采用多量子阱掩埋条形（BRS）增益芯片和拉锥光纤布拉格光栅（FBG）,制作了1.5μm波段FBG外腔式窄线宽半导体激光器。封装后器件实现了全电流范围内稳定单模窄线宽激光输出。30~250 m A驱动电流下线宽小于15.48 k Hz,实测最小线宽为6.42...采用多量子阱掩埋条形（BRS）增益芯片和拉锥光纤布拉格光栅（FBG）,制作了1.5μm波段FBG外腔式窄线宽半导体激光器。封装后器件实现了全电流范围内稳定单模窄线宽激光输出。30~250 m A驱动电流下线宽小于15.48 k Hz,实测最小线宽为6.42 k Hz,频率稳定度为7.2×10-8/s,边模抑制比大于40 d B,最大出纤功率大于10 m W。这种集成窄线宽激光器性能优异,且制作成本低,工艺简单,适于批量生产,可应用于400 Gb/s相干通信系统的发射源与接收机本振源。展开更多
A tunable two-section amplified feedback laser, which employs an amplifier section as the integrated feedback cavity, is designed and fabricated for dual-mode operation with mode separation of 100 GHz. Detailed simula...A tunable two-section amplified feedback laser, which employs an amplifier section as the integrated feedback cavity, is designed and fabricated for dual-mode operation with mode separation of 100 GHz. Detailed simulations and experimental characterizations on the performance of the laser are presented. Promising dual-mode emission with continuous tuning range over 16 GHz（87.41–103.64 GHz） is experimentally demonstrated.展开更多
We experimentally demonstrate all-optical clock recovery for 100 Gb/s return-to-zero on-off keying signals based on a monolithic dual-mode distributed Bragg reflector （DBR） laser, which can realize both mode spacing...We experimentally demonstrate all-optical clock recovery for 100 Gb/s return-to-zero on-off keying signals based on a monolithic dual-mode distributed Bragg reflector （DBR） laser, which can realize both mode spacing and wavelength tuning. By using a coherent injection locking scheme, a 100 GHz optical clock can be recovered with a timing jitter of 530 fs, which is derived by an optical sampling oscilloscope from both the phase noise and the power fluctuation. Furthermore, for degraded injection signals with an optical signal-to-noise ratio as low as 4.1 dB and a 25 km long distance transmission, good-quality optical clocks are all successfully recovered.展开更多
An all-optical clock recovery scheme based on monolithic amplified feedback DFB laser （AFL） diode is proposed for nonreturn-to-zero （NRZ） quadrature phase shift keying （QPSK） format signals. By using a preproces...An all-optical clock recovery scheme based on monolithic amplified feedback DFB laser （AFL） diode is proposed for nonreturn-to-zero （NRZ） quadrature phase shift keying （QPSK） format signals. By using a preprocessing stage, clock recovery （CR） is successfully demonstrated for 40-Gbaud NRZ-QPSK signals based on this scheme. The dependence of the timing jitter of the recovered clock on the optical power of the injected signal is investigated. A minimum timing jitter of 362.8 fs （integrated within a frequency range from 10 Hz to 10 MHz） is obtained.展开更多
A terahertz excitation source based on a dual-lateral-mode distributed Bragg reflector （DBR） laser working in the 1.5 μm range is experimentally demonstrated. By optimizing the width of the ridge waveguide, the fun...A terahertz excitation source based on a dual-lateral-mode distributed Bragg reflector （DBR） laser working in the 1.5 μm range is experimentally demonstrated. By optimizing the width of the ridge waveguide, the fundamental and the first-order lateral modes are obtained from the laser. The mode spacing between the two modes is 9.68 nm, corresponding to a beat signal of 1.21 THz. By tuning the bias currents of the phase and DBR sections, the wavelengths of the two modes can be tuned by 2 nm, with a small strength difference （〈5 dB） and a large side-mode suppression ratio （SMSR 〉 45 dB）.展开更多
The design, fabrication and characterization of a fundamental/first-order mode converter based on mul- timode interference coupler on InP substrate were reported. Detailed optimization of the device parameters were in...The design, fabrication and characterization of a fundamental/first-order mode converter based on mul- timode interference coupler on InP substrate were reported. Detailed optimization of the device parameters were investigated using 3D beam propagation method. In the experiments, the fabricated mode converter realized mode conversion from the fundamental mode to the first-order mode in the wavelength range of 1530-1565 nm with ex- cess loss less than 3 dB. Moreover, LPol and LP11 fiber modes were successfully excited from a few-mode fiber by using the device. This InP-based mode converter can be a possible candidate for integrated transceivers for future mode-division multiplexing system.展开更多
文摘采用多量子阱掩埋条形（BRS）增益芯片和拉锥光纤布拉格光栅（FBG）,制作了1.5μm波段FBG外腔式窄线宽半导体激光器。封装后器件实现了全电流范围内稳定单模窄线宽激光输出。30~250 m A驱动电流下线宽小于15.48 k Hz,实测最小线宽为6.42 k Hz,频率稳定度为7.2×10-8/s,边模抑制比大于40 d B,最大出纤功率大于10 m W。这种集成窄线宽激光器性能优异,且制作成本低,工艺简单,适于批量生产,可应用于400 Gb/s相干通信系统的发射源与接收机本振源。
基金supported in part by the National 973 Project of China(No.2011CB301702)the National 863 Project of China(No.2013AA014202)the National Natural Science Foundation of China(Nos.61201103,61335009,61274045,and 61205031)
文摘A tunable two-section amplified feedback laser, which employs an amplifier section as the integrated feedback cavity, is designed and fabricated for dual-mode operation with mode separation of 100 GHz. Detailed simulations and experimental characterizations on the performance of the laser are presented. Promising dual-mode emission with continuous tuning range over 16 GHz（87.41–103.64 GHz） is experimentally demonstrated.
基金supported by the National 973 Program of China(Nos.2011CB301702 and 2011CB301703)the National Natural Science Foundation of China(Nos.61201103,61335009,and 61321063)
文摘We experimentally demonstrate all-optical clock recovery for 100 Gb/s return-to-zero on-off keying signals based on a monolithic dual-mode distributed Bragg reflector （DBR） laser, which can realize both mode spacing and wavelength tuning. By using a coherent injection locking scheme, a 100 GHz optical clock can be recovered with a timing jitter of 530 fs, which is derived by an optical sampling oscilloscope from both the phase noise and the power fluctuation. Furthermore, for degraded injection signals with an optical signal-to-noise ratio as low as 4.1 dB and a 25 km long distance transmission, good-quality optical clocks are all successfully recovered.
基金This work was supported by the National ＂973＂ Program of China （No. 2011CB301702）, in part by the National ＂863＂ Program of China （No. 2013AA014202）, and the National Natural Science Foundation of China （Nos. 61201103, 61335009, 61274045, and 61205031）.
文摘An all-optical clock recovery scheme based on monolithic amplified feedback DFB laser （AFL） diode is proposed for nonreturn-to-zero （NRZ） quadrature phase shift keying （QPSK） format signals. By using a preprocessing stage, clock recovery （CR） is successfully demonstrated for 40-Gbaud NRZ-QPSK signals based on this scheme. The dependence of the timing jitter of the recovered clock on the optical power of the injected signal is investigated. A minimum timing jitter of 362.8 fs （integrated within a frequency range from 10 Hz to 10 MHz） is obtained.
基金supported by the National Natural Science Foundation of China (No. 61335009, 61274045, 61271066, 61321063)the National 973 Project of China (No. 2011CB301702)the National 863 Project of China (No. 2013AA014202)
文摘A terahertz excitation source based on a dual-lateral-mode distributed Bragg reflector （DBR） laser working in the 1.5 μm range is experimentally demonstrated. By optimizing the width of the ridge waveguide, the fundamental and the first-order lateral modes are obtained from the laser. The mode spacing between the two modes is 9.68 nm, corresponding to a beat signal of 1.21 THz. By tuning the bias currents of the phase and DBR sections, the wavelengths of the two modes can be tuned by 2 nm, with a small strength difference （〈5 dB） and a large side-mode suppression ratio （SMSR 〉 45 dB）.
基金Project supported by the National Basic Research Program of China(No.2014CB340102)the National Natural Science Foundation of China(Nos.61274045,61335009)
文摘The design, fabrication and characterization of a fundamental/first-order mode converter based on mul- timode interference coupler on InP substrate were reported. Detailed optimization of the device parameters were investigated using 3D beam propagation method. In the experiments, the fabricated mode converter realized mode conversion from the fundamental mode to the first-order mode in the wavelength range of 1530-1565 nm with ex- cess loss less than 3 dB. Moreover, LPol and LP11 fiber modes were successfully excited from a few-mode fiber by using the device. This InP-based mode converter can be a possible candidate for integrated transceivers for future mode-division multiplexing system.
