Multiple phase-shifted(MPS)diffraction grating is an effective way proposed to overcome the spatial hole burning(SHB)effect in a distributed feedback(DFB)laser.We present two symmetric λ/8 phase-shifted DFB lasers by...Multiple phase-shifted(MPS)diffraction grating is an effective way proposed to overcome the spatial hole burning(SHB)effect in a distributed feedback(DFB)laser.We present two symmetric λ/8 phase-shifted DFB lasers by using nanoimprint lithography(NIL).The threshold current of a typical laser is less than 15 mA.The side mode suppression ratio(SMSR)is still above 42 dB even at 100 mA current injection.To show the versatility of NIL,eight different wavelength MPS-DFB lasers on this single chip are also demonstrated.Our results prove that NIL is a promising tool for fabricating high performance complex grating DFB lasers.展开更多
基金the National Natural Science Foundation of China under Grant Nos 11044009,A040507,61076042 and 60607006the Special Project on Development of National Key Scientific Instruments and Equipment of China under Grant No 2011YQ16000205+2 种基金the National Key Technology R&D Program of China under Grant No 2009BAH49B01the National High-Technology Research and Development Program of China under Grant Nos 2011AA010304 and 2011AA03A106the Science and Technology Special Project in Hubei Province under Grant No 2009AAA009.
文摘Multiple phase-shifted(MPS)diffraction grating is an effective way proposed to overcome the spatial hole burning(SHB)effect in a distributed feedback(DFB)laser.We present two symmetric λ/8 phase-shifted DFB lasers by using nanoimprint lithography(NIL).The threshold current of a typical laser is less than 15 mA.The side mode suppression ratio(SMSR)is still above 42 dB even at 100 mA current injection.To show the versatility of NIL,eight different wavelength MPS-DFB lasers on this single chip are also demonstrated.Our results prove that NIL is a promising tool for fabricating high performance complex grating DFB lasers.
