
"microwave signal",
"phase drift",
"phase tuning bandwidth"
],
"suggested_hubs": []
}AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.
Identifiers and source
DOI: 10.1364/ao.52.008332
PubMed: 24513835