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美国纽约州的Eastman Kodak公司的M.C.Gupta发明一种新的激光频率转换方法。此频率转换装置采用二极管激光器输出至少三束分立激光,第一、第二和第三条光纤与每一束光耦合,每个光纤包括一个内装的光栅,每个光纤传输的激光与其他光纤中传输光的波长有一个规定波长差,此光束一部分后向反射,入射到二极管激光器,二极管激光器将产生此波长的光束。采用频率转换结构接收发射的光束,并改变每个输入光
M.C. Gupta of Eastman Kodak Company of New York, USA, invented a new laser frequency conversion method. The frequency conversion device uses a diode laser to output at least three discrete laser beams. The first, second, and third optical fibers are coupled to each of the optical fibers. Each of the optical fibers includes a built-in grating. Each of the optical fibers transmits laser light and other optical fibers The wavelength of the transmitted light has a prescribed wavelength difference. A portion of this beam is retroreflected and incident upon a diode laser, which will produce a beam of this wavelength. A frequency conversion structure is used to receive the transmitted beam and change each input light