All-optical wavelength conversion is a key technology for resolving wavelength contention challenges in routing and switching in a format-and transmission-rate-transparent fashion.Silicon-on-insulator devices,with the...All-optical wavelength conversion is a key technology for resolving wavelength contention challenges in routing and switching in a format-and transmission-rate-transparent fashion.Silicon-on-insulator devices,with their high optical confinement and large Kerr coefficient,hold promise for the on-chip integration of efficient wavelength converters.However,integrated wavelength converters based on four-wave mixing still face challenges,such as the inefficiency of the process,which is exacerbated by the need for off-chip filtering.Such filtering is essential to suppress the residual pump(s)and signal,ensuring the output spectrum predominantly contains the newly generated idler.While on-chip filtering has already been demonstrated,aspects such as idler continuous tunability and system performance when operating with high-symbol-rate signals remain unexplored.We present a silicon photonic wavelength converter with an integrated filter that achieves widely tunable filtering over 25 nm,with a pump and modulated signal suppression ratio exceeding 52 dB.The operation of the device with telecommunication signals is demonstrated across the C-band.展开更多
An out-of-plane silicon grating coupler capable of mode-order conversion at the chip–fiber interface is designed and fabricated. Optimization of the structure is performed through finite-difference time-domain simula...An out-of-plane silicon grating coupler capable of mode-order conversion at the chip–fiber interface is designed and fabricated. Optimization of the structure is performed through finite-difference time-domain simulations,and the final device is characterized through far-field profile and transmission measurements. A coupling loss of 3.1 dB to a commercial two-mode fiber is measured for a single TE0→ LP11 mode conversion grating, which includes a conversion penalty of 1.3 dB. Far-field patterns of the excited LP11 mode profile are also reported.展开更多
基金UK’s EPSRC through projects JUNIPERS (EP/T007303/1) and HASC (EP/X040569/1)Strategic Equipment Award (EP/X030040/1)Royal Society (EP/T019697/1, CORNERSTONE 2, EP/W035995/1,CORNERSTONE 2.5)
文摘All-optical wavelength conversion is a key technology for resolving wavelength contention challenges in routing and switching in a format-and transmission-rate-transparent fashion.Silicon-on-insulator devices,with their high optical confinement and large Kerr coefficient,hold promise for the on-chip integration of efficient wavelength converters.However,integrated wavelength converters based on four-wave mixing still face challenges,such as the inefficiency of the process,which is exacerbated by the need for off-chip filtering.Such filtering is essential to suppress the residual pump(s)and signal,ensuring the output spectrum predominantly contains the newly generated idler.While on-chip filtering has already been demonstrated,aspects such as idler continuous tunability and system performance when operating with high-symbol-rate signals remain unexplored.We present a silicon photonic wavelength converter with an integrated filter that achieves widely tunable filtering over 25 nm,with a pump and modulated signal suppression ratio exceeding 52 dB.The operation of the device with telecommunication signals is demonstrated across the C-band.
基金supported by the Engineering and Physical Sciences Research Council(EPSRC)UK through the Silicon Photonics for Future Systems(SPFS)Programme(EP/L00044X/1)the Photonic Phase Conjugation Systems(PHOS)(EP/S003436/1)
文摘An out-of-plane silicon grating coupler capable of mode-order conversion at the chip–fiber interface is designed and fabricated. Optimization of the structure is performed through finite-difference time-domain simulations,and the final device is characterized through far-field profile and transmission measurements. A coupling loss of 3.1 dB to a commercial two-mode fiber is measured for a single TE0→ LP11 mode conversion grating, which includes a conversion penalty of 1.3 dB. Far-field patterns of the excited LP11 mode profile are also reported.
