Silicon micro-ring resonators （MRRs） are compact and versatile devices whose periodic frequency response can be exploited for a wide range of applications. In this paper, we review our recent work on linear all-opti...Silicon micro-ring resonators （MRRs） are compact and versatile devices whose periodic frequency response can be exploited for a wide range of applications. In this paper, we review our recent work on linear all-optical signal processing applications using silicon MRRs as passive filters. We focus on applications such as modulation format conversion, differential phase-shift keying （DPSK） demodulation, modulation speed enhancement of directly modulated lasers （DMLs）, and monocycle pulse generation. The possibility to implement polarization diversity circuits, which reduce the polarization dependence of standard silicon MRRs, is illustrated on the particular example of DPSK demodulation.展开更多
We propose and experimentally demonstrate two simple solutions for power-efficient ultra-wideband （UWB） radio frequency （RF） system assisted by an electrical bandpass filter （EBPF）. In the first solution, any op...We propose and experimentally demonstrate two simple solutions for power-efficient ultra-wideband （UWB） radio frequency （RF） system assisted by an electrical bandpass filter （EBPF）. In the first solution, any optical Gaussian pulse with enough bandwidth is transmitted over optical fiber link, and then converted to a power-efficient UWB pulse by an EBPF with a passband of 3.1 10.6GHz. The transmission and modulation of UWB signal is processed in optical domain, whereas the generation of UWB is processed in electrical domain. Both UWB modulations of on-off keying （OOK） and binary phase shift keying （BPSK） are experimentally demon- strated. In the second solution, the EBPF is used to convert any electrical waveform to a power-efficient UWB pulse. Then the electrical UWB pulse is converted to an optical UWB pulse with a Mach-Zehnder modulator （MZM）, and then distributed over long haul fiber link. These two solutions embody the advantages of both low-loss long- haul transmission of optical fiber and mature electrical circuits. And the millimeter-wave UWB signal is also demonstrated.展开更多
A combined model of the transmission-line laser model （TLLM） and the digital filter approach is developed to simulate the shuttering characteristic of a semiconductor optical amplifier （SOA）, which is inte- grated...A combined model of the transmission-line laser model （TLLM） and the digital filter approach is developed to simulate the shuttering characteristic of a semiconductor optical amplifier （SOA）, which is inte- grated with a sampled grating distributed Bragg reflector （SGDBR） laser, to create a so called SOA-SGDBR laser. The SOA section acts as a shutter to blank the laser output during wavelength switching events. Simulated results show that the turn-on edge of the SOA blanking process will oscillate when the facet reflection of SOA is relatively high. This phenomenon is also observed by experiments.展开更多
文摘Silicon micro-ring resonators （MRRs） are compact and versatile devices whose periodic frequency response can be exploited for a wide range of applications. In this paper, we review our recent work on linear all-optical signal processing applications using silicon MRRs as passive filters. We focus on applications such as modulation format conversion, differential phase-shift keying （DPSK） demodulation, modulation speed enhancement of directly modulated lasers （DMLs）, and monocycle pulse generation. The possibility to implement polarization diversity circuits, which reduce the polarization dependence of standard silicon MRRs, is illustrated on the particular example of DPSK demodulation.
文摘We propose and experimentally demonstrate two simple solutions for power-efficient ultra-wideband （UWB） radio frequency （RF） system assisted by an electrical bandpass filter （EBPF）. In the first solution, any optical Gaussian pulse with enough bandwidth is transmitted over optical fiber link, and then converted to a power-efficient UWB pulse by an EBPF with a passband of 3.1 10.6GHz. The transmission and modulation of UWB signal is processed in optical domain, whereas the generation of UWB is processed in electrical domain. Both UWB modulations of on-off keying （OOK） and binary phase shift keying （BPSK） are experimentally demon- strated. In the second solution, the EBPF is used to convert any electrical waveform to a power-efficient UWB pulse. Then the electrical UWB pulse is converted to an optical UWB pulse with a Mach-Zehnder modulator （MZM）, and then distributed over long haul fiber link. These two solutions embody the advantages of both low-loss long- haul transmission of optical fiber and mature electrical circuits. And the millimeter-wave UWB signal is also demonstrated.
文摘A combined model of the transmission-line laser model （TLLM） and the digital filter approach is developed to simulate the shuttering characteristic of a semiconductor optical amplifier （SOA）, which is inte- grated with a sampled grating distributed Bragg reflector （SGDBR） laser, to create a so called SOA-SGDBR laser. The SOA section acts as a shutter to blank the laser output during wavelength switching events. Simulated results show that the turn-on edge of the SOA blanking process will oscillate when the facet reflection of SOA is relatively high. This phenomenon is also observed by experiments.
