研究目的
Investigating the presence of four-wave mixing (FWM) in surface nanoscale axial photonics resonators (SNAPRs) as a first step towards generating simple-to-fabricate and cheap sub-100 GHz frequency combs.
研究成果
The study successfully demonstrated four-wave mixing in a surface nanoscale axial photonics resonator, marking a significant step towards the generation of frequency combs in silica glass micro resonators with an easy fabrication process.
研究不足
The study is a first demonstration of nonlinear frequency effects in SNAPRs, indicating potential for further optimization and exploration of frequency comb generation.
1：Experimental Design and Method Selection:
The experiment involved creating a SNAPR by locally annealing a microfiber with a hydrogen-oxygen flame and coupling it with a tapered fiber for evanescent field coupling. The resonator was embedded into an external self-locked active pump cavity for stable pumping.
2：Sample Selection and Data Sources:
A standard optical fiber was tapered and then locally annealed to create the SNAPR.
3：List of Experimental Equipment and Materials:
Hydrogen-oxygen flame for tapering and annealing, tapered optical fiber, erbium doped fiber amplifier (EDFA), tunable band-pass filter, polarizer, and polarization controller.
4：Experimental Procedures and Operational Workflow:
The SNAPR was set in direct contact with a tapered fiber for coupling. The system was configured to lase on two SNAP resonances, enabling the observation of FWM.
5：Data Analysis Methods:
The transmission spectrum of the SNAPR was measured, and the presence of FWM was identified through the generation of additional frequency components outside the filter bandwidth.
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