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Silicon photonics multi-channel Bragg reflectors with equal and narrow linewidths are demonstrated by connecting multiple gratings in series or parallel through waveguide effective index engineering and/or grating coupling strength balance.
A silicon photonic temperature sensor based on cladding-modulated grating provides narrowband reflection (0.35-nm), high temperature sensitivity (83 pm/°C) and wide temperature range that outperform the sensors based on ring resonator and strip/slab-type grating counterparts.
We demonstrate a low-power thermo-optical bistability in a graphene oxide-on-silicon micro-ring resonator which not only retains its high quality factor of 56000 but also exhibits a hysteresis loop for a pump power of only 115-μW.
Fully-etched cladding-modulated grating allows not only flexible control of the reflection response but also large fabrication tolerance. A reflection bandwidth of < 0.6 nm and a Bragg wavelength variation of within 1 nm is experimentally demonstrated.
An alternative approach to realize CMOS-compatible integrated Bragg gratings is proposed and implemented in this work to allow flexible control of the reflection response. To enable weak grating coupling strength in fully-etched waveguide, we employ corrugations on long side waveguides in the proposed cladding-modulated waveguides, leading to a measured reflection bandwidth of only 0.44 nm and a peak...
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