研究目的
Investigating the generation of broad-band circularly polarised supercontinuum in chiral photonic crystal fibre.
研究成果
The study demonstrates for the first time that chiral PCF can generate a broad-band SC that is robustly circularly polarised across the spectrum, potentially useful for studies of chiral light-matter interactions.
研究不足
The study is limited by the specific properties of the twisted PCF used, such as its twist period and loss characteristics, which may affect the generalizability of the findings.
1：Experimental Design and Method Selection:
The study uses a twisted photonic crystal fibre (PCF) to generate a broad-band supercontinuum (SC) that maintains circular polarization across the spectrum.
2：Sample Selection and Data Sources:
A 60-cm-long continuously twisted, endlessly single-mode PCF with specific dimensions was used.
3：List of Experimental Equipment and Materials:
The setup included a 40-ps pump source at 1064 nm, a quarter-wave plate, an aspheric lens, a microscope objective, an optical spectrum analyser, and a commercial polarimeter.
4：Experimental Procedures and Operational Workflow:
Light was launched into the PCF, and the output was collimated and analysed for spectrum and polarization state.
5：Data Analysis Methods:
The polarization state at different wavelengths was monitored using a polarimeter, and the SC spectra were measured.
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pump source
40-ps at 1064 nm
To provide the initial light for the experiment
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quarter-wave plate
To switch between left-circular and right-circular polarisation states
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aspheric lens
20× magnification
To launch light into the PCF
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microscope objective
20× magnification
To collimate the output light
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optical spectrum analyser
To measure the generated spectrum
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polarimeter
commercial
To monitor the polarisation state at different wavelengths
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CaF2 equilateral prisms
To separate the SC spectrum into its constituent spectral components
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