The spectral linewidth of a 64-emitter laser-diode array is effectively suppressed by using a volume Bragg grating(VBG)based external cavity.At a maximal driven current of 90 A,the device produces a cw output of 80W w...The spectral linewidth of a 64-emitter laser-diode array is effectively suppressed by using a volume Bragg grating(VBG)based external cavity.At a maximal driven current of 90 A,the device produces a cw output of 80W with 1.2 W/A slope efficiency and 0.1 nm spectral linewidth(FWHM)centered at 780 nm.The power extraction efficiency reaches 90%as compared with the free running case.The central wavelength of the narrowed spectrum is tuned over a 0.3 nm range by adjusting the VBG's temperature.The absorption of 45%laser radiation by a 5-mm-long rubidium vapor cell with 150 Torr ethane and 450 Torr helium at 383 K is demonstrated.展开更多
We report 12.8 W supercontinuum generation with a high optical-to-optical conversion efficiency of up to 85%in an all-fiber device.This is achieved by using an all-fiber picosecond master oscillator power amplifier la...We report 12.8 W supercontinuum generation with a high optical-to-optical conversion efficiency of up to 85%in an all-fiber device.This is achieved by using an all-fiber picosecond master oscillator power amplifier laser,which has an output pigtail double clad fiber,to pump a 3-m photonic crystal fiber with the core at one end enlarged by adiabatically collapsing two inner layers of air holes while keeping other holes open.Our experimental results show that the short-wavelength generation is due to dispersive wave trapping by redshifted solitons.展开更多
文摘The spectral linewidth of a 64-emitter laser-diode array is effectively suppressed by using a volume Bragg grating(VBG)based external cavity.At a maximal driven current of 90 A,the device produces a cw output of 80W with 1.2 W/A slope efficiency and 0.1 nm spectral linewidth(FWHM)centered at 780 nm.The power extraction efficiency reaches 90%as compared with the free running case.The central wavelength of the narrowed spectrum is tuned over a 0.3 nm range by adjusting the VBG's temperature.The absorption of 45%laser radiation by a 5-mm-long rubidium vapor cell with 150 Torr ethane and 450 Torr helium at 383 K is demonstrated.
基金by the National Natural Science Foundation of China under Grant Nos 61077076 and 61007037the Program for New Century Excellent Talents in University under Grant No NCET-08-0142.
文摘We report 12.8 W supercontinuum generation with a high optical-to-optical conversion efficiency of up to 85%in an all-fiber device.This is achieved by using an all-fiber picosecond master oscillator power amplifier laser,which has an output pigtail double clad fiber,to pump a 3-m photonic crystal fiber with the core at one end enlarged by adiabatically collapsing two inner layers of air holes while keeping other holes open.Our experimental results show that the short-wavelength generation is due to dispersive wave trapping by redshifted solitons.
