研究目的
Investigating the coexistence of various spatial distributions of laser intensity in a multimode vertical-cavity surface-emitting laser (VCSEL) at fixed DC values and the effect of diode-laser temperature on the manifestation of multistability.
研究成果
The study demonstrated spatial multistability in a VCSEL, characterized by the coexistence of various laser intensity distributions with different integrated intensities, polarization states, and sets of wavelengths. The effect of laser diode temperature on multistability was also highlighted, with vibrational resonance revealing hidden multistability states.
研究不足
The study is limited by the specific conditions under which the VCSEL operates, including temperature and pump current ranges. The complexity of spatial modes and their interactions may also limit the generalizability of the findings.
1：Experimental Design and Method Selection:
The study involved experimental demonstration of spatial multistability in a VCSEL using hysteresis behavior analysis and vibrational resonance methods.
2：Sample Selection and Data Sources:
An HFE4080-321 laser diode (Honeywell) was used, with data collected on integrated intensities and polarization-resolved intensities.
3：List of Experimental Equipment and Materials:
Equipment included a TED200C temperature controller, avalanche photodiodes (PD1, PD2), a Glan prism, a half-wave plate, a CCD camera, and an Agilent DSO5034A oscilloscope.
4：Experimental Procedures and Operational Workflow:
The pump current was varied in steps, and laser intensity was measured with and without polarization resolution. Spatial intensity distributions were analyzed using a CCD camera.
5：Data Analysis Methods:
Data was processed in real time on a personal computer, with spectral analysis performed using a Bristol 771NIR analyzer.
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