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self sum
相关语句
  自和
     Also, a laser output of 445μJ at 436-443 nm range with an optical to optical efficiency of 7.3% was obtained by using self sum frequency method when this crystal was pumped by dye laser.
     通过晶体的自和频得到445μJ的蓝色激光输出,光-光转换效率为7.3%.
短句来源
  相似匹配句对
     Modeling of the Self-Sum-Frequency-Mixing Laser and Its Application
     自混频激光理论模型及应用
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     Self and Memory
     自我与记忆
短句来源
     On Self-Education
     自我教育论
短句来源
     On Zero Sum
     说“零和”
短句来源
     THE BOUND OF THE SUM OF THE HALF DEGREE SEQUENCE OF SELF-COMPLEMENTARY GRAPH
     自补图半度序列和的界
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The self sum frequency mixing (self SFM) process is recently recognized as a new way of obtaining blue lasers,that is,summing the fundamental laser generated by a LD and remaining LD light by means of a single nonlinear laser crystal.This kind of scheme can achieve both laser action and nonlinear conversion in one crystal,which results in more compact,robust and manageable devices. A theoretical model for describing the self SFM laser generation is developed,in which spatial distributions...

The self sum frequency mixing (self SFM) process is recently recognized as a new way of obtaining blue lasers,that is,summing the fundamental laser generated by a LD and remaining LD light by means of a single nonlinear laser crystal.This kind of scheme can achieve both laser action and nonlinear conversion in one crystal,which results in more compact,robust and manageable devices. A theoretical model for describing the self SFM laser generation is developed,in which spatial distributions of the pump and fundamental lasers with arbitrary beam waists are fully taken into account.The analysis can be simplified by using the average approximation.The output power of the self SFM laser is related to many physical parameters such as crystal length,doped ion concentration,pump waist,cavity mode size,walk off angle,pump power,absorption coefficient at the pump wavelength,phase mismatch and effective nonlinear coefficient.Hence it is necessary to reach a compromise among the above parameters in order to optimize the self SFM laser output.The model is applied to the self SFM laser generated by two kinds of crystals of current interest,NYAB and Nd∶GdCOB.Their self SFM laser output properties are theoretically discussed,predicted or verified.The calculated results are compared with the experiments,which shows the validity of our model. Based on the analysis of applying the model to NYAB and Nd∶GdCOB,some useful information can be summarized on improving the output power of the self SFM laser,that is,large effective nonlinear coefficient,small walk off angle,small internal loss,small phase mismatch,suitable beam waists(pump and fundamental),appropriate crystal length and ion concentration. The model is not limited to self SFM lasers and may be applied to general analysis of the laser generation with Gaussian beams,for instance,fundamental oscillation,SFD lasers,intracavity frequency doubling lasers and microchip lasers.Particularly,for microchip lasers,the model can be further simplified by assuming that the pump waist and cavity mode size are constant in the gain medium.

建立了在同一块非线性激光晶体上实现自混频激光的理论模型。该模型计入了具有任意腰斑大小的泵浦光和腔内基频光的空间分布 ,并将该模型应用到NYAB和Nd∶GdCOB的自混频蓝光实验。理论分析预测和证实了一些实验结果 ,同时 ,讨论和总结了提高自混频激光输出效率的途径。

The high quality crystals of GdAl_3(BO_3)_4:Nd3+ with the sizes of 35mm have been grown from K2Mo3O10-B2O3 solvent system.The a and π polarization absorption and edrission spectra of GdAl3(BO3)4:Nd3+ have been measured. A laser output of 119.5μJ at 0.532 μm with an optical to optical efficiency of 4.3% was obtained by using self-frequency doubling technology when this crystal was pumped by dye laser. Also, a laser output of 445μJ at 436-443 nm range with an optical to optical efficiency of 7.3% was obtained...

The high quality crystals of GdAl_3(BO_3)_4:Nd3+ with the sizes of 35mm have been grown from K2Mo3O10-B2O3 solvent system.The a and π polarization absorption and edrission spectra of GdAl3(BO3)4:Nd3+ have been measured. A laser output of 119.5μJ at 0.532 μm with an optical to optical efficiency of 4.3% was obtained by using self-frequency doubling technology when this crystal was pumped by dye laser. Also, a laser output of 445μJ at 436-443 nm range with an optical to optical efficiency of 7.3% was obtained by using self sum frequency method when this crystal was pumped by dye laser.

我们用K2MO3O10-B2O3助熔剂生长出尺寸为35mm的优质Nd3+:GdAl3(BO3)4激光晶体,测定了偏振的吸收和发射光谱.加工出长度为4.60mm的激光器件,用染料激光器泵浦,潘过晶体的自倍频得到119.5μJ的绿色激光输出,光-光转换效率为4.3%;通过晶体的自和频得到445μJ的蓝色激光输出,光-光转换效率为7.3%.

Recently attention is focused on the quasi-phase-matched self-frequency-conversion (SFC) laser generations in rare-earth doped optical superlattice crystals, mainly because of their ability to generate multicolor lasers across the visible portion of the spectrum through a single crystal. We present a general model for quasi-phase-matched SFC lasers in rare-earth doped optical superlattice crystals by combining quasi-phase-matching (QPM) theory and the self-sum-frequency mixing (or self-frequency-doubling)...

Recently attention is focused on the quasi-phase-matched self-frequency-conversion (SFC) laser generations in rare-earth doped optical superlattice crystals, mainly because of their ability to generate multicolor lasers across the visible portion of the spectrum through a single crystal. We present a general model for quasi-phase-matched SFC lasers in rare-earth doped optical superlattice crystals by combining quasi-phase-matching (QPM) theory and the self-sum-frequency mixing (or self-frequency-doubling) laser patterns. The new model takes into account the TEM00 distribution of Gaussian beams with loose focusing, absorption and coupling of pump beams, and effects of imperfect periodical structures. Two types of errors: (1) random period errors and (2) linearly tapered period errors in the periodicity of these structures are analyzed to find their effects on the value of equivalent effective nonlinear coefficient and on the tuning curves of normalized conversion efficiency. Finally the model is applied to simulate the SFC laser properties in a Nd3+ doped aperiodically poled lithium niobate crystal. The calculated results, especially the threshold, the total visible laser output power and spectrum of relative laser intensity in the visible, agree well with the experiment, which indicates the validity of this model. Most significantly, the model presented explains and verifies the simultaneous laser generation of multiple visible wavelengths (686,605,542,482,441 and 372nm) from a single crystal.

通过结合准相位匹配理论和空间分布自混频(或自倍频)激光模型提出了稀土掺杂光学超晶格材料自变频激光理论模型。该模型计入了弱聚焦的高斯光束空间分布,泵浦耦合以及非理想周期结构的影响。并应用该理论模型对Nd3+离子掺杂非理想周期极化铌酸锂(Nd3+:APLN)晶体同步自变频多波长激光进行了模拟计算。计算结果,尤其是阈值、可见激光总输出功率和同步可见激光谱线相对强度分布等与实验结果符合得很好,从而表明该模型的有效性。

 
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