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    • 5. 发明授权
    • Wide-band optical fiber coupler and method for preparing the same
    • 宽带光纤耦合器及其制备方法
    • US5671309A
    • 1997-09-23
    • US495932
    • 1995-06-28
    • Jun AbeMasaaki ShirotaKazuo Koya
    • Jun AbeMasaaki ShirotaKazuo Koya
    • G02B6/28G02B6/26G02B6/42
    • G02B6/2835G02B6/03633G02B6/29377
    • The object of the present invention is to provide a wide-band optical fiber coupler whose light-branching ratio is independent of the wavelength of light rays to be transmitted therethrough as well as a method for preparing the wide-band optical fiber coupler. When an optical fiber 1 having zero-dispersion at 1.55 .mu.m band and an optical fiber 2 having zero-dispersion at 1.3 .mu.m band are fused and drawn to form a coupled portion 3, a light beam 15 is incident upon the optical fiber 2 and the intensity of the light beam outgoing through either of these optical fibers 2 or 1 is measured to detect the light-branching ratio observed at the coupled portion 3. The drawing operation is interrupted at an instance when the detected light-branching ratio falls within the range of 50.+-.5%.
    • 本发明的目的是提供一种宽带光纤耦合器,其光分支比率与要透射的光线的波长无关,以及宽带光纤耦合器的制备方法。 当在1.55μm带上具有零色散的光纤1和在1.3μm带上具有零色散的光纤2被熔化和拉制以形成耦合部分3时,光束15入射到光纤2上 并且测量通过这些光纤2或1中的任一个射出的光束的强度,以检测在耦合部分3处观察到的光分支比。在检测到的光分支比落入内部的情况下,绘制操作被中断 范围为50 +/- 5%。
    • 9. 发明授权
    • Optical amplifier
    • 光放大器
    • US5440420A
    • 1995-08-08
    • US186294
    • 1994-01-25
    • Tsuneo MoriKazuo Koya
    • Tsuneo MoriKazuo Koya
    • G02B6/293G02B6/34G02F1/35H01S3/06H01S3/067H01S3/07H01S3/10H01S3/30
    • H04B10/291H01S3/06754H04B10/2912G02B6/29332
    • Herein disclosed is an optical amplifier which permits sufficient reduction of light-transmission loss when it is incorporated into an optical communication system as a part thereof. The optical amplifier comprises an optical fiber 8 for amplification having a length sufficient for stimulated emission through excitation by an excitation laser beam and sufficient for amplifying a transmitted laser beam; an optical fiber 17 for transmission; and an optical wavelength division multiplexer 6 formed by partially fusing, under drawing conditions, the optical fibers 8 and 17 at a portion in the proximity to the light-incident end of the fiber 8 for amplification. The optical amplifier comprises the optical wavelength division multiplexer 6 formed from a part of the optical fiber 8 for amplification and, therefore, permits substantial reduction in the number of fused portions required for the connection thereof to an optical communication system upon incorporation thereof into the system. For this reason, the connection loss of light can substantially be reduced and accordingly the overall efficiency for amplification is substantially increased.
    • 这里公开了一种光放大器,其作为其一部分被并入到光通信系统中时可以充分降低光传输损耗。 光放大器包括用于放大的光纤8,其具有通过激发激光束激发而受激发射的足够长度并足以放大发射的激光束的长度; 用于传输的光纤17; 以及光纤波分多路复用器6,其在拉伸条件下,在光纤8的光入射端附近的一部分处进行部分熔融而形成,用于放大。 光放大器包括由用于放大的光纤8的一部分形成的光波分复用器6,因此,在将光纤通信系统结合到系统中时,允许将其连接到光通信系统所需的熔接部分的数量显着减少 。 为此,可以显着降低光的连接损耗,从而显着提高放大的整体效率。