Optical fibers and Integrated optics
Characterization of a ring resonatorAdvanced Laboratory Practices, 26th May 2016Atri HalderOptical fibers and Integrated optics
UEF // University of Eastern Finland
Resonance2
Guiding in optical fibers / Atri Halder, 26.05.2016If the frequency of the applied force matches with the natural frequency of any structure, then the amplitude of the field increases after each oscillation. This phenomena is known as resonance.
Resonator3
Guiding in optical fibers / Atri Halder, 26.05.2016
AB
Ring Resonator
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Guiding in optical fibers / Atri Halder, 26.05.2016
Full width at half maxima (FWHM)5
Guiding in optical fibers / Atri Halder, 26.05.2016
Free Spectral Range (FSR)6
Guiding in optical fibers / Atri Halder, 26.05.2016
Finesse7
Guiding in optical fibers / Atri Halder, 26.05.2016
Quality Factor (Q-factor)8
Guiding in optical fibers / Atri Halder, 26.05.2016
Micro ring resonator9
Guiding in optical fibers / Atri Halder, 26.05.2016
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Specification of the ring resonator Guiding in optical fibers / Atri Halder, 26.05.2016
Experimental setup
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Guiding in optical fibers / Atri Halder, 26.05.2016
Result: Reference
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Guiding in optical fibers / Atri Halder, 26.05.2016
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Guiding in optical fibers / Atri Halder, 26.05.2016
Transmission spectrum of through port for a gap 300 nm.
Guiding in optical fibers / Atri Halder, 26.05.2016
Enhanced resonance for a gap of 300 nm.
Guiding in optical fibers / Atri Halder, 26.05.2016
Transmission spectrum of through port for a gap 400 nm.
Guiding in optical fibers / Atri Halder, 26.05.2016
Enhanced resonance for a gap of 400 nm.
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Guiding in optical fibers / Atri Halder, 26.05.2016Transmission spectrum of drop port for a gap 400 nm.
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Guiding in optical fibers / Atri Halder, 26.05.2016Transmission spectrum of through and drop port for a gap 400 nm.
Comparison19
Guiding in optical fibers / Atri Halder, 26.05.2016
Comparison20Guiding in optical fibers / Atri Halder, 26.05.2016
CharacteristicsGap of 300 nmGap of 400 nmFWHM0.55 nm0.475 nmFSR1.507 nm1.526 nmFinesse2.743.21Q-factor3005.73291.25Loss18.40 dB/cm15.84 dB/cm
Conclusion21Guiding in optical fibers / Atri Halder, 26.05.2016
There was a high loss in between the bus and the ring.The structure was so small that there was always a problem of coupling.As the gap between the bus and the ring was increased, the resonance varied a lot and we can conclude that for a gap of 400 nm the resonance was best.The whole experimental work was quite challenging.Though we got a good result for different parameters of the ring resonator, we failed to generate good data for the drop port. It was due to imperfections of the structure and lot of dust particles on the sample.
Thank you!uef.fi
