The retracing behavior of the phase-matching angle(RBPA)in many nonlinear optical crystals for second harmonic generation(SHG)has been demonstrated by calculation.The generality of this phenomenon is successfully expl...The retracing behavior of the phase-matching angle(RBPA)in many nonlinear optical crystals for second harmonic generation(SHG)has been demonstrated by calculation.The generality of this phenomenon is successfully explained by a theoretical analysis based on classical optics.The wavelengths of the fundamental waves and phasematching angles for describing the RBPA of eight kinds of crystals are presented.Furthermore,we point out that RBPA exists generally in both uniaxial and biaxial crystals for both type Ⅰ and type Ⅱ SHG.展开更多
Efficient generation of deep ultraviolet radiation at wavelength of less than 0.20 μm obtained by using LiB_(3)O_(5) crystal is reported.High power radiation at 0.1914μm has been produced via sum-frequency-mixing of...Efficient generation of deep ultraviolet radiation at wavelength of less than 0.20 μm obtained by using LiB_(3)O_(5) crystal is reported.High power radiation at 0.1914μm has been produced via sum-frequency-mixing of two waves with wavelengths of 0.2128 and 1.9071μm in LiB_(3)O_(5) crystal.An average output power of about 2.0mW and a conversion efficiency of 8%have been achieved.展开更多
High optical quality single crystal fibers of β-BaB_(2)O_(4)(BBO),an important nonlinear optical material,were grown along the second-harmonic generation phase matching direction by the laser heated pedestal growth m...High optical quality single crystal fibers of β-BaB_(2)O_(4)(BBO),an important nonlinear optical material,were grown along the second-harmonic generation phase matching direction by the laser heated pedestal growth method.The effects of various growth parameters,especially growth rate,on growth stability and fiber quality were investigated.It was found that 0,25mm/min is the suitable growth rate which can reduces the harmful effects of growth anisotropy and constitutional supercooling on fiber quality.展开更多
We report the operation of aβ-BaB_(2)O_(4)(BBO)optical parametric oscillator(OPO)broadly tunable in the visible and the near infrared.Quantum efficiency of 22.7%for the signal and 34.1%for the idler corresponding to ...We report the operation of aβ-BaB_(2)O_(4)(BBO)optical parametric oscillator(OPO)broadly tunable in the visible and the near infrared.Quantum efficiency of 22.7%for the signal and 34.1%for the idler corresponding to the total energy conversion efficiency of 25.9%has been achieved.The maximum average output power and the maximum output energy reached 220m W and 22rnJ/pulse,respectively.By changing the matching angle of the OPO,the output wavelength was continuously scanned throughout 425-2144nm.展开更多
The microscopic and macroscopic second-order optical susceptibilities of ten benzene derivative molecules and three crystals were calculated and discussed,basing on the nonlinear optical active group theory.
A tunable picosecond narrow band β-BaB_(2)O_(4)(BBO)superluminescent optical parametric self-amplification(OPSA)pumped by the third harmonic of an actively-passively mode-locked Nd:YAG laser has been demonstrated.The...A tunable picosecond narrow band β-BaB_(2)O_(4)(BBO)superluminescent optical parametric self-amplification(OPSA)pumped by the third harmonic of an actively-passively mode-locked Nd:YAG laser has been demonstrated.The output wavelength of the OPSA was tunable from 406.6nm to 2777nm.The maximum energy conversion efficiency was 11%.The maximum peak power of the visible output was as high as 13MW.展开更多
The angular acceptance and the spectral acceptance about the retracing point of phase-matching angles for type I second-harmonic generation in LiB_(3)O_(5)(LBO)crystal have been measured.The exact wavelength in retrac...The angular acceptance and the spectral acceptance about the retracing point of phase-matching angles for type I second-harmonic generation in LiB_(3)O_(5)(LBO)crystal have been measured.The exact wavelength in retracing point is found to be 1.303μm,and the spectral acceptance bandwidth and angular acceptance width are about 115nm-cm and 11mrad-cm respectively.A possible application of LBO crystal in direct frequency doubling of femtosecond laser pulse has been predicted with theory.展开更多
基金the High Technology Research and Development Programme of China.
文摘The retracing behavior of the phase-matching angle(RBPA)in many nonlinear optical crystals for second harmonic generation(SHG)has been demonstrated by calculation.The generality of this phenomenon is successfully explained by a theoretical analysis based on classical optics.The wavelengths of the fundamental waves and phasematching angles for describing the RBPA of eight kinds of crystals are presented.Furthermore,we point out that RBPA exists generally in both uniaxial and biaxial crystals for both type Ⅰ and type Ⅱ SHG.
基金Supported by Science Fund of the Chinese Organization of Crystal Growth.
文摘Efficient generation of deep ultraviolet radiation at wavelength of less than 0.20 μm obtained by using LiB_(3)O_(5) crystal is reported.High power radiation at 0.1914μm has been produced via sum-frequency-mixing of two waves with wavelengths of 0.2128 and 1.9071μm in LiB_(3)O_(5) crystal.An average output power of about 2.0mW and a conversion efficiency of 8%have been achieved.
文摘High optical quality single crystal fibers of β-BaB_(2)O_(4)(BBO),an important nonlinear optical material,were grown along the second-harmonic generation phase matching direction by the laser heated pedestal growth method.The effects of various growth parameters,especially growth rate,on growth stability and fiber quality were investigated.It was found that 0,25mm/min is the suitable growth rate which can reduces the harmful effects of growth anisotropy and constitutional supercooling on fiber quality.
基金This work is supported by the Third World Academy of Sciences。
文摘We report the operation of aβ-BaB_(2)O_(4)(BBO)optical parametric oscillator(OPO)broadly tunable in the visible and the near infrared.Quantum efficiency of 22.7%for the signal and 34.1%for the idler corresponding to the total energy conversion efficiency of 25.9%has been achieved.The maximum average output power and the maximum output energy reached 220m W and 22rnJ/pulse,respectively.By changing the matching angle of the OPO,the output wavelength was continuously scanned throughout 425-2144nm.
文摘The microscopic and macroscopic second-order optical susceptibilities of ten benzene derivative molecules and three crystals were calculated and discussed,basing on the nonlinear optical active group theory.
基金Supported by the Academia Sinica and the Third World Academy of Sciences.
文摘A tunable picosecond narrow band β-BaB_(2)O_(4)(BBO)superluminescent optical parametric self-amplification(OPSA)pumped by the third harmonic of an actively-passively mode-locked Nd:YAG laser has been demonstrated.The output wavelength of the OPSA was tunable from 406.6nm to 2777nm.The maximum energy conversion efficiency was 11%.The maximum peak power of the visible output was as high as 13MW.
文摘The angular acceptance and the spectral acceptance about the retracing point of phase-matching angles for type I second-harmonic generation in LiB_(3)O_(5)(LBO)crystal have been measured.The exact wavelength in retracing point is found to be 1.303μm,and the spectral acceptance bandwidth and angular acceptance width are about 115nm-cm and 11mrad-cm respectively.A possible application of LBO crystal in direct frequency doubling of femtosecond laser pulse has been predicted with theory.
