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衍射光束均匀器美国北卡罗来州Digital Optics公司的Kathman A D等人发明一种衍射光束均匀器,这种均匀器可把输入空间分布不均匀的光束变成分布较均匀的输出光束.均匀器由具有相位透射图形的计算机产生全息图构成,它可在规定的角度范围内使相位透射图形的傅里叶变换呈均匀分布.(美国专利号:5850300)(No.88)光纤激光输出功率放大器美国加州SDL公司的Grubp S G等人提出一种新的激光功率放大方法.这种方法是采有一个具有主动放大介质的光纤系统,该系统传输第一波长的光,同时产生并传输
Diffracted Beam Homogenizer Kathman AD et al., Digital Optics, Inc., North Carolina, USA, have invented a diffractive beam homogenizer that converts a light beam with an unevenly-spaced input into a more uniformly distributed light beam. Consists of a computer generated hologram with a phase transmission pattern which provides a uniform distribution of the Fourier transform of the phase transmission pattern over a defined angular range (U.S. Patent No. 5850300) (No. 88) fiber laser output power amplifier Grubp SG et al., SDL, Calif., USA, propose a new laser power amplification method using a fiber optic system with an active amplification medium that transmits light of a first wavelength while generating and transmitting